Merge remote-tracking branch 'origin/main' into vetorized_lm

.dockerignore

@@ -1,3 +1,4 @@
 aml
 target
-server/transformers
+server/transformers
+server/flash-attention

.github/ISSUE_TEMPLATE/bug-report.yml

@@ -0,0 +1,67 @@
+name: "\U0001F41B Bug Report"
+description: Submit a bug report to help us improve text-generation-inference
+body:
+  - type: textarea
+    id: system-info
+    attributes:
+      label: System Info
+      description: | 
+        Please share your system info with us (`text-generation-launcher --env` if installed locally).
+        The full command line used that causes issues: 
+        OS version:
+        Rust version (if self-compiling, `cargo version`):
+        Model being used (`curl 127.0.0.1:8080/info | jq`):
+          If local model please explicit the kind of model and/or equivalents.
+        Hardware used (GPUs, how many, on which cloud) (`nvidia-smi`): 
+        Deployment specificities (Kubernetes, EKS, AKS, any particular deployments):
+        The current version being used:
+
+      placeholder: text-generation-inference version, platform, python version, ...
+    validations:
+      required: true
+
+  - type: checkboxes
+    id: information-scripts-examples
+    attributes:
+      label: Information
+      description: 'The problem arises when using:'
+      options:
+        - label: "Docker"
+        - label: "The CLI directly"
+
+  - type: checkboxes
+    id: information-tasks
+    attributes:
+      label: Tasks
+      description: "The thing I am working on is:"
+      options:
+        - label: "An officially supported command"
+        - label: "My own modifications"
+
+  - type: textarea
+    id: reproduction
+    validations:
+      required: true
+    attributes:
+      label: Reproduction
+      description: |
+        Please provide a code sample that reproduces the problem you ran into. It can be a Colab link or just a code snippet.
+        If you have code snippets, error messages, stack traces please provide them here as well.
+        Important! Use code tags to correctly format your code. See https://help.github.com/en/github/writing-on-github/creating-and-highlighting-code-blocks#syntax-highlighting
+        Do not use screenshots, as they are hard to read and (more importantly) don't allow others to copy-and-paste your code.
+
+      placeholder: |
+        Steps to reproduce the behavior:
+          
+          1.
+          2.
+          3.
+          
+
+  - type: textarea
+    id: expected-behavior
+    validations:
+      required: true
+    attributes:
+      label: Expected behavior
+      description: "A clear and concise description of what you would expect to happen."

.github/ISSUE_TEMPLATE/config.yml

@@ -0,0 +1,2 @@
+blank_issues_enabled: true
+version: 2.1

.github/ISSUE_TEMPLATE/feature-request.yml

@@ -0,0 +1,31 @@
+name: "\U0001F680 Feature request"
+description: Submit a proposal/request for a new text-generation-inference feature
+labels: [ "feature" ]
+body:
+  - type: textarea
+    id: feature-request
+    validations:
+      required: true
+    attributes:
+      label: Feature request
+      description: |
+        A clear and concise description of the feature proposal. Please provide a link to the paper and code in case they exist.
+
+  - type: textarea
+    id: motivation
+    validations:
+      required: true
+    attributes:
+      label: Motivation
+      description: |
+        Please outline the motivation for the proposal. Is your feature request related to a problem? e.g., I'm always frustrated when [...]. If this is related to another GitHub issue, please link here too.
+        
+
+  - type: textarea
+    id: contribution
+    validations:
+      required: true
+    attributes:
+      label: Your contribution
+      description: |
+        Is there any way that you could help, e.g. by submitting a PR? Make sure to read the CONTRIBUTING.MD [readme](https://github.com/huggingface/text-generation-inference/blob/main/CONTRIBUTING.md)

.github/ISSUE_TEMPLATE/new-model-addition.yml

@@ -0,0 +1,31 @@
+name: "\U0001F31F New model addition"
+description: Submit a proposal/request to implement a new model
+labels: [ "New model" ]
+
+body:
+  - type: textarea
+    id: description-request
+    validations:
+      required: true
+    attributes:
+      label: Model description
+      description: |
+        Put any and all important information relative to the model
+
+  - type: checkboxes
+    id: information-tasks
+    attributes:
+      label: Open source status
+      description: |
+          Please note that if the model implementation isn't available or if the weights aren't open-source, we are less likely to implement it in `transformers`.
+      options:
+        - label: "The model implementation is available"
+        - label: "The model weights are available"
+
+  - type: textarea
+    id: additional-info
+    attributes:
+      label: Provide useful links for the implementation
+      description: |
+        Please provide information regarding the implementation, the weights, and the authors.
+        Please mention the authors by @gh-username if you're aware of their usernames.

.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,40 @@
+# What does this PR do?
+
+<!--
+Congratulations! You've made it this far! You're not quite done yet though.
+
+Once merged, your PR is going to appear in the release notes with the title you set, so make sure it's a great title that fully reflects the extent of your awesome contribution.
+
+Then, please replace this with a description of the change and which issue is fixed (if applicable). Please also include relevant motivation and context. List any dependencies (if any) that are required for this change.
+
+Once you're done, someone will review your PR shortly (see the section "Who can review?" below to tag some potential reviewers). They may suggest changes to make the code even better. If no one reviewed your PR after a week has passed, don't hesitate to post a new comment @-mentioning the same persons---sometimes notifications get lost.
+-->
+
+<!-- Remove if not applicable -->
+
+Fixes # (issue)
+
+
+## Before submitting
+- [ ] This PR fixes a typo or improves the docs (you can dismiss the other checks if that's the case).
+- [ ] Did you read the [contributor guideline](https://github.com/huggingface/transformers/blob/main/CONTRIBUTING.md#start-contributing-pull-requests),
+      Pull Request section?
+- [ ] Was this discussed/approved via a Github issue or the [forum](https://discuss.huggingface.co/)? Please add a link
+      to it if that's the case.
+- [ ] Did you make sure to update the documentation with your changes? Here are the
+      [documentation guidelines](https://github.com/huggingface/transformers/tree/main/docs), and
+      [here are tips on formatting docstrings](https://github.com/huggingface/transformers/tree/main/docs#writing-source-documentation).
+- [ ] Did you write any new necessary tests?
+
+
+## Who can review?
+
+Anyone in the community is free to review the PR once the tests have passed. Feel free to tag
+members/contributors who may be interested in your PR.
+
+<!-- Your PR will be replied to more quickly if you can figure out the right person to tag with @
+
+
+@OlivierDehaene OR @Narsil
+
+ -->

.github/workflows/build.yaml

@@ -10,6 +10,7 @@ on:
   pull_request:
     paths:
       - ".github/workflows/build.yaml"
+      - "integration-tests/**"
       - "server/**"
       - "proto/**"
       - "router/**"
@@ -20,13 +21,48 @@ on:
     branches:
       - 'main'
 
-concurrency:
-  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
-  cancel-in-progress: true
-
 jobs:
+  start-runner:
+    name: Start self-hosted EC2 runner
+    runs-on: ubuntu-latest
+    env:
+      AWS_REGION: us-east-1
+      EC2_AMI_ID: ami-03cfed9ea28f4b002
+      EC2_INSTANCE_TYPE: g5.12xlarge
+      EC2_SUBNET_ID: subnet-931b34f5,subnet-ecb993cd,subnet-943dc2d8,subnet-45371f1a,subnet-ee93e0df,subnet-fddc3dfc
+      EC2_SECURITY_GROUP: sg-04d472c808f365022
+    outputs:
+      label: ${{ steps.start-ec2-runner.outputs.label }}
+      ec2-instance-id: ${{ steps.start-ec2-runner.outputs.ec2-instance-id }}
+    steps:
+      - name: Configure AWS credentials
+        uses: aws-actions/configure-aws-credentials@v1
+        with:
+          aws-access-key-id: ${{ secrets.AWS_ACCESS_KEY_ID }}
+          aws-secret-access-key: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
+          aws-region: ${{ env.AWS_REGION }}
+      - name: Start EC2 runner
+        id: start-ec2-runner
+        uses: philschmid/philschmid-ec2-github-runner@main
+        with:
+          mode: start
+          github-token: ${{ secrets.GH_PERSONAL_ACCESS_TOKEN }}
+          ec2-image-id: ${{ env.EC2_AMI_ID }}
+          ec2-instance-type: ${{ env.EC2_INSTANCE_TYPE }}
+          subnet-id: ${{ env.EC2_SUBNET_ID }}
+          security-group-id: ${{ env.EC2_SECURITY_GROUP }}
+          aws-resource-tags: > # optional, requires additional permissions
+            [
+              {"Key": "Name", "Value": "ec2-tgi-github-runner"},
+              {"Key": "GitHubRepository", "Value": "${{ github.repository }}"}
+            ]
+
   build-and-push-image:
-    runs-on: large-runner
+    concurrency:
+      group: ${{ github.workflow }}-${{ github.job }}-${{ github.head_ref || github.run_id }}
+      cancel-in-progress: true
+    needs: start-runner # required to start the main job when the runner is ready
+    runs-on: ${{ needs.start-runner.outputs.label }} # run the job on the newly created runner
     permissions:
       contents: write
       packages: write
@@ -49,7 +85,7 @@ jobs:
         with:
           cosign-release: 'v1.13.1'
       - name: Tailscale
-        uses: tailscale/github-action@v1
+        uses: tailscale/github-action@7bd8039bf25c23c4ab1b8d6e2cc2da2280601966
         with:
           authkey: ${{ secrets.TAILSCALE_AUTHKEY }}
       - name: Login to GitHub Container Registry
@@ -72,7 +108,19 @@ jobs:
           username: ${{ secrets.AZURE_DOCKER_USERNAME }}
           password: ${{ secrets.AZURE_DOCKER_PASSWORD }}
           registry: db4c2190dd824d1f950f5d1555fbadf0.azurecr.io
+      # If pull request
       - name: Extract metadata (tags, labels) for Docker
+        if: ${{ github.event_name == 'pull_request' }}
+        id: meta-pr
+        uses: docker/metadata-action@v4.3.0
+        with:
+          images: |
+            registry.internal.huggingface.tech/api-inference/community/text-generation-inference
+          tags: |
+            type=raw,value=sha-${{ env.GITHUB_SHA_SHORT }}
+      # If main, release or tag
+      - name: Extract metadata (tags, labels) for Docker
+        if: ${{ github.event_name != 'pull_request' }}
         id: meta
         uses: docker/metadata-action@v4.3.0
         with:
@@ -93,12 +141,13 @@ jobs:
         with:
           context: .
           file: Dockerfile
-          push: ${{ github.event_name != 'pull_request' }}
+          push: true
           platforms: 'linux/amd64'
           build-args: |
             GIT_SHA=${{ env.GITHUB_SHA }}
-          tags: ${{ steps.meta.outputs.tags }}
+            DOCKER_LABEL=sha-${{ env.GITHUB_SHA_SHORT }}
-          labels: ${{ steps.meta.outputs.labels }}
+          tags: ${{ steps.meta.outputs.tags || steps.meta-pr.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels || steps.meta-pr.outputs.labels }}
           cache-from: type=registry,ref=registry.internal.huggingface.tech/api-inference/community/text-generation-inference:cache,mode=max
           cache-to: type=registry,ref=registry.internal.huggingface.tech/api-inference/community/text-generation-inference:cache,mode=max
       # Sign the resulting Docker image digest except on PRs.
@@ -135,52 +184,64 @@ jobs:
         with:
           sarif_file: 'trivy-results.sarif'
 
-  build-and-push-sagemaker-image:
+  integration-tests:
+    concurrency:
+      group: ${{ github.workflow }}-${{ github.job }}-${{ github.head_ref || github.run_id }}
+      cancel-in-progress: true
     needs:
-      - build-and-push-image
+      - start-runner
-    runs-on: ubuntu-latest
+      - build-and-push-image # Wait for the docker image to be built
+    runs-on: ${{ needs.start-runner.outputs.label }} # run the job on the newly created runner
+    env:
+      DOCKER_VOLUME: /cache
     steps:
-      - name: Checkout repository
+      - uses: actions/checkout@v2
-        uses: actions/checkout@v3
-      - name: Initialize Docker Buildx
-        uses: docker/setup-buildx-action@v2.0.0
-        with:
-          install: true
       - name: Inject slug/short variables
         uses: rlespinasse/github-slug-action@v4.4.1
+      - name: Set up Python
+        uses: actions/setup-python@v4
+        with:
+          python-version: 3.9
       - name: Tailscale
-        uses: tailscale/github-action@v1
+        uses: tailscale/github-action@7bd8039bf25c23c4ab1b8d6e2cc2da2280601966
         with:
           authkey: ${{ secrets.TAILSCALE_AUTHKEY }}
-      - name: Login to internal Container Registry
+      - name: Prepare disks
-        uses: docker/login-action@v2.1.0
+        run: |
+          sudo mkfs -t ext4 /dev/nvme1n1
+          sudo mkdir ${{ env.DOCKER_VOLUME }}
+          sudo mount /dev/nvme1n1 ${{ env.DOCKER_VOLUME }}
+      - name: Install
+        run: |
+          pip install pytest-xdist 
+          make install-integration-tests
+      - name: Run tests
+        run: |
+          export DOCKER_IMAGE=registry.internal.huggingface.tech/api-inference/community/text-generation-inference:sha-${{ env.GITHUB_SHA_SHORT }}
+          export HUGGING_FACE_HUB_TOKEN=${{ secrets.HUGGING_FACE_HUB_TOKEN }}
+          pytest -s -vv -n 2 --dist loadfile integration-tests
+
+  stop-runner:
+    name: Stop self-hosted EC2 runner
+    needs:
+      - start-runner
+      - build-and-push-image
+      - integration-tests
+    runs-on: ubuntu-latest
+    env:
+      AWS_REGION: us-east-1
+    if: ${{ always() }} # required to stop the runner even if the error happened in the previous jobs
+    steps:
+      - name: Configure AWS credentials
+        uses: aws-actions/configure-aws-credentials@v1
         with:
-          username: ${{ secrets.TAILSCALE_DOCKER_USERNAME }}
+          aws-access-key-id: ${{ secrets.AWS_ACCESS_KEY_ID }}
-          password: ${{ secrets.TAILSCALE_DOCKER_PASSWORD }}
+          aws-secret-access-key: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
-          registry: registry.internal.huggingface.tech
+          aws-region: ${{ env.AWS_REGION }}
-      - name: Extract metadata (tags, labels) for Docker
+      - name: Stop EC2 runner
-        id: meta
+        uses: philschmid/philschmid-ec2-github-runner@main
-        uses: docker/metadata-action@v4.3.0
         with:
-          flavor: |
+          mode: stop
-            latest=auto
+          github-token: ${{ secrets.GH_PERSONAL_ACCESS_TOKEN }}
-          images: |
+          label: ${{ needs.start-runner.outputs.label }}
-            registry.internal.huggingface.tech/api-inference/community/text-generation-inference/sagemaker
+          ec2-instance-id: ${{ needs.start-runner.outputs.ec2-instance-id }}
-          tags: |
-            type=semver,pattern={{version}}
-            type=semver,pattern={{major}}.{{minor}}
-            type=raw,value=latest,enable=${{ github.ref == format('refs/heads/{0}', github.event.repository.default_branch) }}
-            type=raw,value=sha-${{ env.GITHUB_SHA_SHORT }}
-      - name: Build and push Docker image
-        uses: docker/build-push-action@v2
-        with:
-          context: .
-          file: Dockerfile
-          push: ${{ github.event_name != 'pull_request' }}
-          platforms: 'linux/amd64'
-          build-args: |
-            GIT_SHA={{ env.GITHUB_SHA }}
-          target: sagemaker
-          tags: ${{ steps.meta.outputs.tags }}
-          labels: ${{ steps.meta.outputs.labels }}
-          cache-from: type=registry,ref=registry.internal.huggingface.tech/api-inference/community/text-generation-inference:cache,mode=max

.github/workflows/client-tests.yaml

@@ -22,4 +22,4 @@ jobs:
       - name: Run tests
         run: |
           pip install pytest pytest-asyncio
-          cd clients/python && pytest tests
+          make python-client-tests

.github/workflows/tests.yaml

@@ -66,7 +66,8 @@ jobs:
       - name: Run server tests
         run: |
           pip install pytest
-          HF_HUB_ENABLE_HF_TRANSFER=1 pytest -sv server/tests
+          export HUGGING_FACE_HUB_TOKEN=${{ secrets.HUGGING_FACE_HUB_TOKEN }}
+          pytest -s -vv server/tests
       - name: Run Rust fmt
         run: |
           cargo fmt --check

Cargo.lock

@@ -134,6 +134,17 @@ version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d468802bab17cbc0cc575e9b053f41e72aa36bfa6b7f55e3529ffa43161b97fa"
 
+[[package]]
+name = "average"
+version = "0.13.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "843ec791d3f24503bbf72bbd5e49a3ab4dbb4bcd0a8ef6b0c908efa73caa27b1"
+dependencies = [
+ "easy-cast",
+ "float-ord",
+ "num-traits",
+]
+
 [[package]]
 name = "axum"
 version = "0.6.15"
@@ -293,6 +304,12 @@ dependencies = [
  "zip",
 ]
 
+[[package]]
+name = "cassowary"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "df8670b8c7b9dae1793364eafadf7239c40d669904660c5960d74cfd80b46a53"
+
 [[package]]
 name = "cc"
 version = "1.0.79"
@@ -461,6 +478,31 @@ dependencies = [
  "cfg-if",
 ]
 
+[[package]]
+name = "crossterm"
+version = "0.26.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a84cda67535339806297f1b331d6dd6320470d2a0fe65381e79ee9e156dd3d13"
+dependencies = [
+ "bitflags",
+ "crossterm_winapi",
+ "libc",
+ "mio",
+ "parking_lot",
+ "signal-hook",
+ "signal-hook-mio",
+ "winapi",
+]
+
+[[package]]
+name = "crossterm_winapi"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2ae1b35a484aa10e07fe0638d02301c5ad24de82d310ccbd2f3693da5f09bf1c"
+dependencies = [
+ "winapi",
+]
+
 [[package]]
 name = "crypto-common"
 version = "0.1.6"
@@ -591,6 +633,15 @@ dependencies = [
  "winapi",
 ]
 
+[[package]]
+name = "easy-cast"
+version = "0.4.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4bd102ee8c418348759919b83b81cdbdc933ffe29740b903df448b4bafaa348e"
+dependencies = [
+ "libm",
+]
+
 [[package]]
 name = "either"
 version = "1.8.1"
@@ -679,6 +730,12 @@ dependencies = [
  "miniz_oxide",
 ]
 
+[[package]]
+name = "float-ord"
+version = "0.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8ce81f49ae8a0482e4c55ea62ebbd7e5a686af544c00b9d090bba3ff9be97b3d"
+
 [[package]]
 name = "float_eq"
 version = "1.0.1"
@@ -1165,6 +1222,12 @@ version = "0.2.141"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3304a64d199bb964be99741b7a14d26972741915b3649639149b2479bb46f4b5"
 
+[[package]]
+name = "libm"
+version = "0.2.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "348108ab3fba42ec82ff6e9564fc4ca0247bdccdc68dd8af9764bbc79c3c8ffb"
+
 [[package]]
 name = "linux-raw-sys"
 version = "0.3.1"
@@ -1428,6 +1491,15 @@ dependencies = [
  "minimal-lexical",
 ]
 
+[[package]]
+name = "ntapi"
+version = "0.4.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e8a3895c6391c39d7fe7ebc444a87eb2991b2a0bc718fdabd071eec617fc68e4"
+dependencies = [
+ "winapi",
+]
+
 [[package]]
 name = "nu-ansi-term"
 version = "0.46.0"
@@ -1438,6 +1510,16 @@ dependencies = [
  "winapi",
 ]
 
+[[package]]
+name = "num-traits"
+version = "0.2.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "578ede34cf02f8924ab9447f50c28075b4d3e5b269972345e7e0372b38c6cdcd"
+dependencies = [
+ "autocfg",
+ "libm",
+]
+
 [[package]]
 name = "num_cpus"
 version = "1.15.0"
@@ -1894,6 +1976,19 @@ dependencies = [
  "getrandom",
 ]
 
+[[package]]
+name = "ratatui"
+version = "0.20.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dcc0d032bccba900ee32151ec0265667535c230169f5a011154cdcd984e16829"
+dependencies = [
+ "bitflags",
+ "cassowary",
+ "crossterm",
+ "unicode-segmentation",
+ "unicode-width",
+]
+
 [[package]]
 name = "raw-cpuid"
 version = "10.7.0"
@@ -2063,6 +2158,15 @@ dependencies = [
  "walkdir",
 ]
 
+[[package]]
+name = "rustc_version"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bfa0f585226d2e68097d4f95d113b15b83a82e819ab25717ec0590d9584ef366"
+dependencies = [
+ "semver",
+]
+
 [[package]]
 name = "rustix"
 version = "0.37.11"
@@ -2136,6 +2240,12 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "semver"
+version = "1.0.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bebd363326d05ec3e2f532ab7660680f3b02130d780c299bca73469d521bc0ed"
+
 [[package]]
 name = "serde"
 version = "1.0.160"
@@ -2228,6 +2338,27 @@ dependencies = [
  "dirs",
 ]
 
+[[package]]
+name = "signal-hook"
+version = "0.3.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "732768f1176d21d09e076c23a93123d40bba92d50c4058da34d45c8de8e682b9"
+dependencies = [
+ "libc",
+ "signal-hook-registry",
+]
+
+[[package]]
+name = "signal-hook-mio"
+version = "0.2.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "29ad2e15f37ec9a6cc544097b78a1ec90001e9f71b81338ca39f430adaca99af"
+dependencies = [
+ "libc",
+ "mio",
+ "signal-hook",
+]
+
 [[package]]
 name = "signal-hook-registry"
 version = "1.4.1"
@@ -2345,6 +2476,20 @@ version = "0.1.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2047c6ded9c721764247e62cd3b03c09ffc529b2ba5b10ec482ae507a4a70160"
 
+[[package]]
+name = "sysinfo"
+version = "0.28.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b4c2f3ca6693feb29a89724516f016488e9aafc7f37264f898593ee4b942f31b"
+dependencies = [
+ "cfg-if",
+ "core-foundation-sys",
+ "libc",
+ "ntapi",
+ "once_cell",
+ "winapi",
+]
+
 [[package]]
 name = "tar"
 version = "0.4.38"
@@ -2369,9 +2514,28 @@ dependencies = [
  "windows-sys 0.45.0",
 ]
 
+[[package]]
+name = "text-generation-benchmark"
+version = "0.7.0-dev"
+dependencies = [
+ "average",
+ "clap",
+ "crossterm",
+ "float-ord",
+ "ratatui",
+ "serde",
+ "serde_json",
+ "text-generation-client",
+ "thiserror",
+ "tokenizers",
+ "tokio",
+ "tracing",
+ "tracing-subscriber",
+]
+
 [[package]]
 name = "text-generation-client"
-version = "0.6.0"
+version = "0.7.0-dev"
 dependencies = [
  "futures",
  "grpc-metadata",
@@ -2383,12 +2547,11 @@ dependencies = [
  "tonic-build",
  "tower",
  "tracing",
- "tracing-error",
 ]
 
 [[package]]
 name = "text-generation-launcher"
-version = "0.6.0"
+version = "0.7.0-dev"
 dependencies = [
  "clap",
  "ctrlc",
@@ -2399,11 +2562,12 @@ dependencies = [
  "subprocess",
  "tracing",
  "tracing-subscriber",
+ "vergen",
 ]
 
 [[package]]
 name = "text-generation-router"
-version = "0.6.0"
+version = "0.7.0-dev"
 dependencies = [
  "async-stream",
  "axum",
@@ -2764,16 +2928,6 @@ dependencies = [
  "valuable",
 ]
 
-[[package]]
-name = "tracing-error"
-version = "0.2.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d686ec1c0f384b1277f097b2f279a2ecc11afe8c133c1aabf036a27cb4cd206e"
-dependencies = [
- "tracing",
- "tracing-subscriber",
-]
-
 [[package]]
 name = "tracing-futures"
 version = "0.2.5"
@@ -2985,7 +3139,9 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c1b86a8af1dedf089b1c78338678e4c7492b6045649042d94faf19690499d236"
 dependencies = [
  "anyhow",
+ "rustc_version",
  "rustversion",
+ "sysinfo",
  "time",
 ]
 

Cargo.toml

@@ -1,13 +1,18 @@
 [workspace]
 members = [
+    "benchmark",
     "router",
     "router/client",
     "router/grpc-metadata",
     "launcher",
     "benchmark"
 ]
-exclude = [
+
-]
+[workspace.package]
+version = "0.7.0-dev"
+edition = "2021"
+authors = ["Olivier Dehaene"]
+homepage = "https://github.com/huggingface/text-generation-inference"
 
 [profile.release]
 debug = 1

Dockerfile

@@ -6,6 +6,7 @@ FROM chef as planner
 COPY Cargo.toml Cargo.toml
 COPY rust-toolchain.toml rust-toolchain.toml
 COPY proto proto
+COPY benchmark benchmark
 COPY router router
 COPY launcher launcher
 COPY benchmark benchmark
@@ -14,6 +15,7 @@ RUN cargo chef prepare --recipe-path recipe.json
 FROM chef AS builder
 
 ARG GIT_SHA
+ARG DOCKER_LABEL
 
 RUN PROTOC_ZIP=protoc-21.12-linux-x86_64.zip && \
     curl -OL https://github.com/protocolbuffers/protobuf/releases/download/v21.12/$PROTOC_ZIP && \
@@ -27,6 +29,7 @@ RUN cargo chef cook --release --recipe-path recipe.json
 COPY Cargo.toml Cargo.toml
 COPY rust-toolchain.toml rust-toolchain.toml
 COPY proto proto
+COPY benchmark benchmark
 COPY router router
 COPY launcher launcher
 COPY benchmark benchmark
@@ -107,7 +110,7 @@ COPY server/Makefile-transformers Makefile
 RUN BUILD_EXTENSIONS="True" make build-transformers
 
 # Text Generation Inference base image
-FROM debian:bullseye-slim as base
+FROM nvidia/cuda:11.8.0-base-ubuntu20.04 as base
 
 # Conda env
 ENV PATH=/opt/conda/bin:$PATH \
@@ -116,13 +119,8 @@ ENV PATH=/opt/conda/bin:$PATH \
 # Text Generation Inference base env
 ENV HUGGINGFACE_HUB_CACHE=/data \
     HF_HUB_ENABLE_HF_TRANSFER=1 \
-    MODEL_ID=bigscience/bloom-560m \
-    QUANTIZE=false \
-    NUM_SHARD=1 \
     PORT=80
 
-LABEL com.nvidia.volumes.needed="nvidia_driver"
-
 WORKDIR /usr/src
 
 RUN apt-get update && DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends \
@@ -159,6 +157,8 @@ RUN cd server && \
     pip install -r requirements.txt && \
     pip install ".[bnb, accelerate]" --no-cache-dir
 
+# Install benchmarker
+COPY --from=builder /usr/src/target/release/text-generation-benchmark /usr/local/bin/text-generation-benchmark
 # Install router
 COPY --from=builder /usr/src/target/release/text-generation-router /usr/local/bin/text-generation-router
 # Install launcher

Makefile

@@ -1,6 +1,9 @@
 install-server:
 	cd server && make install
 
+install-integration-tests:
+	cd integration-tests && pip install -r requirements.txt
+
 install-router:
 	cd router && cargo install --path .
 
@@ -18,11 +21,22 @@ server-dev:
 router-dev:
 	cd router && cargo run -- --port 8080
 
-integration-tests: install-router install-launcher
+rust-tests: install-router install-launcher
 	cargo test
 
-python-tests:
+integration-tests: install-integration-tests
-	cd server && HF_HUB_ENABLE_HF_TRANSFER=1 pytest tests
+	pytest -s -vv -m "not private" integration-tests
+
+update-integration-tests: install-integration-tests
+	pytest -s -vv --snapshot-update integration-tests
+
+python-server-tests:
+	HF_HUB_ENABLE_HF_TRANSFER=1 pytest -s -vv -m "not private" server/tests
+
+python-client-tests:
+	pytest clients/python/tests
+
+python-tests: python-server-tests python-client-tests
 
 run-bloom-560m:
 	text-generation-launcher --model-id bigscience/bloom-560m --num-shard 2 --port 8080

README.md

@@ -36,13 +36,14 @@ to power LLMs api-inference widgets.
   - [Quantization](#quantization)
 - [Develop](#develop)
 - [Testing](#testing)
-  
+
 ## Features
 
 - Serve the most popular Large Language Models with a simple launcher
 - Tensor Parallelism for faster inference on multiple GPUs
 - Token streaming using Server-Sent Events (SSE)
-- [Dynamic batching of incoming requests](https://github.com/huggingface/text-generation-inference/blob/main/router/src/batcher.rs#L88) for increased total throughput
+- [Continous batching of incoming requests](https://github.com/huggingface/text-generation-inference/tree/main/router) for increased total throughput
+- Optimized transformers code for inference using [flash-attention](https://github.com/HazyResearch/flash-attention) on the most popular architectures
 - Quantization with [bitsandbytes](https://github.com/TimDettmers/bitsandbytes)
 - [Safetensors](https://github.com/huggingface/safetensors) weight loading
 - Watermarking with [A Watermark for Large Language Models](https://arxiv.org/abs/2301.10226)
@@ -84,6 +85,11 @@ docker run --gpus all --shm-size 1g -p 8080:80 -v $volume:/data ghcr.io/huggingf
 ```
 **Note:** To use GPUs, you need to install the [NVIDIA Container Toolkit](https://docs.nvidia.com/datacenter/cloud-native/container-toolkit/install-guide.html). We also recommend using NVIDIA drivers with CUDA version 11.8 or higher.
 
+To see all options to serve your models (in the [code](https://github.com/huggingface/text-generation-inference/blob/main/launcher/src/main.rs) or in the cli:
+```
+text-generation-launcher --help
+```
+
 You can then query the model using either the `/generate` or `/generate_stream` routes:
 
 ```shell
@@ -131,7 +137,7 @@ by setting the address to an OTLP collector with the `--otlp-endpoint` argument.
 
 ### A note on Shared Memory (shm)
 
-[`NCCL`](https://docs.nvidia.com/deeplearning/nccl/user-guide/docs/index.html) is a communication framework used by 
+[`NCCL`](https://docs.nvidia.com/deeplearning/nccl/user-guide/docs/index.html) is a communication framework used by
 `PyTorch` to do distributed training/inference. `text-generation-inference` make
 use of `NCCL` to enable Tensor Parallelism to dramatically speed up inference for large language models.
 
@@ -152,14 +158,14 @@ creating a volume with:
 
 and mounting it to `/dev/shm`.
 
-Finally, you can also disable SHM sharing by using the `NCCL_SHM_DISABLE=1` environment variable. However, note that 
+Finally, you can also disable SHM sharing by using the `NCCL_SHM_DISABLE=1` environment variable. However, note that
 this will impact performance.
 
 ### Local install
 
-You can also opt to install `text-generation-inference` locally. 
+You can also opt to install `text-generation-inference` locally.
 
-First [install Rust](https://rustup.rs/) and create a Python virtual environment with at least 
+First [install Rust](https://rustup.rs/) and create a Python virtual environment with at least
 Python 3.9, e.g. using `conda`:
 
 ```shell
@@ -181,7 +187,7 @@ sudo unzip -o $PROTOC_ZIP -d /usr/local 'include/*'
 rm -f $PROTOC_ZIP
 ```
 
-On MacOS, using Homebrew: 
+On MacOS, using Homebrew:
 
 ```shell
 brew install protobuf
@@ -241,6 +247,13 @@ make router-dev
 ## Testing
 
 ```shell
+# python
+make python-server-tests
+make python-client-tests
+# or both server and client tests
 make python-tests
+# rust cargo tests
+make rust-tests
+# integration tests
 make integration-tests
 ```

benchmark/.gitignore

@@ -1 +0,0 @@
-target

benchmark/Cargo.toml

@@ -1,15 +1,10 @@
 [package]
 name = "text-generation-benchmark"
-version = "0.1.0"
-edition = "2021"
-authors = ["Olivier Dehaene"]
 description = "Text Generation Benchmarking tool"
-
+version.workspace = true
-[profile.release]
+edition.workspace = true
-debug = 1
+authors.workspace = true
-incremental = true
+homepage.workspace = true
-lto = "off"
-panic = "abort"
 
 [lib]
 path = "src/lib.rs"

benchmark/rust-toolchain.toml

@@ -1,3 +0,0 @@
-[toolchain]
-channel = "1.67.0"
-components = ["rustfmt", "clippy"]

benchmark/src/main.rs

@@ -5,7 +5,7 @@
 use clap::Parser;
 use std::path::Path;
 use text_generation_client::ShardedClient;
-use tokenizers::Tokenizer;
+use tokenizers::{FromPretrainedParameters, Tokenizer};
 use tracing_subscriber::layer::SubscriberExt;
 use tracing_subscriber::util::SubscriberInitExt;
 use tracing_subscriber::EnvFilter;
@@ -16,6 +16,8 @@ use tracing_subscriber::EnvFilter;
 struct Args {
     #[clap(short, long, env)]
     tokenizer_name: String,
+    #[clap(default_value = "main", long, env)]
+    revision: String,
     #[clap(short, long)]
     batch_size: Option<Vec<u32>>,
     #[clap(default_value = "10", short, long, env)]
@@ -36,6 +38,7 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
     // Pattern match configuration
     let Args {
         tokenizer_name,
+        revision,
         batch_size,
         sequence_length,
         decode_length,
@@ -59,10 +62,19 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
             tracing::info!("Found local tokenizer");
             Tokenizer::from_file(local_path.join("tokenizer.json")).unwrap()
         } else {
+            tracing::info!("Downloading tokenizer");
+
+            // Parse Huggingface hub token
+            let auth_token = std::env::var("HUGGING_FACE_HUB_TOKEN").ok();
+
             // Download and instantiate tokenizer
             // We need to download it outside of the Tokio runtime
-            tracing::info!("Downloading tokenizer");
+            let params = FromPretrainedParameters {
-            Tokenizer::from_pretrained(tokenizer_name.clone(), None).unwrap()
+                revision,
+                auth_token,
+                ..Default::default()
+            };
+            Tokenizer::from_pretrained(tokenizer_name.clone(), Some(params)).unwrap()
         };
     tracing::info!("Tokenizer loaded");
 

clients/python/pyproject.toml

@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "text-generation"
-version = "0.5.1"
+version = "0.5.2"
 description = "Hugging Face Text Generation Python Client"
 license = "Apache-2.0"
 authors = ["Olivier Dehaene <olivier@huggingface.co>"]
@@ -21,6 +21,9 @@ pytest = "^6.2.5"
 pytest-asyncio = "^0.17.2"
 pytest-cov = "^3.0.0"
 
+[tool.pytest.ini_options]
+asyncio_mode = "auto"
+
 [build-system]
-requires = ["poetry-core"]
+requires = ["poetry-core>=1.0.0"]
 build-backend = "poetry.core.masonry.api"

clients/python/tests/test_client.py

@@ -16,9 +16,9 @@ def test_generate(flan_t5_xxl_url, hf_headers):
     assert len(response.details.prefill) == 1
     assert response.details.prefill[0] == PrefillToken(id=0, text="<pad>", logprob=None)
     assert len(response.details.tokens) == 1
-    assert response.details.tokens[0] == Token(
+    assert response.details.tokens[0].id == 3
-        id=3, text="", logprob=-1.984375, special=False
+    assert response.details.tokens[0].text == ""
-    )
+    assert not response.details.tokens[0].special
 
 
 def test_generate_best_of(flan_t5_xxl_url, hf_headers):
@@ -82,10 +82,23 @@ async def test_generate_async(flan_t5_xxl_url, hf_headers):
     assert len(response.details.prefill) == 1
     assert response.details.prefill[0] == PrefillToken(id=0, text="<pad>", logprob=None)
     assert len(response.details.tokens) == 1
-    assert response.details.tokens[0] == Token(
+    assert response.details.tokens[0].id == 3
-        id=3, text="", logprob=-1.984375, special=False
+    assert response.details.tokens[0].text == ""
+    assert not response.details.tokens[0].special
+
+
+@pytest.mark.asyncio
+async def test_generate_async_best_of(flan_t5_xxl_url, hf_headers):
+    client = AsyncClient(flan_t5_xxl_url, hf_headers)
+    response = await client.generate(
+        "test", max_new_tokens=1, best_of=2, do_sample=True
     )
 
+    assert response.details.seed is not None
+    assert response.details.best_of_sequences is not None
+    assert len(response.details.best_of_sequences) == 1
+    assert response.details.best_of_sequences[0].seed is not None
+
 
 @pytest.mark.asyncio
 async def test_generate_async_not_found(fake_url, hf_headers):

clients/python/text_generation/types.py

@@ -154,7 +154,7 @@ class Token(BaseModel):
 
 
 # Generation finish reason
-class FinishReason(Enum):
+class FinishReason(str, Enum):
     # number of generated tokens == `max_new_tokens`
     Length = "length"
     # the model generated its end of sequence token

docs/openapi.json

@@ -10,7 +10,7 @@
       "name": "Apache 2.0",
       "url": "https://www.apache.org/licenses/LICENSE-2.0"
     },
-    "version": "0.6.0"
+    "version": "0.7.0-dev"
   },
   "paths": {
     "/": {
@@ -33,7 +33,19 @@
         },
         "responses": {
           "200": {
-            "description": "See /generate or /generate_stream"
+            "description": "Generated Text",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/GenerateResponse"
+                }
+              },
+              "text/event-stream": {
+                "schema": {
+                  "$ref": "#/components/schemas/StreamResponse"
+                }
+              }
+            }
           },
           "422": {
             "description": "Input validation error",
@@ -584,11 +596,73 @@
         "type": "object",
         "required": [
           "model_id",
+          "model_dtype",
+          "model_device_type",
+          "max_concurrent_requests",
+          "max_best_of",
+          "max_stop_sequences",
+          "max_input_length",
+          "max_total_tokens",
+          "waiting_served_ratio",
+          "max_batch_total_tokens",
+          "max_waiting_tokens",
+          "validation_workers",
           "version"
         ],
         "properties": {
+          "docker_label": {
+            "type": "string",
+            "example": "null",
+            "nullable": true
+          },
+          "max_batch_total_tokens": {
+            "type": "integer",
+            "format": "int32",
+            "example": "32000",
+            "minimum": 0.0
+          },
+          "max_best_of": {
+            "type": "integer",
+            "example": "2",
+            "minimum": 0.0
+          },
+          "max_concurrent_requests": {
+            "type": "integer",
+            "description": "Router Parameters",
+            "example": "128",
+            "minimum": 0.0
+          },
+          "max_input_length": {
+            "type": "integer",
+            "example": "1024",
+            "minimum": 0.0
+          },
+          "max_stop_sequences": {
+            "type": "integer",
+            "example": "4",
+            "minimum": 0.0
+          },
+          "max_total_tokens": {
+            "type": "integer",
+            "example": "2048",
+            "minimum": 0.0
+          },
+          "max_waiting_tokens": {
+            "type": "integer",
+            "example": "20",
+            "minimum": 0.0
+          },
+          "model_device_type": {
+            "type": "string",
+            "example": "cuda"
+          },
+          "model_dtype": {
+            "type": "string",
+            "example": "torch.float16"
+          },
           "model_id": {
             "type": "string",
+            "description": "Model info",
             "example": "bigscience/blomm-560m"
           },
           "model_pipeline_tag": {
@@ -606,9 +680,20 @@
             "example": "null",
             "nullable": true
           },
+          "validation_workers": {
+            "type": "integer",
+            "example": "2",
+            "minimum": 0.0
+          },
           "version": {
             "type": "string",
+            "description": "Router Info",
             "example": "0.5.0"
+          },
+          "waiting_served_ratio": {
+            "type": "number",
+            "format": "float",
+            "example": "1.2"
           }
         }
       },

integration-tests/conftest.py

@@ -0,0 +1,325 @@
+import sys
+import subprocess
+import contextlib
+import pytest
+import asyncio
+import os
+import docker
+import json
+import math
+import time
+import random
+
+from docker.errors import NotFound
+from typing import Optional, List, Dict
+from syrupy.extensions.json import JSONSnapshotExtension
+from aiohttp import ClientConnectorError, ClientOSError, ServerDisconnectedError
+
+from text_generation import AsyncClient
+from text_generation.types import Response, Details, PrefillToken, Token, BestOfSequence
+
+DOCKER_IMAGE = os.getenv("DOCKER_IMAGE", None)
+HUGGING_FACE_HUB_TOKEN = os.getenv("HUGGING_FACE_HUB_TOKEN", None)
+DOCKER_VOLUME = os.getenv("DOCKER_VOLUME", "/data")
+
+
+class ResponseComparator(JSONSnapshotExtension):
+    def serialize(
+        self,
+        data,
+        *,
+        exclude=None,
+        matcher=None,
+    ):
+        if isinstance(data, List):
+            data = [d.dict() for d in data]
+
+        data = self._filter(
+            data=data, depth=0, path=(), exclude=exclude, matcher=matcher
+        )
+        return json.dumps(data, indent=2, ensure_ascii=False, sort_keys=False) + "\n"
+
+    def matches(
+        self,
+        *,
+        serialized_data,
+        snapshot_data,
+    ) -> bool:
+        def convert_data(data):
+            data = json.loads(data)
+
+            if isinstance(data, Dict):
+                return Response(**data)
+            if isinstance(data, List):
+                return [Response(**d) for d in data]
+            raise NotImplementedError
+
+        def eq_token(token: Token, other: Token) -> bool:
+            return (
+                token.id == other.id
+                and token.text == other.text
+                and math.isclose(token.logprob, other.logprob, rel_tol=0.2)
+                and token.special == other.special
+            )
+
+        def eq_prefill_token(prefill_token: PrefillToken, other: PrefillToken) -> bool:
+            try:
+                return (
+                    prefill_token.id == other.id
+                    and prefill_token.text == other.text
+                    and (
+                        math.isclose(prefill_token.logprob, other.logprob, rel_tol=0.2)
+                        if prefill_token.logprob is not None
+                        else prefill_token.logprob == other.logprob
+                    )
+                )
+            except TypeError:
+                return False
+
+        def eq_best_of(details: BestOfSequence, other: BestOfSequence) -> bool:
+            return (
+                details.finish_reason == other.finish_reason
+                and details.generated_tokens == other.generated_tokens
+                and details.seed == other.seed
+                and len(details.prefill) == len(other.prefill)
+                and all(
+                    [
+                        eq_prefill_token(d, o)
+                        for d, o in zip(details.prefill, other.prefill)
+                    ]
+                )
+                and len(details.tokens) == len(other.tokens)
+                and all([eq_token(d, o) for d, o in zip(details.tokens, other.tokens)])
+            )
+
+        def eq_details(details: Details, other: Details) -> bool:
+            return (
+                details.finish_reason == other.finish_reason
+                and details.generated_tokens == other.generated_tokens
+                and details.seed == other.seed
+                and len(details.prefill) == len(other.prefill)
+                and all(
+                    [
+                        eq_prefill_token(d, o)
+                        for d, o in zip(details.prefill, other.prefill)
+                    ]
+                )
+                and len(details.tokens) == len(other.tokens)
+                and all([eq_token(d, o) for d, o in zip(details.tokens, other.tokens)])
+                and (
+                    len(details.best_of_sequences)
+                    if details.best_of_sequences is not None
+                    else 0
+                )
+                == (
+                    len(other.best_of_sequences)
+                    if other.best_of_sequences is not None
+                    else 0
+                )
+                and (
+                    all(
+                        [
+                            eq_best_of(d, o)
+                            for d, o in zip(
+                                details.best_of_sequences, other.best_of_sequences
+                            )
+                        ]
+                    )
+                    if details.best_of_sequences is not None
+                    else details.best_of_sequences == other.best_of_sequences
+                )
+            )
+
+        def eq_response(response: Response, other: Response) -> bool:
+            return response.generated_text == other.generated_text and eq_details(
+                response.details, other.details
+            )
+
+        serialized_data = convert_data(serialized_data)
+        snapshot_data = convert_data(snapshot_data)
+
+        if not isinstance(serialized_data, List):
+            serialized_data = [serialized_data]
+        if not isinstance(snapshot_data, List):
+            snapshot_data = [snapshot_data]
+
+        return len(snapshot_data) == len(serialized_data) and all(
+            [eq_response(r, o) for r, o in zip(serialized_data, snapshot_data)]
+        )
+
+
+class LauncherHandle:
+    def __init__(self, port: int):
+        self.client = AsyncClient(f"http://localhost:{port}")
+
+    def _inner_health(self):
+        raise NotImplementedError
+
+    async def health(self, timeout: int = 60):
+        assert timeout > 0
+        for _ in range(timeout):
+            if not self._inner_health():
+                raise RuntimeError("Launcher crashed")
+
+            try:
+                await self.client.generate("test")
+                return
+            except (ClientConnectorError, ClientOSError, ServerDisconnectedError) as e:
+                time.sleep(1)
+        raise RuntimeError("Health check failed")
+
+
+class ContainerLauncherHandle(LauncherHandle):
+    def __init__(self, docker_client, container_name, port: int):
+        super(ContainerLauncherHandle, self).__init__(port)
+        self.docker_client = docker_client
+        self.container_name = container_name
+
+    def _inner_health(self) -> bool:
+        container = self.docker_client.containers.get(self.container_name)
+        return container.status in ["running", "created"]
+
+
+class ProcessLauncherHandle(LauncherHandle):
+    def __init__(self, process, port: int):
+        super(ProcessLauncherHandle, self).__init__(port)
+        self.process = process
+
+    def _inner_health(self) -> bool:
+        return self.process.poll() is None
+
+
+@pytest.fixture
+def response_snapshot(snapshot):
+    return snapshot.use_extension(ResponseComparator)
+
+
+@pytest.fixture(scope="module")
+def event_loop():
+    loop = asyncio.get_event_loop()
+    yield loop
+    loop.close()
+
+
+@pytest.fixture(scope="module")
+def launcher(event_loop):
+    @contextlib.contextmanager
+    def local_launcher(
+        model_id: str, num_shard: Optional[int] = None, quantize: Optional[str] = None
+    ):
+        port = random.randint(8000, 10_000)
+        master_port = random.randint(10_000, 20_000)
+
+        shard_uds_path = (
+            f"/tmp/tgi-tests-{model_id.split('/')[-1]}-{num_shard}-{quantize}-server"
+        )
+
+        args = [
+            "text-generation-launcher",
+            "--model-id",
+            model_id,
+            "--port",
+            str(port),
+            "--master-port",
+            str(master_port),
+            "--shard-uds-path",
+            shard_uds_path,
+        ]
+
+        if num_shard is not None:
+            args.extend(["--num-shard", str(num_shard)])
+        if quantize:
+            args.append("--quantize")
+
+        with subprocess.Popen(
+            args, stdout=subprocess.PIPE, stderr=subprocess.PIPE
+        ) as process:
+            yield ProcessLauncherHandle(process, port)
+
+            process.terminate()
+            process.wait(60)
+
+            launcher_output = process.stdout.read().decode("utf-8")
+            print(launcher_output, file=sys.stderr)
+
+            process.stdout.close()
+            process.stderr.close()
+
+    @contextlib.contextmanager
+    def docker_launcher(
+        model_id: str, num_shard: Optional[int] = None, quantize: Optional[str] = None
+    ):
+        port = random.randint(8000, 10_000)
+
+        args = ["--model-id", model_id, "--env"]
+
+        if num_shard is not None:
+            args.extend(["--num-shard", str(num_shard)])
+        if quantize:
+            args.append("--quantize")
+
+        client = docker.from_env()
+
+        container_name = f"tgi-tests-{model_id.split('/')[-1]}-{num_shard}-{quantize}"
+
+        try:
+            container = client.containers.get(container_name)
+            container.stop()
+            container.wait()
+        except NotFound:
+            pass
+
+        gpu_count = num_shard if num_shard is not None else 1
+
+        env = {}
+        if HUGGING_FACE_HUB_TOKEN is not None:
+            env["HUGGING_FACE_HUB_TOKEN"] = HUGGING_FACE_HUB_TOKEN
+
+        volumes = []
+        if DOCKER_VOLUME:
+            volumes = [f"{DOCKER_VOLUME}:/data"]
+
+        container = client.containers.run(
+            DOCKER_IMAGE,
+            command=args,
+            name=container_name,
+            environment=env,
+            auto_remove=False,
+            detach=True,
+            device_requests=[
+                docker.types.DeviceRequest(count=gpu_count, capabilities=[["gpu"]])
+            ],
+            volumes=volumes,
+            ports={"80/tcp": port},
+        )
+
+        yield ContainerLauncherHandle(client, container.name, port)
+
+        try:
+            container.stop()
+            container.wait()
+        except NotFound:
+            pass
+
+        container_output = container.logs().decode("utf-8")
+        print(container_output, file=sys.stderr)
+
+        container.remove()
+
+    if DOCKER_IMAGE is not None:
+        return docker_launcher
+    return local_launcher
+
+
+@pytest.fixture(scope="module")
+def generate_load():
+    async def generate_load_inner(
+        client: AsyncClient, prompt: str, max_new_tokens: int, n: int
+    ) -> List[Response]:
+        futures = [
+            client.generate(prompt, max_new_tokens=max_new_tokens) for _ in range(n)
+        ]
+
+        return await asyncio.gather(*futures)
+
+    return generate_load_inner

integration-tests/models/__snapshots__/test_bloom_560m/test_bloom_560m.json

@@ -0,0 +1,128 @@
+{
+  "details": {
+    "best_of_sequences": null,
+    "finish_reason": "length",
+    "generated_tokens": 10,
+    "prefill": [
+      {
+        "id": 17934,
+        "logprob": null,
+        "text": "Pour"
+      },
+      {
+        "id": 49833,
+        "logprob": -10.5625,
+        "text": " dég"
+      },
+      {
+        "id": 21543,
+        "logprob": -0.14770508,
+        "text": "uster"
+      },
+      {
+        "id": 447,
+        "logprob": -1.9287109,
+        "text": " un"
+      },
+      {
+        "id": 46341,
+        "logprob": -15.4609375,
+        "text": " ort"
+      },
+      {
+        "id": 35567,
+        "logprob": -7.5585938,
+        "text": "olan"
+      },
+      {
+        "id": 15,
+        "logprob": -1.4003906,
+        "text": ","
+      },
+      {
+        "id": 1669,
+        "logprob": -1.5673828,
+        "text": " il"
+      },
+      {
+        "id": 11580,
+        "logprob": -0.94628906,
+        "text": " faut"
+      },
+      {
+        "id": 3913,
+        "logprob": -3.703125,
+        "text": " tout"
+      },
+      {
+        "id": 39261,
+        "logprob": -1.5732422,
+        "text": " d'abord"
+      }
+    ],
+    "seed": 0,
+    "tokens": [
+      {
+        "id": 578,
+        "logprob": -1.6591797,
+        "special": false,
+        "text": " le"
+      },
+      {
+        "id": 5608,
+        "logprob": -2.4492188,
+        "special": false,
+        "text": " faire"
+      },
+      {
+        "id": 159570,
+        "logprob": -6.6835938,
+        "special": false,
+        "text": " réch"
+      },
+      {
+        "id": 810,
+        "logprob": 0.0,
+        "special": false,
+        "text": "au"
+      },
+      {
+        "id": 12736,
+        "logprob": 0.0,
+        "special": false,
+        "text": "ffer"
+      },
+      {
+        "id": 1742,
+        "logprob": -2.5175781,
+        "special": false,
+        "text": " au"
+      },
+      {
+        "id": 6105,
+        "logprob": -2.0078125,
+        "special": false,
+        "text": " bain"
+      },
+      {
+        "id": 88254,
+        "logprob": -0.12695312,
+        "special": false,
+        "text": "-mar"
+      },
+      {
+        "id": 641,
+        "logprob": 0.0,
+        "special": false,
+        "text": "ie"
+      },
+      {
+        "id": 2940,
+        "logprob": -3.5175781,
+        "special": false,
+        "text": " avec"
+      }
+    ]
+  },
+  "generated_text": " le faire réchauffer au bain-marie avec"
+}

integration-tests/models/__snapshots__/test_bloom_560m/test_bloom_560m_all_params.json

@@ -0,0 +1,98 @@
+{
+  "details": {
+    "best_of_sequences": null,
+    "finish_reason": "length",
+    "generated_tokens": 10,
+    "prefill": [
+      {
+        "id": 15,
+        "logprob": null,
+        "text": ","
+      },
+      {
+        "id": 1669,
+        "logprob": -5.4414062,
+        "text": " il"
+      },
+      {
+        "id": 11580,
+        "logprob": -2.3378906,
+        "text": " faut"
+      },
+      {
+        "id": 3913,
+        "logprob": -4.3554688,
+        "text": " tout"
+      },
+      {
+        "id": 39261,
+        "logprob": -2.9238281,
+        "text": " d'abord"
+      }
+    ],
+    "seed": 0,
+    "tokens": [
+      {
+        "id": 408,
+        "logprob": -1.9267578,
+        "special": false,
+        "text": " que"
+      },
+      {
+        "id": 20288,
+        "logprob": -2.9257812,
+        "special": false,
+        "text": " l'on"
+      },
+      {
+        "id": 22255,
+        "logprob": -2.8964844,
+        "special": false,
+        "text": " trouve"
+      },
+      {
+        "id": 1622,
+        "logprob": -1.1083984,
+        "special": false,
+        "text": " une"
+      },
+      {
+        "id": 187079,
+        "logprob": -7.796875,
+        "special": false,
+        "text": " posture"
+      },
+      {
+        "id": 501,
+        "logprob": -5.390625,
+        "special": false,
+        "text": " par"
+      },
+      {
+        "id": 8741,
+        "logprob": -0.34936523,
+        "special": false,
+        "text": " rapport"
+      },
+      {
+        "id": 693,
+        "logprob": 0.0,
+        "special": false,
+        "text": " à"
+      },
+      {
+        "id": 366,
+        "logprob": -2.3378906,
+        "special": false,
+        "text": " la"
+      },
+      {
+        "id": 36503,
+        "logprob": -3.6640625,
+        "special": false,
+        "text": " pratique"
+      }
+    ]
+  },
+  "generated_text": "Pour déguster un ortolan, il faut tout d'abord que l'on trouve une posture par rapport à la pratique"
+}

integration-tests/models/__snapshots__/test_bloom_560m/test_bloom_560m_load.json

@@ -0,0 +1,514 @@
+[
+  {
+    "details": {
+      "best_of_sequences": null,
+      "finish_reason": "length",
+      "generated_tokens": 10,
+      "prefill": [
+        {
+          "id": 17934,
+          "logprob": null,
+          "text": "Pour"
+        },
+        {
+          "id": 49833,
+          "logprob": -10.5625,
+          "text": " dég"
+        },
+        {
+          "id": 21543,
+          "logprob": -0.14770508,
+          "text": "uster"
+        },
+        {
+          "id": 447,
+          "logprob": -1.9287109,
+          "text": " un"
+        },
+        {
+          "id": 46341,
+          "logprob": -15.4609375,
+          "text": " ort"
+        },
+        {
+          "id": 35567,
+          "logprob": -7.5585938,
+          "text": "olan"
+        },
+        {
+          "id": 15,
+          "logprob": -1.4003906,
+          "text": ","
+        },
+        {
+          "id": 1669,
+          "logprob": -1.5673828,
+          "text": " il"
+        },
+        {
+          "id": 11580,
+          "logprob": -0.94628906,
+          "text": " faut"
+        },
+        {
+          "id": 3913,
+          "logprob": -3.703125,
+          "text": " tout"
+        },
+        {
+          "id": 39261,
+          "logprob": -1.5732422,
+          "text": " d'abord"
+        }
+      ],
+      "seed": null,
+      "tokens": [
+        {
+          "id": 578,
+          "logprob": -1.7646484,
+          "special": false,
+          "text": " le"
+        },
+        {
+          "id": 5608,
+          "logprob": -2.6113281,
+          "special": false,
+          "text": " faire"
+        },
+        {
+          "id": 1767,
+          "logprob": -1.5263672,
+          "special": false,
+          "text": " cu"
+        },
+        {
+          "id": 1273,
+          "logprob": -0.00010049343,
+          "special": false,
+          "text": "ire"
+        },
+        {
+          "id": 1486,
+          "logprob": -1.4707031,
+          "special": false,
+          "text": " dans"
+        },
+        {
+          "id": 283,
+          "logprob": -1.2119141,
+          "special": false,
+          "text": " de"
+        },
+        {
+          "id": 40410,
+          "logprob": -0.11883545,
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+          "text": " l'eau"
+        },
+        {
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+          "logprob": -0.40844727,
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+        },
+        {
+          "id": 172483,
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+        },
+        {
+          "id": 2805,
+          "logprob": -1.0195312,
+          "special": false,
+          "text": " sal"
+        }
+      ]
+    },
+    "generated_text": " le faire cuire dans de l'eau bouillante sal"
+  },
+  {
+    "details": {
+      "best_of_sequences": null,
+      "finish_reason": "length",
+      "generated_tokens": 10,
+      "prefill": [
+        {
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+          "logprob": null,
+          "text": "Pour"
+        },
+        {
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+        },
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+          "id": 21543,
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+        },
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+        },
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+          "text": " ort"
+        },
+        {
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+          "logprob": -7.5234375,
+          "text": "olan"
+        },
+        {
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+          "logprob": -1.3613281,
+          "text": ","
+        },
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+        },
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+        },
+        {
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+        },
+        {
+          "id": 39261,
+          "logprob": -1.5732422,
+          "text": " d'abord"
+        }
+      ],
+      "seed": null,
+      "tokens": [
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+        },
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+        },
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+        },
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+      ]
+    },
+    "generated_text": " le faire cuire dans de l'eau bouillante sal"
+  },
+  {
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+      "finish_reason": "length",
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+        },
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+        },
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+        },
+        {
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+        },
+        {
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+          "logprob": -1.5732422,
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+        }
+      ],
+      "seed": null,
+      "tokens": [
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+          "logprob": -0.4506836,
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+          "id": 2805,
+          "logprob": -1.0185547,
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+          "text": " sal"
+        }
+      ]
+    },
+    "generated_text": " le faire cuire dans de l'eau bouillante sal"
+  },
+  {
+    "details": {
+      "best_of_sequences": null,
+      "finish_reason": "length",
+      "generated_tokens": 10,
+      "prefill": [
+        {
+          "id": 17934,
+          "logprob": null,
+          "text": "Pour"
+        },
+        {
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+          "text": " dég"
+        },
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+        },
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+        },
+        {
+          "id": 15,
+          "logprob": -1.3613281,
+          "text": ","
+        },
+        {
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+          "logprob": -1.5458984,
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+        },
+        {
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+        },
+        {
+          "id": 3913,
+          "logprob": -3.7011719,
+          "text": " tout"
+        },
+        {
+          "id": 39261,
+          "logprob": -1.5732422,
+          "text": " d'abord"
+        }
+      ],
+      "seed": null,
+      "tokens": [
+        {
+          "id": 578,
+          "logprob": -1.7548828,
+          "special": false,
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+        },
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+          "special": false,
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integration-tests/models/__snapshots__/test_bloom_560m_sharded/test_bloom_560m_sharded.json

@@ -0,0 +1,128 @@
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+}

integration-tests/models/__snapshots__/test_bloom_560m_sharded/test_bloom_560m_sharded_load.json

@@ -0,0 +1,514 @@
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integration-tests/models/__snapshots__/test_flash_llama/test_flash_llama.json

@@ -0,0 +1,88 @@
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+}

integration-tests/models/__snapshots__/test_flash_llama/test_flash_llama_all_params.json

@@ -0,0 +1,88 @@
+{
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+  "generated_text": "Test requestfailed for IP Address: 'None'.\nas"
+}

integration-tests/models/__snapshots__/test_flash_llama/test_flash_llama_load.json

@@ -0,0 +1,354 @@
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+          "text": "<|endoftext|>"
+        },
+        {
+          "id": 50281,
+          "logprob": -18.265625,
+          "text": "<|assistant|>"
+        }
+      ],
+      "seed": null,
+      "tokens": [
+        {
+          "id": 510,
+          "logprob": -0.63183594,
+          "special": false,
+          "text": "The"
+        },
+        {
+          "id": 3159,
+          "logprob": -0.5488281,
+          "special": false,
+          "text": " word"
+        },
+        {
+          "id": 346,
+          "logprob": -0.045684814,
+          "special": false,
+          "text": " \""
+        },
+        {
+          "id": 6441,
+          "logprob": -0.00207901,
+          "special": false,
+          "text": "mem"
+        },
+        {
+          "id": 70,
+          "logprob": -1.335144e-05,
+          "special": false,
+          "text": "e"
+        },
+        {
+          "id": 3,
+          "logprob": -0.00097227097,
+          "special": false,
+          "text": "\""
+        },
+        {
+          "id": 369,
+          "logprob": -0.0892334,
+          "special": false,
+          "text": " was"
+        },
+        {
+          "id": 806,
+          "logprob": -0.12463379,
+          "special": false,
+          "text": " first"
+        },
+        {
+          "id": 908,
+          "logprob": -0.01737976,
+          "special": false,
+          "text": " used"
+        },
+        {
+          "id": 275,
+          "logprob": -0.50341797,
+          "special": false,
+          "text": " in"
+        }
+      ]
+    },
+    "generated_text": "The word \"meme\" was first used in"
+  },
+  {
+    "details": {
+      "best_of_sequences": null,
+      "finish_reason": "length",
+      "generated_tokens": 10,
+      "prefill": [
+        {
+          "id": 50278,
+          "logprob": null,
+          "text": "<|prompter|>"
+        },
+        {
+          "id": 1276,
+          "logprob": -8.03125,
+          "text": "What"
+        },
+        {
+          "id": 310,
+          "logprob": -5.421875,
+          "text": " is"
+        },
+        {
+          "id": 247,
+          "logprob": -2.1601562,
+          "text": " a"
+        },
+        {
+          "id": 1167,
+          "logprob": -5.4609375,
+          "text": " mem"
+        },
+        {
+          "id": 70,
+          "logprob": -0.005657196,
+          "text": "e"
+        },
+        {
+          "id": 13,
+          "logprob": -7.28125,
+          "text": ","
+        },
+        {
+          "id": 285,
+          "logprob": -0.2980957,
+          "text": " and"
+        },
+        {
+          "id": 752,
+          "logprob": -2.1679688,
+          "text": " what"
+        },
+        {
+          "id": 434,
+          "logprob": -5.6210938,
+          "text": "'s"
+        },
+        {
+          "id": 253,
+          "logprob": -0.81103516,
+          "text": " the"
+        },
+        {
+          "id": 2892,
+          "logprob": -6.6640625,
+          "text": " history"
+        },
+        {
+          "id": 3212,
+          "logprob": -2.265625,
+          "text": " behind"
+        },
+        {
+          "id": 436,
+          "logprob": -11.5078125,
+          "text": " this"
+        },
+        {
+          "id": 3159,
+          "logprob": -2.1582031,
+          "text": " word"
+        },
+        {
+          "id": 32,
+          "logprob": -0.008720398,
+          "text": "?"
+        },
+        {
+          "id": 0,
+          "logprob": -2.4726562,
+          "text": "<|endoftext|>"
+        },
+        {
+          "id": 50281,
+          "logprob": -18.265625,
+          "text": "<|assistant|>"
+        }
+      ],
+      "seed": null,
+      "tokens": [
+        {
+          "id": 510,
+          "logprob": -0.63183594,
+          "special": false,
+          "text": "The"
+        },
+        {
+          "id": 3159,
+          "logprob": -0.5488281,
+          "special": false,
+          "text": " word"
+        },
+        {
+          "id": 346,
+          "logprob": -0.045684814,
+          "special": false,
+          "text": " \""
+        },
+        {
+          "id": 6441,
+          "logprob": -0.00207901,
+          "special": false,
+          "text": "mem"
+        },
+        {
+          "id": 70,
+          "logprob": -1.335144e-05,
+          "special": false,
+          "text": "e"
+        },
+        {
+          "id": 3,
+          "logprob": -0.00097227097,
+          "special": false,
+          "text": "\""
+        },
+        {
+          "id": 369,
+          "logprob": -0.0892334,
+          "special": false,
+          "text": " was"
+        },
+        {
+          "id": 806,
+          "logprob": -0.12463379,
+          "special": false,
+          "text": " first"
+        },
+        {
+          "id": 908,
+          "logprob": -0.01737976,
+          "special": false,
+          "text": " used"
+        },
+        {
+          "id": 275,
+          "logprob": -0.50341797,
+          "special": false,
+          "text": " in"
+        }
+      ]
+    },
+    "generated_text": "The word \"meme\" was first used in"
+  }
+]

integration-tests/models/__snapshots__/test_flash_santacoder/test_flash_santacoder.json

@@ -0,0 +1,93 @@
+{
+  "details": {
+    "best_of_sequences": null,
+    "finish_reason": "length",
+    "generated_tokens": 10,
+    "prefill": [
+      {
+        "id": 563,
+        "logprob": null,
+        "text": "def"
+      },
+      {
+        "id": 942,
+        "logprob": -5.1367188,
+        "text": " print"
+      },
+      {
+        "id": 62,
+        "logprob": -0.24450684,
+        "text": "_"
+      },
+      {
+        "id": 7196,
+        "logprob": -6.9609375,
+        "text": "hello"
+      }
+    ],
+    "seed": null,
+    "tokens": [
+      {
+        "id": 1241,
+        "logprob": -0.9863281,
+        "special": false,
+        "text": "():"
+      },
+      {
+        "id": 258,
+        "logprob": -0.21447754,
+        "special": false,
+        "text": "\n   "
+      },
+      {
+        "id": 942,
+        "logprob": -0.43701172,
+        "special": false,
+        "text": " print"
+      },
+      {
+        "id": 372,
+        "logprob": -0.5361328,
+        "special": false,
+        "text": "(\""
+      },
+      {
+        "id": 7371,
+        "logprob": -0.44555664,
+        "special": false,
+        "text": "Hello"
+      },
+      {
+        "id": 9956,
+        "logprob": -1.2412109,
+        "special": false,
+        "text": " World"
+      },
+      {
+        "id": 8657,
+        "logprob": -0.7583008,
+        "special": false,
+        "text": "!\")"
+      },
+      {
+        "id": 185,
+        "logprob": -0.76171875,
+        "special": false,
+        "text": "\n"
+      },
+      {
+        "id": 185,
+        "logprob": -0.20837402,
+        "special": false,
+        "text": "\n"
+      },
+      {
+        "id": 1018,
+        "logprob": -1.2470703,
+        "special": false,
+        "text": "print"
+      }
+    ]
+  },
+  "generated_text": "():\n    print(\"Hello World!\")\n\nprint"
+}

integration-tests/models/__snapshots__/test_flash_santacoder/test_flash_santacoder_load.json

@@ -0,0 +1,374 @@
+[
+  {
+    "details": {
+      "best_of_sequences": null,
+      "finish_reason": "length",
+      "generated_tokens": 10,
+      "prefill": [
+        {
+          "id": 563,
+          "logprob": null,
+          "text": "def"
+        },
+        {
+          "id": 942,
+          "logprob": -5.1367188,
+          "text": " print"
+        },
+        {
+          "id": 62,
+          "logprob": -0.24450684,
+          "text": "_"
+        },
+        {
+          "id": 7196,
+          "logprob": -6.9609375,
+          "text": "hello"
+        }
+      ],
+      "seed": null,
+      "tokens": [
+        {
+          "id": 1241,
+          "logprob": -0.9863281,
+          "special": false,
+          "text": "():"
+        },
+        {
+          "id": 258,
+          "logprob": -0.21362305,
+          "special": false,
+          "text": "\n   "
+        },
+        {
+          "id": 942,
+          "logprob": -0.44360352,
+          "special": false,
+          "text": " print"
+        },
+        {
+          "id": 372,
+          "logprob": -0.54248047,
+          "special": false,
+          "text": "(\""
+        },
+        {
+          "id": 7371,
+          "logprob": -0.44555664,
+          "special": false,
+          "text": "Hello"
+        },
+        {
+          "id": 9956,
+          "logprob": -1.2441406,
+          "special": false,
+          "text": " World"
+        },
+        {
+          "id": 8657,
+          "logprob": -0.75878906,
+          "special": false,
+          "text": "!\")"
+        },
+        {
+          "id": 185,
+          "logprob": -0.76171875,
+          "special": false,
+          "text": "\n"
+        },
+        {
+          "id": 185,
+          "logprob": -0.2084961,
+          "special": false,
+          "text": "\n"
+        },
+        {
+          "id": 1018,
+          "logprob": -1.2460938,
+          "special": false,
+          "text": "print"
+        }
+      ]
+    },
+    "generated_text": "():\n    print(\"Hello World!\")\n\nprint"
+  },
+  {
+    "details": {
+      "best_of_sequences": null,
+      "finish_reason": "length",
+      "generated_tokens": 10,
+      "prefill": [
+        {
+          "id": 563,
+          "logprob": null,
+          "text": "def"
+        },
+        {
+          "id": 942,
+          "logprob": -5.1367188,
+          "text": " print"
+        },
+        {
+          "id": 62,
+          "logprob": -0.24450684,
+          "text": "_"
+        },
+        {
+          "id": 7196,
+          "logprob": -6.9609375,
+          "text": "hello"
+        }
+      ],
+      "seed": null,
+      "tokens": [
+        {
+          "id": 1241,
+          "logprob": -0.9863281,
+          "special": false,
+          "text": "():"
+        },
+        {
+          "id": 258,
+          "logprob": -0.21362305,
+          "special": false,
+          "text": "\n   "
+        },
+        {
+          "id": 942,
+          "logprob": -0.44360352,
+          "special": false,
+          "text": " print"
+        },
+        {
+          "id": 372,
+          "logprob": -0.54248047,
+          "special": false,
+          "text": "(\""
+        },
+        {
+          "id": 7371,
+          "logprob": -0.44555664,
+          "special": false,
+          "text": "Hello"
+        },
+        {
+          "id": 9956,
+          "logprob": -1.2441406,
+          "special": false,
+          "text": " World"
+        },
+        {
+          "id": 8657,
+          "logprob": -0.75878906,
+          "special": false,
+          "text": "!\")"
+        },
+        {
+          "id": 185,
+          "logprob": -0.76171875,
+          "special": false,
+          "text": "\n"
+        },
+        {
+          "id": 185,
+          "logprob": -0.2084961,
+          "special": false,
+          "text": "\n"
+        },
+        {
+          "id": 1018,
+          "logprob": -1.2460938,
+          "special": false,
+          "text": "print"
+        }
+      ]
+    },
+    "generated_text": "():\n    print(\"Hello World!\")\n\nprint"
+  },
+  {
+    "details": {
+      "best_of_sequences": null,
+      "finish_reason": "length",
+      "generated_tokens": 10,
+      "prefill": [
+        {
+          "id": 563,
+          "logprob": null,
+          "text": "def"
+        },
+        {
+          "id": 942,
+          "logprob": -5.1367188,
+          "text": " print"
+        },
+        {
+          "id": 62,
+          "logprob": -0.24450684,
+          "text": "_"
+        },
+        {
+          "id": 7196,
+          "logprob": -6.9609375,
+          "text": "hello"
+        }
+      ],
+      "seed": null,
+      "tokens": [
+        {
+          "id": 1241,
+          "logprob": -0.9863281,
+          "special": false,
+          "text": "():"
+        },
+        {
+          "id": 258,
+          "logprob": -0.21362305,
+          "special": false,
+          "text": "\n   "
+        },
+        {
+          "id": 942,
+          "logprob": -0.44360352,
+          "special": false,
+          "text": " print"
+        },
+        {
+          "id": 372,
+          "logprob": -0.54248047,
+          "special": false,
+          "text": "(\""
+        },
+        {
+          "id": 7371,
+          "logprob": -0.44555664,
+          "special": false,
+          "text": "Hello"
+        },
+        {
+          "id": 9956,
+          "logprob": -1.2441406,
+          "special": false,
+          "text": " World"
+        },
+        {
+          "id": 8657,
+          "logprob": -0.75878906,
+          "special": false,
+          "text": "!\")"
+        },
+        {
+          "id": 185,
+          "logprob": -0.76171875,
+          "special": false,
+          "text": "\n"
+        },
+        {
+          "id": 185,
+          "logprob": -0.2084961,
+          "special": false,
+          "text": "\n"
+        },
+        {
+          "id": 1018,
+          "logprob": -1.2460938,
+          "special": false,
+          "text": "print"
+        }
+      ]
+    },
+    "generated_text": "():\n    print(\"Hello World!\")\n\nprint"
+  },
+  {
+    "details": {
+      "best_of_sequences": null,
+      "finish_reason": "length",
+      "generated_tokens": 10,
+      "prefill": [
+        {
+          "id": 563,
+          "logprob": null,
+          "text": "def"
+        },
+        {
+          "id": 942,
+          "logprob": -5.1367188,
+          "text": " print"
+        },
+        {
+          "id": 62,
+          "logprob": -0.24450684,
+          "text": "_"
+        },
+        {
+          "id": 7196,
+          "logprob": -6.9609375,
+          "text": "hello"
+        }
+      ],
+      "seed": null,
+      "tokens": [
+        {
+          "id": 1241,
+          "logprob": -0.9863281,
+          "special": false,
+          "text": "():"
+        },
+        {
+          "id": 258,
+          "logprob": -0.21362305,
+          "special": false,
+          "text": "\n   "
+        },
+        {
+          "id": 942,
+          "logprob": -0.44360352,
+          "special": false,
+          "text": " print"
+        },
+        {
+          "id": 372,
+          "logprob": -0.54248047,
+          "special": false,
+          "text": "(\""
+        },
+        {
+          "id": 7371,
+          "logprob": -0.44555664,
+          "special": false,
+          "text": "Hello"
+        },
+        {
+          "id": 9956,
+          "logprob": -1.2441406,
+          "special": false,
+          "text": " World"
+        },
+        {
+          "id": 8657,
+          "logprob": -0.75878906,
+          "special": false,
+          "text": "!\")"
+        },
+        {
+          "id": 185,
+          "logprob": -0.76171875,
+          "special": false,
+          "text": "\n"
+        },
+        {
+          "id": 185,
+          "logprob": -0.2084961,
+          "special": false,
+          "text": "\n"
+        },
+        {
+          "id": 1018,
+          "logprob": -1.2460938,
+          "special": false,
+          "text": "print"
+        }
+      ]
+    },
+    "generated_text": "():\n    print(\"Hello World!\")\n\nprint"
+  }
+]

integration-tests/models/__snapshots__/test_flash_starcoder/test_flash_starcoder.json

@@ -0,0 +1,93 @@
+{
+  "details": {
+    "best_of_sequences": null,
+    "finish_reason": "length",
+    "generated_tokens": 10,
+    "prefill": [
+      {
+        "id": 589,
+        "logprob": null,
+        "text": "def"
+      },
+      {
+        "id": 1459,
+        "logprob": -5.6289062,
+        "text": " print"
+      },
+      {
+        "id": 81,
+        "logprob": -1.6005859,
+        "text": "_"
+      },
+      {
+        "id": 7656,
+        "logprob": -5.9921875,
+        "text": "hello"
+      }
+    ],
+    "seed": null,
+    "tokens": [
+      {
+        "id": 2262,
+        "logprob": -0.7705078,
+        "special": false,
+        "text": "():"
+      },
+      {
+        "id": 284,
+        "logprob": -0.2590332,
+        "special": false,
+        "text": "\n   "
+      },
+      {
+        "id": 1459,
+        "logprob": -0.39379883,
+        "special": false,
+        "text": " print"
+      },
+      {
+        "id": 440,
+        "logprob": -0.61376953,
+        "special": false,
+        "text": "(\""
+      },
+      {
+        "id": 8279,
+        "logprob": -0.47338867,
+        "special": false,
+        "text": "Hello"
+      },
+      {
+        "id": 10896,
+        "logprob": -1.5068359,
+        "special": false,
+        "text": " World"
+      },
+      {
+        "id": 657,
+        "logprob": -0.80810547,
+        "special": false,
+        "text": "\")"
+      },
+      {
+        "id": 203,
+        "logprob": -0.7397461,
+        "special": false,
+        "text": "\n"
+      },
+      {
+        "id": 203,
+        "logprob": -0.35229492,
+        "special": false,
+        "text": "\n"
+      },
+      {
+        "id": 589,
+        "logprob": -1.0371094,
+        "special": false,
+        "text": "def"
+      }
+    ]
+  },
+  "generated_text": "():\n    print(\"Hello World\")\n\ndef"
+}

integration-tests/models/__snapshots__/test_flash_starcoder/test_flash_starcoder_default_params.json

@@ -0,0 +1,105 @@
+{
+  "details": {
+    "best_of_sequences": null,
+    "finish_reason": "eos_token",
+    "generated_tokens": 12,
+    "prefill": [
+      {
+        "id": 589,
+        "logprob": null,
+        "text": "def"
+      },
+      {
+        "id": 1459,
+        "logprob": -5.6289062,
+        "text": " print"
+      },
+      {
+        "id": 81,
+        "logprob": -1.6005859,
+        "text": "_"
+      },
+      {
+        "id": 7656,
+        "logprob": -5.9921875,
+        "text": "hello"
+      }
+    ],
+    "seed": 0,
+    "tokens": [
+      {
+        "id": 2262,
+        "logprob": -0.7451172,
+        "special": false,
+        "text": "():"
+      },
+      {
+        "id": 284,
+        "logprob": -0.21325684,
+        "special": false,
+        "text": "\n   "
+      },
+      {
+        "id": 5741,
+        "logprob": -5.734375,
+        "special": false,
+        "text": " logging"
+      },
+      {
+        "id": 32,
+        "logprob": 0.0,
+        "special": false,
+        "text": "."
+      },
+      {
+        "id": 1338,
+        "logprob": -0.3232422,
+        "special": false,
+        "text": "info"
+      },
+      {
+        "id": 463,
+        "logprob": -1.0380859,
+        "special": false,
+        "text": "('"
+      },
+      {
+        "id": 8279,
+        "logprob": -0.8378906,
+        "special": false,
+        "text": "Hello"
+      },
+      {
+        "id": 30,
+        "logprob": -1.9501953,
+        "special": false,
+        "text": ","
+      },
+      {
+        "id": 10896,
+        "logprob": -1.3476562,
+        "special": false,
+        "text": " World"
+      },
+      {
+        "id": 683,
+        "logprob": -1.796875,
+        "special": false,
+        "text": "')"
+      },
+      {
+        "id": 203,
+        "logprob": -0.9873047,
+        "special": false,
+        "text": "\n"
+      },
+      {
+        "id": 0,
+        "logprob": -0.7495117,
+        "special": true,
+        "text": "<|endoftext|>"
+      }
+    ]
+  },
+  "generated_text": "():\n    logging.info('Hello, World')\n<|endoftext|>"
+}

integration-tests/models/__snapshots__/test_flash_starcoder/test_flash_starcoder_load.json

@@ -0,0 +1,374 @@
+[
+  {
+    "details": {
+      "best_of_sequences": null,
+      "finish_reason": "length",
+      "generated_tokens": 10,
+      "prefill": [
+        {
+          "id": 589,
+          "logprob": null,
+          "text": "def"
+        },
+        {
+          "id": 1459,
+          "logprob": -5.6289062,
+          "text": " print"
+        },
+        {
+          "id": 81,
+          "logprob": -1.6005859,
+          "text": "_"
+        },
+        {
+          "id": 7656,
+          "logprob": -5.9921875,
+          "text": "hello"
+        }
+      ],
+      "seed": null,
+      "tokens": [
+        {
+          "id": 2262,
+          "logprob": -0.7705078,
+          "special": false,
+          "text": "():"
+        },
+        {
+          "id": 284,
+          "logprob": -0.2602539,
+          "special": false,
+          "text": "\n   "
+        },
+        {
+          "id": 1459,
+          "logprob": -0.39282227,
+          "special": false,
+          "text": " print"
+        },
+        {
+          "id": 440,
+          "logprob": -0.6113281,
+          "special": false,
+          "text": "(\""
+        },
+        {
+          "id": 8279,
+          "logprob": -0.4765625,
+          "special": false,
+          "text": "Hello"
+        },
+        {
+          "id": 10896,
+          "logprob": -1.5068359,
+          "special": false,
+          "text": " World"
+        },
+        {
+          "id": 657,
+          "logprob": -0.8154297,
+          "special": false,
+          "text": "\")"
+        },
+        {
+          "id": 203,
+          "logprob": -0.7319336,
+          "special": false,
+          "text": "\n"
+        },
+        {
+          "id": 203,
+          "logprob": -0.35229492,
+          "special": false,
+          "text": "\n"
+        },
+        {
+          "id": 589,
+          "logprob": -1.0380859,
+          "special": false,
+          "text": "def"
+        }
+      ]
+    },
+    "generated_text": "():\n    print(\"Hello World\")\n\ndef"
+  },
+  {
+    "details": {
+      "best_of_sequences": null,
+      "finish_reason": "length",
+      "generated_tokens": 10,
+      "prefill": [
+        {
+          "id": 589,
+          "logprob": null,
+          "text": "def"
+        },
+        {
+          "id": 1459,
+          "logprob": -5.6289062,
+          "text": " print"
+        },
+        {
+          "id": 81,
+          "logprob": -1.6005859,
+          "text": "_"
+        },
+        {
+          "id": 7656,
+          "logprob": -5.9921875,
+          "text": "hello"
+        }
+      ],
+      "seed": null,
+      "tokens": [
+        {
+          "id": 2262,
+          "logprob": -0.7705078,
+          "special": false,
+          "text": "():"
+        },
+        {
+          "id": 284,
+          "logprob": -0.2602539,
+          "special": false,
+          "text": "\n   "
+        },
+        {
+          "id": 1459,
+          "logprob": -0.39282227,
+          "special": false,
+          "text": " print"
+        },
+        {
+          "id": 440,
+          "logprob": -0.6113281,
+          "special": false,
+          "text": "(\""
+        },
+        {
+          "id": 8279,
+          "logprob": -0.4765625,
+          "special": false,
+          "text": "Hello"
+        },
+        {
+          "id": 10896,
+          "logprob": -1.5068359,
+          "special": false,
+          "text": " World"
+        },
+        {
+          "id": 657,
+          "logprob": -0.8154297,
+          "special": false,
+          "text": "\")"
+        },
+        {
+          "id": 203,
+          "logprob": -0.7319336,
+          "special": false,
+          "text": "\n"
+        },
+        {
+          "id": 203,
+          "logprob": -0.35229492,
+          "special": false,
+          "text": "\n"
+        },
+        {
+          "id": 589,
+          "logprob": -1.0380859,
+          "special": false,
+          "text": "def"
+        }
+      ]
+    },
+    "generated_text": "():\n    print(\"Hello World\")\n\ndef"
+  },
+  {
+    "details": {
+      "best_of_sequences": null,
+      "finish_reason": "length",
+      "generated_tokens": 10,
+      "prefill": [
+        {
+          "id": 589,
+          "logprob": null,
+          "text": "def"
+        },
+        {
+          "id": 1459,
+          "logprob": -5.6289062,
+          "text": " print"
+        },
+        {
+          "id": 81,
+          "logprob": -1.6005859,
+          "text": "_"
+        },
+        {
+          "id": 7656,
+          "logprob": -5.9921875,
+          "text": "hello"
+        }
+      ],
+      "seed": null,
+      "tokens": [
+        {
+          "id": 2262,
+          "logprob": -0.7705078,
+          "special": false,
+          "text": "():"
+        },
+        {
+          "id": 284,
+          "logprob": -0.2602539,
+          "special": false,
+          "text": "\n   "
+        },
+        {
+          "id": 1459,
+          "logprob": -0.39282227,
+          "special": false,
+          "text": " print"
+        },
+        {
+          "id": 440,
+          "logprob": -0.6113281,
+          "special": false,
+          "text": "(\""
+        },
+        {
+          "id": 8279,
+          "logprob": -0.4765625,
+          "special": false,
+          "text": "Hello"
+        },
+        {
+          "id": 10896,
+          "logprob": -1.5068359,
+          "special": false,
+          "text": " World"
+        },
+        {
+          "id": 657,
+          "logprob": -0.8154297,
+          "special": false,
+          "text": "\")"
+        },
+        {
+          "id": 203,
+          "logprob": -0.7319336,
+          "special": false,
+          "text": "\n"
+        },
+        {
+          "id": 203,
+          "logprob": -0.35229492,
+          "special": false,
+          "text": "\n"
+        },
+        {
+          "id": 589,
+          "logprob": -1.0380859,
+          "special": false,
+          "text": "def"
+        }
+      ]
+    },
+    "generated_text": "():\n    print(\"Hello World\")\n\ndef"
+  },
+  {
+    "details": {
+      "best_of_sequences": null,
+      "finish_reason": "length",
+      "generated_tokens": 10,
+      "prefill": [
+        {
+          "id": 589,
+          "logprob": null,
+          "text": "def"
+        },
+        {
+          "id": 1459,
+          "logprob": -5.6289062,
+          "text": " print"
+        },
+        {
+          "id": 81,
+          "logprob": -1.6005859,
+          "text": "_"
+        },
+        {
+          "id": 7656,
+          "logprob": -5.9921875,
+          "text": "hello"
+        }
+      ],
+      "seed": null,
+      "tokens": [
+        {
+          "id": 2262,
+          "logprob": -0.7705078,
+          "special": false,
+          "text": "():"
+        },
+        {
+          "id": 284,
+          "logprob": -0.2602539,
+          "special": false,
+          "text": "\n   "
+        },
+        {
+          "id": 1459,
+          "logprob": -0.39282227,
+          "special": false,
+          "text": " print"
+        },
+        {
+          "id": 440,
+          "logprob": -0.6113281,
+          "special": false,
+          "text": "(\""
+        },
+        {
+          "id": 8279,
+          "logprob": -0.4765625,
+          "special": false,
+          "text": "Hello"
+        },
+        {
+          "id": 10896,
+          "logprob": -1.5068359,
+          "special": false,
+          "text": " World"
+        },
+        {
+          "id": 657,
+          "logprob": -0.8154297,
+          "special": false,
+          "text": "\")"
+        },
+        {
+          "id": 203,
+          "logprob": -0.7319336,
+          "special": false,
+          "text": "\n"
+        },
+        {
+          "id": 203,
+          "logprob": -0.35229492,
+          "special": false,
+          "text": "\n"
+        },
+        {
+          "id": 589,
+          "logprob": -1.0380859,
+          "special": false,
+          "text": "def"
+        }
+      ]
+    },
+    "generated_text": "():\n    print(\"Hello World\")\n\ndef"
+  }
+]

integration-tests/models/__snapshots__/test_mt0_base/test_mt0_base.json

@@ -0,0 +1,48 @@
+{
+  "details": {
+    "best_of_sequences": null,
+    "finish_reason": "eos_token",
+    "generated_tokens": 5,
+    "prefill": [
+      {
+        "id": 0,
+        "logprob": null,
+        "text": "<pad>"
+      }
+    ],
+    "seed": 0,
+    "tokens": [
+      {
+        "id": 926,
+        "logprob": -4.3554688,
+        "special": false,
+        "text": " To"
+      },
+      {
+        "id": 18295,
+        "logprob": -7.7734375,
+        "special": false,
+        "text": " sell"
+      },
+      {
+        "id": 7868,
+        "logprob": -3.9257812,
+        "special": false,
+        "text": " things"
+      },
+      {
+        "id": 260,
+        "logprob": -2.4179688,
+        "special": false,
+        "text": "."
+      },
+      {
+        "id": 1,
+        "logprob": 0.0,
+        "special": true,
+        "text": "</s>"
+      }
+    ]
+  },
+  "generated_text": "To sell things."
+}

integration-tests/models/__snapshots__/test_mt0_base/test_mt0_base_all_params.json

@@ -0,0 +1,78 @@
+{
+  "details": {
+    "best_of_sequences": null,
+    "finish_reason": "length",
+    "generated_tokens": 10,
+    "prefill": [
+      {
+        "id": 0,
+        "logprob": null,
+        "text": "<pad>"
+      }
+    ],
+    "seed": 0,
+    "tokens": [
+      {
+        "id": 16017,
+        "logprob": -1.3505859,
+        "special": false,
+        "text": " blue"
+      },
+      {
+        "id": 20495,
+        "logprob": -0.50439453,
+        "special": false,
+        "text": " sky"
+      },
+      {
+        "id": 259,
+        "logprob": -1.2011719,
+        "special": false,
+        "text": " "
+      },
+      {
+        "id": 15484,
+        "logprob": -2.8378906,
+        "special": false,
+        "text": "appear"
+      },
+      {
+        "id": 345,
+        "logprob": -0.87597656,
+        "special": false,
+        "text": "ed"
+      },
+      {
+        "id": 288,
+        "logprob": -1.8447266,
+        "special": false,
+        "text": " to"
+      },
+      {
+        "id": 35622,
+        "logprob": -7.1445312,
+        "special": false,
+        "text": " cloud"
+      },
+      {
+        "id": 263,
+        "logprob": -1.2929688,
+        "special": false,
+        "text": "s"
+      },
+      {
+        "id": 14701,
+        "logprob": -3.0761719,
+        "special": false,
+        "text": " above"
+      },
+      {
+        "id": 751,
+        "logprob": -4.4375,
+        "special": false,
+        "text": " all"
+      }
+    ]
+  },
+  "generated_text": "Why is the sky blue?blue sky appeared to clouds above all"
+}

integration-tests/models/__snapshots__/test_mt0_base/test_mt0_base_load.json

@@ -0,0 +1,218 @@
+[
+  {
+    "details": {
+      "best_of_sequences": null,
+      "finish_reason": "eos_token",
+      "generated_tokens": 6,
+      "prefill": [
+        {
+          "id": 0,
+          "logprob": null,
+          "text": "<pad>"
+        }
+      ],
+      "seed": null,
+      "tokens": [
+        {
+          "id": 259,
+          "logprob": -1.3798828,
+          "special": false,
+          "text": " "
+        },
+        {
+          "id": 39261,
+          "logprob": -0.36328125,
+          "special": false,
+          "text": "Because"
+        },
+        {
+          "id": 609,
+          "logprob": -1.0947266,
+          "special": false,
+          "text": " it"
+        },
+        {
+          "id": 339,
+          "logprob": -0.8286133,
+          "special": false,
+          "text": " is"
+        },
+        {
+          "id": 16017,
+          "logprob": -1.6826172,
+          "special": false,
+          "text": " blue"
+        },
+        {
+          "id": 1,
+          "logprob": -0.7290039,
+          "special": true,
+          "text": "</s>"
+        }
+      ]
+    },
+    "generated_text": "Because it is blue"
+  },
+  {
+    "details": {
+      "best_of_sequences": null,
+      "finish_reason": "eos_token",
+      "generated_tokens": 6,
+      "prefill": [
+        {
+          "id": 0,
+          "logprob": null,
+          "text": "<pad>"
+        }
+      ],
+      "seed": null,
+      "tokens": [
+        {
+          "id": 259,
+          "logprob": -1.3789062,
+          "special": false,
+          "text": " "
+        },
+        {
+          "id": 39261,
+          "logprob": -0.36279297,
+          "special": false,
+          "text": "Because"
+        },
+        {
+          "id": 609,
+          "logprob": -1.0966797,
+          "special": false,
+          "text": " it"
+        },
+        {
+          "id": 339,
+          "logprob": -0.8276367,
+          "special": false,
+          "text": " is"
+        },
+        {
+          "id": 16017,
+          "logprob": -1.6845703,
+          "special": false,
+          "text": " blue"
+        },
+        {
+          "id": 1,
+          "logprob": -0.72753906,
+          "special": true,
+          "text": "</s>"
+        }
+      ]
+    },
+    "generated_text": "Because it is blue"
+  },
+  {
+    "details": {
+      "best_of_sequences": null,
+      "finish_reason": "eos_token",
+      "generated_tokens": 6,
+      "prefill": [
+        {
+          "id": 0,
+          "logprob": null,
+          "text": "<pad>"
+        }
+      ],
+      "seed": null,
+      "tokens": [
+        {
+          "id": 259,
+          "logprob": -1.3789062,
+          "special": false,
+          "text": " "
+        },
+        {
+          "id": 39261,
+          "logprob": -0.36279297,
+          "special": false,
+          "text": "Because"
+        },
+        {
+          "id": 609,
+          "logprob": -1.0966797,
+          "special": false,
+          "text": " it"
+        },
+        {
+          "id": 339,
+          "logprob": -0.8276367,
+          "special": false,
+          "text": " is"
+        },
+        {
+          "id": 16017,
+          "logprob": -1.6845703,
+          "special": false,
+          "text": " blue"
+        },
+        {
+          "id": 1,
+          "logprob": -0.72753906,
+          "special": true,
+          "text": "</s>"
+        }
+      ]
+    },
+    "generated_text": "Because it is blue"
+  },
+  {
+    "details": {
+      "best_of_sequences": null,
+      "finish_reason": "eos_token",
+      "generated_tokens": 6,
+      "prefill": [
+        {
+          "id": 0,
+          "logprob": null,
+          "text": "<pad>"
+        }
+      ],
+      "seed": null,
+      "tokens": [
+        {
+          "id": 259,
+          "logprob": -1.3789062,
+          "special": false,
+          "text": " "
+        },
+        {
+          "id": 39261,
+          "logprob": -0.36279297,
+          "special": false,
+          "text": "Because"
+        },
+        {
+          "id": 609,
+          "logprob": -1.0966797,
+          "special": false,
+          "text": " it"
+        },
+        {
+          "id": 339,
+          "logprob": -0.8276367,
+          "special": false,
+          "text": " is"
+        },
+        {
+          "id": 16017,
+          "logprob": -1.6845703,
+          "special": false,
+          "text": " blue"
+        },
+        {
+          "id": 1,
+          "logprob": -0.72753906,
+          "special": true,
+          "text": "</s>"
+        }
+      ]
+    },
+    "generated_text": "Because it is blue"
+  }
+]

integration-tests/models/test_bloom_560m.py

@@ -0,0 +1,62 @@
+import pytest
+
+
+@pytest.fixture(scope="module")
+def bloom_560_handle(launcher):
+    with launcher("bigscience/bloom-560m") as handle:
+        yield handle
+
+
+@pytest.fixture(scope="module")
+async def bloom_560(bloom_560_handle):
+    await bloom_560_handle.health(60)
+    return bloom_560_handle.client
+
+
+@pytest.mark.asyncio
+async def test_bloom_560m(bloom_560, response_snapshot):
+    response = await bloom_560.generate(
+        "Pour déguster un ortolan, il faut tout d'abord",
+        max_new_tokens=10,
+        top_p=0.9,
+        seed=0,
+    )
+
+    assert response.details.generated_tokens == 10
+    assert response == response_snapshot
+
+
+@pytest.mark.asyncio
+async def test_bloom_560m_all_params(bloom_560, response_snapshot):
+    response = await bloom_560.generate(
+        "Pour déguster un ortolan, il faut tout d'abord",
+        max_new_tokens=10,
+        repetition_penalty=1.2,
+        return_full_text=True,
+        stop_sequences=["test"],
+        temperature=0.5,
+        top_p=0.9,
+        top_k=10,
+        truncate=5,
+        typical_p=0.9,
+        watermark=True,
+        seed=0,
+    )
+
+    assert response.details.generated_tokens == 10
+    assert response == response_snapshot
+
+
+@pytest.mark.asyncio
+async def test_bloom_560m_load(bloom_560, generate_load, response_snapshot):
+    responses = await generate_load(
+        bloom_560,
+        "Pour déguster un ortolan, il faut tout d'abord",
+        max_new_tokens=10,
+        n=4,
+    )
+
+    assert len(responses) == 4
+    assert all([r.generated_text == responses[0].generated_text for r in responses])
+
+    assert responses == response_snapshot

integration-tests/models/test_bloom_560m_sharded.py

@@ -0,0 +1,43 @@
+import pytest
+
+
+@pytest.fixture(scope="module")
+def bloom_560m_sharded_handle(launcher):
+    with launcher("bigscience/bloom-560m", num_shard=2) as handle:
+        yield handle
+
+
+@pytest.fixture(scope="module")
+async def bloom_560m_sharded(bloom_560m_sharded_handle):
+    await bloom_560m_sharded_handle.health(60)
+    return bloom_560m_sharded_handle.client
+
+
+@pytest.mark.asyncio
+async def test_bloom_560m_sharded(bloom_560m_sharded, response_snapshot):
+    response = await bloom_560m_sharded.generate(
+        "Pour déguster un ortolan, il faut tout d'abord",
+        max_new_tokens=10,
+        top_p=0.9,
+        seed=0,
+    )
+
+    assert response.details.generated_tokens == 10
+    assert response == response_snapshot
+
+
+@pytest.mark.asyncio
+async def test_bloom_560m_sharded_load(
+    bloom_560m_sharded, generate_load, response_snapshot
+):
+    responses = await generate_load(
+        bloom_560m_sharded,
+        "Pour déguster un ortolan, il faut tout d'abord",
+        max_new_tokens=10,
+        n=4,
+    )
+
+    assert len(responses) == 4
+    assert all([r.generated_text == responses[0].generated_text for r in responses])
+
+    assert responses == response_snapshot

integration-tests/models/test_flash_llama.py

@@ -0,0 +1,55 @@
+import pytest
+
+
+@pytest.fixture(scope="module")
+def flash_llama_handle(launcher):
+    with launcher("huggingface/llama-7b", num_shard=2) as handle:
+        yield handle
+
+
+@pytest.fixture(scope="module")
+async def flash_llama(flash_llama_handle):
+    await flash_llama_handle.health(120)
+    return flash_llama_handle.client
+
+
+@pytest.mark.asyncio
+@pytest.mark.private
+async def test_flash_llama(flash_llama, response_snapshot):
+    response = await flash_llama.generate("Test request", max_new_tokens=10)
+
+    assert response.details.generated_tokens == 10
+    assert response == response_snapshot
+
+
+@pytest.mark.asyncio
+@pytest.mark.private
+async def test_flash_llama_all_params(flash_llama, response_snapshot):
+    response = await flash_llama.generate(
+        "Test request",
+        max_new_tokens=10,
+        repetition_penalty=1.2,
+        return_full_text=True,
+        stop_sequences=["test"],
+        temperature=0.5,
+        top_p=0.9,
+        top_k=10,
+        truncate=5,
+        typical_p=0.9,
+        watermark=True,
+        seed=0,
+    )
+
+    assert response.details.generated_tokens == 10
+    assert response == response_snapshot
+
+
+@pytest.mark.asyncio
+@pytest.mark.private
+async def test_flash_llama_load(flash_llama, generate_load, response_snapshot):
+    responses = await generate_load(flash_llama, "Test request", max_new_tokens=10, n=4)
+
+    assert len(responses) == 4
+    assert all([r.generated_text == responses[0].generated_text for r in responses])
+
+    assert responses == response_snapshot

integration-tests/models/test_flash_neox.py

@@ -0,0 +1,39 @@
+import pytest
+
+
+@pytest.fixture(scope="module")
+def flash_neox_handle(launcher):
+    with launcher("OpenAssistant/oasst-sft-1-pythia-12b", num_shard=2) as handle:
+        yield handle
+
+
+@pytest.fixture(scope="module")
+async def flash_neox(flash_neox_handle):
+    await flash_neox_handle.health(240)
+    return flash_neox_handle.client
+
+
+@pytest.mark.asyncio
+async def test_flash_neox(flash_neox, response_snapshot):
+    response = await flash_neox.generate(
+        "<|prompter|>What is a meme, and what's the history behind this word?<|endoftext|><|assistant|>",
+        max_new_tokens=10,
+    )
+
+    assert response.details.generated_tokens == 10
+    assert response == response_snapshot
+
+
+@pytest.mark.asyncio
+async def test_flash_neox_load(flash_neox, generate_load, response_snapshot):
+    responses = await generate_load(
+        flash_neox,
+        "<|prompter|>What is a meme, and what's the history behind this word?<|endoftext|><|assistant|>",
+        max_new_tokens=10,
+        n=4,
+    )
+
+    assert len(responses) == 4
+    assert all([r.generated_text == responses[0].generated_text for r in responses])
+
+    assert responses == response_snapshot

integration-tests/models/test_flash_santacoder.py

@@ -0,0 +1,35 @@
+import pytest
+
+
+@pytest.fixture(scope="module")
+def flash_santacoder_handle(launcher):
+    with launcher("bigcode/santacoder") as handle:
+        yield handle
+
+
+@pytest.fixture(scope="module")
+async def flash_santacoder(flash_santacoder_handle):
+    await flash_santacoder_handle.health(240)
+    return flash_santacoder_handle.client
+
+
+@pytest.mark.asyncio
+async def test_flash_santacoder(flash_santacoder, response_snapshot):
+    response = await flash_santacoder.generate("def print_hello", max_new_tokens=10)
+
+    assert response.details.generated_tokens == 10
+    assert response == response_snapshot
+
+
+@pytest.mark.asyncio
+async def test_flash_santacoder_load(
+    flash_santacoder, generate_load, response_snapshot
+):
+    responses = await generate_load(
+        flash_santacoder, "def print_hello", max_new_tokens=10, n=4
+    )
+
+    assert len(responses) == 4
+    assert all([r.generated_text == responses[0].generated_text for r in responses])
+
+    assert responses == response_snapshot

integration-tests/models/test_flash_starcoder.py

@@ -0,0 +1,46 @@
+import pytest
+
+
+@pytest.fixture(scope="module")
+def flash_starcoder_handle(launcher):
+    with launcher("bigcode/starcoder", num_shard=2) as handle:
+        yield handle
+
+
+@pytest.fixture(scope="module")
+async def flash_starcoder(flash_starcoder_handle):
+    await flash_starcoder_handle.health(240)
+    return flash_starcoder_handle.client
+
+
+@pytest.mark.asyncio
+@pytest.mark.private
+async def test_flash_starcoder(flash_starcoder, response_snapshot):
+    response = await flash_starcoder.generate("def print_hello", max_new_tokens=10)
+
+    assert response.details.generated_tokens == 10
+    assert response == response_snapshot
+
+
+@pytest.mark.asyncio
+@pytest.mark.private
+async def test_flash_starcoder_default_params(flash_starcoder, response_snapshot):
+    response = await flash_starcoder.generate(
+        "def print_hello", max_new_tokens=60, temperature=0.2, top_p=0.95, seed=0
+    )
+
+    assert response.details.generated_tokens == 12
+    assert response == response_snapshot
+
+
+@pytest.mark.asyncio
+@pytest.mark.private
+async def test_flash_starcoder_load(flash_starcoder, generate_load, response_snapshot):
+    responses = await generate_load(
+        flash_starcoder, "def print_hello", max_new_tokens=10, n=4
+    )
+
+    assert len(responses) == 4
+    assert all([r.generated_text == responses[0].generated_text for r in responses])
+
+    assert responses == response_snapshot

integration-tests/models/test_mt0_base.py

@@ -0,0 +1,62 @@
+import pytest
+
+
+@pytest.fixture(scope="module")
+def mt0_base_handle(launcher):
+    with launcher("bigscience/mt0-base") as handle:
+        yield handle
+
+
+@pytest.fixture(scope="module")
+async def mt0_base(mt0_base_handle):
+    await mt0_base_handle.health(60)
+    return mt0_base_handle.client
+
+
+@pytest.mark.asyncio
+async def test_mt0_base(mt0_base, response_snapshot):
+    response = await mt0_base.generate(
+        "Why is the sky blue?",
+        max_new_tokens=10,
+        top_p=0.9,
+        seed=0,
+    )
+
+    assert response.details.generated_tokens == 5
+    assert response == response_snapshot
+
+
+@pytest.mark.asyncio
+async def test_mt0_base_all_params(mt0_base, response_snapshot):
+    response = await mt0_base.generate(
+        "Why is the sky blue?",
+        max_new_tokens=10,
+        repetition_penalty=1.2,
+        return_full_text=True,
+        stop_sequences=["test"],
+        temperature=0.5,
+        top_p=0.9,
+        top_k=10,
+        truncate=5,
+        typical_p=0.9,
+        watermark=True,
+        seed=0,
+    )
+
+    assert response.details.generated_tokens == 10
+    assert response == response_snapshot
+
+
+@pytest.mark.asyncio
+async def test_mt0_base_load(mt0_base, generate_load, response_snapshot):
+    responses = await generate_load(
+        mt0_base,
+        "Why is the sky blue?",
+        max_new_tokens=10,
+        n=4,
+    )
+
+    assert len(responses) == 4
+    assert all([r.generated_text == responses[0].generated_text for r in responses])
+
+    assert responses == response_snapshot

integration-tests/requirements.txt

@@ -0,0 +1,5 @@
+syrupy
+text-generation==0.5.2
+pytest
+pytest-asyncio==0.17.2
+docker

launcher/Cargo.toml

@@ -1,9 +1,10 @@
 [package]
 name = "text-generation-launcher"
-version = "0.6.0"
-edition = "2021"
-authors = ["Olivier Dehaene"]
 description = "Text Generation Launcher"
+version.workspace = true
+edition.workspace = true
+authors.workspace = true
+homepage.workspace = true
 
 [dependencies]
 clap = { version = "4.1.4", features = ["derive", "env"] }
@@ -17,3 +18,6 @@ tracing-subscriber = { version = "0.3.16", features = ["json"] }
 [dev-dependencies]
 float_eq = "1.0.1"
 reqwest = { version = "0.11.14", features = ["blocking", "json"] }
+
+[build-dependencies]
+vergen = { version = "8.0.0", features = ["build", "cargo", "git", "gitcl", "rustc", "si"] }

launcher/build.rs

@@ -0,0 +1,29 @@
+use std::error::Error;
+use vergen::EmitBuilder;
+
+fn main() -> Result<(), Box<dyn Error>> {
+    // Emit cargo and rustc compile time values
+    EmitBuilder::builder().all_cargo().all_rustc().emit()?;
+
+    // Try to get the git sha from the local git repository
+    if EmitBuilder::builder()
+        .fail_on_error()
+        .git_sha(false)
+        .emit()
+        .is_err()
+    {
+        // Unable to get the git sha
+        if let Ok(sha) = std::env::var("GIT_SHA") {
+            // Set it from an env var
+            println!("cargo:rustc-env=VERGEN_GIT_SHA={sha}");
+        }
+    }
+
+    // Set docker label if present
+    if let Ok(label) = std::env::var("DOCKER_LABEL") {
+        // Set it from an env var
+        println!("cargo:rustc-env=DOCKER_LABEL={label}");
+    }
+
+    Ok(())
+}

launcher/src/env_runtime.rs

@@ -0,0 +1,45 @@
+use std::fmt;
+use std::process::Command;
+
+pub(crate) struct Env {
+    cargo_target: &'static str,
+    cargo_version: &'static str,
+    git_sha: &'static str,
+    docker_label: &'static str,
+    nvidia_env: String,
+}
+
+impl Env {
+    pub fn new() -> Self {
+        let nvidia_env = nvidia_smi();
+
+        Self {
+            nvidia_env: nvidia_env.unwrap_or("N/A".to_string()),
+            cargo_target: env!("VERGEN_CARGO_TARGET_TRIPLE"),
+            cargo_version: env!("VERGEN_RUSTC_SEMVER"),
+            git_sha: option_env!("VERGEN_GIT_SHA").unwrap_or("N/A"),
+            docker_label: option_env!("DOCKER_LABEL").unwrap_or("N/A"),
+        }
+    }
+}
+
+impl fmt::Display for Env {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        writeln!(f, "Runtime environment:")?;
+
+        writeln!(f, "Target: {}", self.cargo_target)?;
+        writeln!(f, "Cargo version: {}", self.cargo_version)?;
+        writeln!(f, "Commit sha: {}", self.git_sha)?;
+        writeln!(f, "Docker label: {}", self.docker_label)?;
+        write!(f, "nvidia-smi:\n{}", self.nvidia_env)?;
+
+        Ok(())
+    }
+}
+
+fn nvidia_smi() -> Option<String> {
+    let output = Command::new("nvidia-smi").output().ok()?;
+    let nvidia_smi = String::from_utf8(output.stdout).ok()?;
+    let output = nvidia_smi.replace('\n', "\n   ");
+    Some(output.trim().to_string())
+}

launcher/src/main.rs

@@ -1,4 +1,4 @@
-use clap::Parser;
+use clap::{Parser, ValueEnum};
 use serde::Deserialize;
 use std::env;
 use std::ffi::OsString;
@@ -14,62 +14,218 @@ use std::time::{Duration, Instant};
 use std::{fs, io};
 use subprocess::{ExitStatus, Popen, PopenConfig, PopenError, Redirection};
 
+mod env_runtime;
+
+#[derive(Clone, Copy, Debug, ValueEnum)]
+enum Quantization {
+    Bitsandbytes,
+    Gptq,
+}
+
+impl std::fmt::Display for Quantization {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        // To keep in track with `server`.
+        match self {
+            Quantization::Bitsandbytes => {
+                write!(f, "bitsandbytes")
+            }
+            Quantization::Gptq => {
+                write!(f, "gptq")
+            }
+        }
+    }
+}
+
 /// App Configuration
 #[derive(Parser, Debug)]
 #[clap(author, version, about, long_about = None)]
 struct Args {
+    /// The name of the model to load.
+    /// Can be a MODEL_ID as listed on <https://hf.co/models> like
+    /// `gpt2` or `OpenAssistant/oasst-sft-1-pythia-12b`.
+    /// Or it can be a local directory containing the necessary files
+    /// as saved by `save_pretrained(...)` methods of transformers
     #[clap(default_value = "bigscience/bloom-560m", long, env)]
     model_id: String,
+
+    /// The actual revision of the model if you're referring to a model
+    /// on the hub. You can use a specific commit id or a branch like `refs/pr/2`.
     #[clap(long, env)]
     revision: Option<String>,
+
+    /// Wether to shard or not the model across multiple GPUs
+    /// By default text-generation-inference will use all available GPUs to run
+    /// the model. Setting it to `false` deactivates `num_shard`.
     #[clap(long, env)]
     sharded: Option<bool>,
+
+    /// The number of shards to use if you don't want to use all GPUs on a given machine.
+    /// You can use `CUDA_VISIBLE_DEVICE=0,1 text-generation-launcher... --num_shard 2`
+    /// and `CUDA_VISIBLE_DEVICE=2,3 text-generation-launcher... --num_shard 2` to
+    /// launch 2 copies with 2 shard each on a given machine with 4 GPUs for instance.
     #[clap(long, env)]
     num_shard: Option<usize>,
-    #[clap(long, env)]
+
-    quantize: bool,
+    /// Wether you want the model to be quantized or not. This will use `bitsandbytes` for
+    /// quantization on the fly, or `gptq`.
+    #[clap(long, env, value_enum)]
+    quantize: Option<Quantization>,
+
+    /// The maximum amount of concurrent requests for this particular deployment.
+    /// Having a low limit will refuse clients requests instead of having them
+    /// wait for too long and is usually good to handle backpressure correctly.
     #[clap(default_value = "128", long, env)]
     max_concurrent_requests: usize,
+
+    /// This is the maximum allowed value for clients to set `best_of`.
+    /// Best of makes `n` generations at the same time, and return the best
+    /// in terms of overall log probability over the entire generated sequence
     #[clap(default_value = "2", long, env)]
     max_best_of: usize,
+
+    /// This is the maximum allowed value for clients to set `stop_sequences`.
+    /// Stop sequences are used to allow the model to stop on more than just
+    /// the EOS token, and enable more complex "prompting" where users can preprompt
+    /// the model in a specific way and define their "own" stop token aligned with
+    /// their prompt.
     #[clap(default_value = "4", long, env)]
     max_stop_sequences: usize,
+
+    /// This is the maximum allowed input length (expressed in number of tokens)
+    /// for users. The larger this value, the longer prompt users can send which
+    /// can impact the overall memory required to handle the load.
+    /// Please note that some models have a finite range of sequence they can handle.
     #[clap(default_value = "1000", long, env)]
     max_input_length: usize,
+
+    /// This is the most important value to set as it defines the "memory budget"
+    /// of running clients requests.
+    /// Clients will send input sequences and ask to generate `max_new_tokens`
+    /// on top. with a value of `1512` users can send either a prompt of
+    /// `1000` and ask for `512` new tokens, or send a prompt of `1` and ask for
+    /// `1511` max_new_tokens.
+    /// The larger this value, the larger amount each request will be in your RAM
+    /// and the less effective batching can be.
     #[clap(default_value = "1512", long, env)]
     max_total_tokens: usize,
+
+    /// The maximum allowed batch size during dynamic batching.
+    /// Using `max_batch_total_tokens` should be favored in general
+    /// as it's a finer way to control RAM usage.
     #[clap(long, env)]
     max_batch_size: Option<usize>,
+
+    /// This represents the ratio of waiting queries vs running queries where
+    /// you want to start considering pausing the running queries to include the waiting
+    /// ones into the same batch.
+    /// `waiting_served_ratio=1.2` Means when 12 queries are waiting and there's
+    /// only 10 queries left in the current batch we check if we can fit those 12
+    /// waiting queries into the batching strategy, and if yes, then batching happens
+    /// delaying the 10 running queries by a `prefill` run.
+    ///
+    /// This setting is only applied if there is room in the batch
+    /// as defined by `max_batch_total_tokens`.
     #[clap(default_value = "1.2", long, env)]
     waiting_served_ratio: f32,
+
+    /// **IMPORTANT** This is one critical control to allow maximum usage
+    /// of the available hardware.
+    ///
+    /// This represents the total amount of potential tokens within a batch.
+    /// When using padding (not recommended) this would be equivalent of
+    /// `batch_size` * `max_total_tokens`.
+    ///
+    /// However in the non-padded (flash attention) version this can be much finer.
+    ///
+    /// For `max_batch_total_tokens=1000`, you could fit `10` queries of `total_tokens=100`
+    /// or a single query of `1000` tokens.
+    ///
+    /// So you don't have to control that finely
+    /// `max_batch_size` or `max_total_tokens`. In fact you could mostly relax them if you
+    /// want maximum flexibility. However, for your users if they are asking for the full amount of
+    /// total tokens, they are likely to wait for a very long time to get a spot
+    /// in the batch (since they are going to be alone) so setting `max_batch_size`
+    /// and `max_total_tokens` can still be useful to prevent those long waiting times.
+    ///
+    /// Overall this number should be the largest possible amount that fits the
+    /// remaining memory (after the model is loaded). Since the actual memory overhead
+    /// depends on other parameters like if you're using quantization, flash attention
+    /// or the model implementation, text-generation-inference cannot infer this number
+    /// automatically.
     #[clap(default_value = "32000", long, env)]
     max_batch_total_tokens: u32,
+
+    /// This setting defines how many tokens can be passed before forcing the waiting
+    /// queries to be put on the batch (if the size of the batch allows for it).
+    /// New queries require 1 `prefill` forward, which is different from `decode`
+    /// and therefore you need to pause the running batch in order to run `prefill`
+    /// to create the correct values for the waiting queries to be able to join the batch.
+    ///
+    /// With a value too small, queries will always "steal" the compute to run `prefill`
+    /// and running queries will be delayed by a lot.
+    ///
+    /// With a value too big, waiting queries could wait for a very long time
+    /// before being allowed a slot in the running batch. If your server is busy
+    /// that means that requests that could run in ~2s on an empty server could
+    /// end up running in ~20s because the query had to wait for 18s.
+    ///
+    /// This number is expressed in number of tokens to make it a bit more
+    /// "model" agnostic, but what should really matter is the overall latency
+    /// for end users.
     #[clap(default_value = "20", long, env)]
     max_waiting_tokens: usize,
     #[clap(default_value = "3000", long, short, env)]
+
+    /// The port to listen on.
     port: u16,
+
+    /// The name of the socket for gRPC communication between the webserver
+    /// and the shards.
     #[clap(default_value = "/tmp/text-generation-server", long, env)]
     shard_uds_path: String,
+
+    /// The address the master shard will listen on. (setting used by torch distributed)
     #[clap(default_value = "localhost", long, env)]
     master_addr: String,
+
+    /// The address the master port will listen on. (setting used by torch distributed)
     #[clap(default_value = "29500", long, env)]
     master_port: usize,
+
+    /// The location of the huggingface hub cache.
+    /// Used to override the location if you want to provide a mounted disk for instance
     #[clap(long, env)]
     huggingface_hub_cache: Option<String>,
+
+    /// The location of the huggingface hub cache.
+    /// Used to override the location if you want to provide a mounted disk for instance
     #[clap(long, env)]
     weights_cache_override: Option<String>,
+
+    /// For some models (like bloom), text-generation-inference implemented custom
+    /// cuda kernels to speed up inference. Those kernels were only tested on A100.
+    /// Use this flag to disable them if you're running on different hardware and
+    /// encounter issues.
     #[clap(long, env)]
     disable_custom_kernels: bool,
+
+    /// Outputs the logs in JSON format (useful for telemetry)
     #[clap(long, env)]
     json_output: bool,
+
     #[clap(long, env)]
     otlp_endpoint: Option<String>,
+
     #[clap(long, env)]
     cors_allow_origin: Vec<String>,
     #[clap(long, env)]
     watermark_gamma: Option<f32>,
     #[clap(long, env)]
     watermark_delta: Option<f32>,
+
+    /// Display a lot of information about your runtime environment
+    #[clap(long, short, action)]
+    env: bool,
 }
 
 #[derive(Debug)]
@@ -82,7 +238,7 @@ enum ShardStatus {
 fn shard_manager(
     model_id: String,
     revision: Option<String>,
-    quantize: bool,
+    quantize: Option<Quantization>,
     uds_path: String,
     rank: usize,
     world_size: usize,
@@ -121,8 +277,9 @@ fn shard_manager(
         shard_argv.push("--sharded".to_string());
     }
 
-    if quantize {
+    if let Some(quantize) = quantize {
-        shard_argv.push("--quantize".to_string())
+        shard_argv.push("--quantize".to_string());
+        shard_argv.push(quantize.to_string())
     }
 
     // Model optional revision
@@ -376,7 +533,11 @@ enum LauncherError {
     WebserverCannotStart,
 }
 
-fn download_model(args: &Args, running: Arc<AtomicBool>) -> Result<(), LauncherError> {
+fn download_convert_model(
+    args: &Args,
+    auto_convert: bool,
+    running: Arc<AtomicBool>,
+) -> Result<(), LauncherError> {
     let mut download_argv = vec![
         "text-generation-server".to_string(),
         "download-weights".to_string(),
@@ -388,6 +549,11 @@ fn download_model(args: &Args, running: Arc<AtomicBool>) -> Result<(), LauncherE
         "--json-output".to_string(),
     ];
 
+    // Auto convert weights to safetensors
+    if auto_convert {
+        download_argv.push("--auto-convert".to_string());
+    }
+
     // Model optional revision
     if let Some(revision) = &args.revision {
         download_argv.push("--revision".to_string());
@@ -397,7 +563,7 @@ fn download_model(args: &Args, running: Arc<AtomicBool>) -> Result<(), LauncherE
     // Copy current process env
     let mut env: Vec<(OsString, OsString)> = env::vars_os().collect();
 
-    // If huggingface_hub_cache is set, pass it to the shard
+    // If huggingface_hub_cache is set, pass it to the download process
     // Useful when running inside a docker container
     if let Some(ref huggingface_hub_cache) = args.huggingface_hub_cache {
         env.push(("HUGGINGFACE_HUB_CACHE".into(), huggingface_hub_cache.into()));
@@ -415,6 +581,15 @@ fn download_model(args: &Args, running: Arc<AtomicBool>) -> Result<(), LauncherE
         env.push(("HUGGING_FACE_HUB_TOKEN".into(), api_token.into()))
     };
 
+    // If args.weights_cache_override is some, pass it to the download process
+    // Useful when running inside a HuggingFace Inference Endpoint
+    if let Some(weights_cache_override) = &args.weights_cache_override {
+        env.push((
+            "WEIGHTS_CACHE_OVERRIDE".into(),
+            weights_cache_override.into(),
+        ));
+    };
+
     // Start process
     tracing::info!("Starting download process.");
     let mut download_process = match Popen::create(
@@ -473,8 +648,21 @@ fn download_model(args: &Args, running: Arc<AtomicBool>) -> Result<(), LauncherE
                         return Err(LauncherError::DownloadError);
                     }
                 }
-                _ => {
+                ExitStatus::Signaled(signal) => {
-                    tracing::error!("Download process exited with an unknown status.");
+                    let mut err = String::new();
+                    download_process
+                        .stderr
+                        .take()
+                        .unwrap()
+                        .read_to_string(&mut err)
+                        .unwrap();
+                    tracing::error!(
+                        "Download process was signaled to shutdown with signal {signal}: {err}"
+                    );
+                    return Err(LauncherError::DownloadError);
+                }
+                e => {
+                    tracing::error!("Download process exited with an unknown status.: {e:?}");
                     return Err(LauncherError::DownloadError);
                 }
             }
@@ -699,6 +887,11 @@ fn main() -> Result<(), LauncherError> {
         tracing_subscriber::fmt().compact().init();
     }
 
+    if args.env {
+        let env_runtime = env_runtime::Env::new();
+        tracing::info!("{}", env_runtime);
+    }
+
     tracing::info!("{:?}", args);
 
     let num_shard = find_num_shards(args.sharded, args.num_shard);
@@ -714,14 +907,11 @@ fn main() -> Result<(), LauncherError> {
     })
     .expect("Error setting Ctrl-C handler");
 
-    // Check if model_id is a local model
+    // auto_convert is only needed for sharded models as we do not require safetensors in
-    let local_path = Path::new(&args.model_id);
+    // single shard mode
-    let is_local_model = local_path.exists() && local_path.is_dir();
+    let auto_convert = num_shard > 1;
-
+    // Download and convert model weights
-    // Download weights for sharded models
+    download_convert_model(&args, auto_convert, running.clone())?;
-    if !is_local_model && args.weights_cache_override.is_none() && num_shard > 1 {
-        download_model(&args, running.clone())?;
-    }
 
     // Shared shutdown bool
     let shutdown = Arc::new(Mutex::new(false));

launcher/tests/bloom_560m.json

@@ -1,142 +0,0 @@
-{
-  "generated_text": ".get(\"action\");\n        if (action == null) {\n            throw new RuntimeException",
-  "details": {
-    "finish_reason": "length",
-    "generated_tokens": 20,
-    "seed": null,
-    "prefill": [
-      {
-        "id": 10264,
-        "text": "Test",
-        "logprob": null
-      },
-      {
-        "id": 8821,
-        "text": " request",
-        "logprob": -11.894989
-      }
-    ],
-    "tokens": [
-      {
-        "id": 17,
-        "text": ".",
-        "logprob": -1.8267672,
-        "special": false
-      },
-      {
-        "id": 1587,
-        "text": "get",
-        "logprob": -2.4674969,
-        "special": false
-      },
-      {
-        "id": 11,
-        "text": "(",
-        "logprob": -1.906001,
-        "special": false
-      },
-      {
-        "id": 5,
-        "text": "\"",
-        "logprob": -1.2279545,
-        "special": false
-      },
-      {
-        "id": 4899,
-        "text": "action",
-        "logprob": -4.170299,
-        "special": false
-      },
-      {
-        "id": 5,
-        "text": "\"",
-        "logprob": -0.32478866,
-        "special": false
-      },
-      {
-        "id": 12,
-        "text": ")",
-        "logprob": -1.0773665,
-        "special": false
-      },
-      {
-        "id": 30,
-        "text": ";",
-        "logprob": -0.27640742,
-        "special": false
-      },
-      {
-        "id": 837,
-        "text": "\n       ",
-        "logprob": -1.6970354,
-        "special": false
-      },
-      {
-        "id": 1320,
-        "text": " if",
-        "logprob": -1.4495516,
-        "special": false
-      },
-      {
-        "id": 375,
-        "text": " (",
-        "logprob": -0.23609057,
-        "special": false
-      },
-      {
-        "id": 4899,
-        "text": "action",
-        "logprob": -1.1916996,
-        "special": false
-      },
-      {
-        "id": 3535,
-        "text": " ==",
-        "logprob": -0.8918753,
-        "special": false
-      },
-      {
-        "id": 5109,
-        "text": " null",
-        "logprob": -0.3933342,
-        "special": false
-      },
-      {
-        "id": 12,
-        "text": ")",
-        "logprob": -0.43212673,
-        "special": false
-      },
-      {
-        "id": 731,
-        "text": " {",
-        "logprob": -0.17702064,
-        "special": false
-      },
-      {
-        "id": 1260,
-        "text": "\n           ",
-        "logprob": -0.07027565,
-        "special": false
-      },
-      {
-        "id": 10519,
-        "text": " throw",
-        "logprob": -1.3915029,
-        "special": false
-      },
-      {
-        "id": 2084,
-        "text": " new",
-        "logprob": -0.04201372,
-        "special": false
-      },
-      {
-        "id": 150858,
-        "text": " RuntimeException",
-        "logprob": -1.7329919,
-        "special": false
-      }
-    ]
-  }
-}

launcher/tests/integration_tests.rs

@@ -1,172 +0,0 @@
-use float_eq::assert_float_eq;
-use serde::Deserialize;
-use serde_json::Value;
-use std::fs::File;
-use std::io::{BufRead, BufReader};
-use std::path::PathBuf;
-use std::thread;
-use std::thread::sleep;
-use std::time::Duration;
-use subprocess::{Popen, PopenConfig, Redirection};
-
-#[derive(Deserialize)]
-pub struct Token {
-    id: u32,
-    text: String,
-    logprob: Option<f32>,
-    special: bool,
-}
-
-#[derive(Deserialize)]
-struct Details {
-    finish_reason: String,
-    generated_tokens: u32,
-    tokens: Vec<Token>,
-}
-
-#[derive(Deserialize)]
-struct GeneratedText {
-    generated_text: String,
-    details: Details,
-}
-
-fn start_launcher(model_id: String, num_shard: usize, port: usize, master_port: usize) -> Popen {
-    let argv = vec![
-        "text-generation-launcher".to_string(),
-        "--model-id".to_string(),
-        model_id.clone(),
-        "--num-shard".to_string(),
-        num_shard.to_string(),
-        "--port".to_string(),
-        port.to_string(),
-        "--master-port".to_string(),
-        master_port.to_string(),
-        "--shard-uds-path".to_string(),
-        format!("/tmp/test-{}-{}-{}", num_shard, port, master_port),
-    ];
-
-    let mut launcher = Popen::create(
-        &argv,
-        PopenConfig {
-            stdout: Redirection::Pipe,
-            stderr: Redirection::Merge,
-            ..Default::default()
-        },
-    )
-    .expect("Could not start launcher");
-
-    // Redirect STDOUT and STDERR to the console
-    // (STDERR is merged into STDOUT)
-    let launcher_stdout = launcher.stdout.take().unwrap();
-
-    thread::spawn(move || {
-        let stdout = BufReader::new(launcher_stdout);
-        for line in stdout.lines() {
-            println!("{}", line.unwrap());
-        }
-    });
-
-    for _ in 0..60 {
-        let health = reqwest::blocking::get(format!("http://localhost:{}/health", port));
-        if health.is_ok() {
-            return launcher;
-        }
-        sleep(Duration::from_secs(2));
-    }
-
-    launcher.terminate().unwrap();
-    launcher.wait().unwrap();
-    panic!("failed to launch {}", model_id)
-}
-
-fn test_model(
-    model_id: String,
-    num_shard: usize,
-    port: usize,
-    master_port: usize,
-) -> GeneratedText {
-    let mut launcher = start_launcher(model_id, num_shard, port, master_port);
-
-    let data = r#"
-        {
-            "inputs": "Test request",
-            "parameters": {
-                "details": true
-            }
-        }"#;
-    let req: Value = serde_json::from_str(data).unwrap();
-
-    let client = reqwest::blocking::Client::new();
-    let res = client
-        .post(format!("http://localhost:{}/generate", port))
-        .json(&req)
-        .send();
-
-    launcher.terminate().unwrap();
-    launcher.wait().unwrap();
-
-    let result: GeneratedText = res.unwrap().json().unwrap();
-    result
-}
-
-fn read_json(name: &str) -> GeneratedText {
-    let mut d = PathBuf::from(env!("CARGO_MANIFEST_DIR"));
-    d.push("tests/");
-    d.push(name);
-
-    let file = File::open(d).unwrap();
-    let reader = BufReader::new(file);
-
-    let result: GeneratedText = serde_json::from_reader(reader).unwrap();
-    result
-}
-
-fn compare_results(result: GeneratedText, expected: GeneratedText) {
-    assert_eq!(result.generated_text, expected.generated_text);
-    assert_eq!(result.details.finish_reason, expected.details.finish_reason);
-    assert_eq!(
-        result.details.generated_tokens,
-        expected.details.generated_tokens
-    );
-
-    for (token, expected_token) in result
-        .details
-        .tokens
-        .into_iter()
-        .zip(expected.details.tokens.into_iter())
-    {
-        assert_eq!(token.id, expected_token.id);
-        assert_eq!(token.text, expected_token.text);
-        assert_eq!(token.special, expected_token.special);
-        if let Some(logprob) = token.logprob {
-            let expected_logprob = expected_token.logprob.unwrap();
-            assert_float_eq!(logprob, expected_logprob, abs <= 0.001);
-        } else {
-            assert_eq!(token.logprob, expected_token.logprob);
-        }
-    }
-}
-
-#[test]
-fn test_bloom_560m() {
-    let expected = read_json("bloom_560m.json");
-
-    let result = test_model("bigscience/bloom-560m".to_string(), 1, 3000, 29500);
-    compare_results(result, expected);
-}
-
-#[test]
-fn test_bloom_560m_distributed() {
-    let expected = read_json("bloom_560m.json");
-
-    let result = test_model("bigscience/bloom-560m".to_string(), 2, 3001, 29501);
-    compare_results(result, expected);
-}
-
-#[test]
-fn test_mt0_base() {
-    let expected = read_json("mt0_base.json");
-
-    let result = test_model("bigscience/mt0-base".to_string(), 1, 3002, 29502);
-    compare_results(result, expected);
-}

launcher/tests/mt0_base.json

@@ -1,137 +0,0 @@
-{
-  "generated_text": "\"\"\"Test the contents of the contents of the contents. \"\"\" test_test",
-  "details": {
-    "finish_reason": "length",
-    "generated_tokens": 20,
-    "seed": null,
-    "prefill": [
-      {
-        "id": 0,
-        "text": "<pad>",
-        "logprob": null
-      }
-    ],
-    "tokens": [
-      {
-        "id": 259,
-        "text": "",
-        "logprob": -1.3656927,
-        "special": false
-      },
-      {
-        "id": 215100,
-        "text": "\"\"\"",
-        "logprob": -2.6551573,
-        "special": false
-      },
-      {
-        "id": 46138,
-        "text": "Test",
-        "logprob": -1.8059857,
-        "special": false
-      },
-      {
-        "id": 287,
-        "text": " the",
-        "logprob": -1.2102449,
-        "special": false
-      },
-      {
-        "id": 259,
-        "text": " ",
-        "logprob": -1.6057279,
-        "special": false
-      },
-      {
-        "id": 49076,
-        "text": "contents",
-        "logprob": -3.6060903,
-        "special": false
-      },
-      {
-        "id": 304,
-        "text": " of",
-        "logprob": -0.5270343,
-        "special": false
-      },
-      {
-        "id": 287,
-        "text": " the",
-        "logprob": -0.62522805,
-        "special": false
-      },
-      {
-        "id": 259,
-        "text": " ",
-        "logprob": -1.4069618,
-        "special": false
-      },
-      {
-        "id": 49076,
-        "text": "contents",
-        "logprob": -2.621994,
-        "special": false
-      },
-      {
-        "id": 304,
-        "text": " of",
-        "logprob": -1.3172221,
-        "special": false
-      },
-      {
-        "id": 287,
-        "text": " the",
-        "logprob": -0.3501925,
-        "special": false
-      },
-      {
-        "id": 259,
-        "text": " ",
-        "logprob": -0.7219573,
-        "special": false
-      },
-      {
-        "id": 49076,
-        "text": "contents",
-        "logprob": -1.0494149,
-        "special": false
-      },
-      {
-        "id": 260,
-        "text": ".",
-        "logprob": -1.0803378,
-        "special": false
-      },
-      {
-        "id": 259,
-        "text": " ",
-        "logprob": -0.32933083,
-        "special": false
-      },
-      {
-        "id": 215100,
-        "text": "\"\"\"",
-        "logprob": -0.11268901,
-        "special": false
-      },
-      {
-        "id": 2978,
-        "text": " test",
-        "logprob": -1.5846587,
-        "special": false
-      },
-      {
-        "id": 290,
-        "text": "_",
-        "logprob": -0.49796978,
-        "special": false
-      },
-      {
-        "id": 4125,
-        "text": "test",
-        "logprob": -2.0026445,
-        "special": false
-      }
-    ]
-  }
-}

router/Cargo.toml

@@ -1,10 +1,11 @@
 [package]
 name = "text-generation-router"
-version = "0.6.0"
-edition = "2021"
-authors = ["Olivier Dehaene"]
 description = "Text Generation Webserver"
 build = "build.rs"
+version.workspace = true
+edition.workspace = true
+authors.workspace = true
+homepage.workspace = true
 
 [lib]
 path = "src/lib.rs"

router/README.md

@@ -0,0 +1,93 @@
+# Router
+
+Also named `webserver` throughout the docs.
+
+This router is handling most of the logic to handle the "batches" tell
+when to pass new `prefill` requests and pausing `decode` requests, which ones etc...
+
+It uses gRPC to communicate with the shards which can therefore be kept
+much simpler and focus on having the most efficient forward passes as possible.
+
+## Continuous batching
+
+One important feature of `text-generation-inference` is enabled
+by this `router`.
+
+Continuous batching is the act of regularly running queries in the same
+`forward` step of the LLM (a "batch") and also removing them when they are
+finished.
+
+In order for continuous batching to be useful, you need to have more compute available
+with respect to the memory requirements of your model. This is essentially true for
+LLMs and the larger the model, the truer it gets (since you have to pool multiple
+GPUs to load the model, you effectively have a lot of compute power at your hands).
+
+
+Static batching is the act of doing several queries at the same time, but usually
+this is controlled by the client, and therefore the amount of batching is decided
+beforehand.
+
+For text-generation, and LLMs which are memory bound we can try to be much more
+efficient with the available compute, by having client sending us single queries, 
+and let the router mix&match queries into or out of batches to make the use the
+compute the most efficiently. This is possible because for LLMs the total compute
+for running the model is much bigger than doing mix&match of the batches themselves.
+
+
+### Simple continuous batching
+
+text-generation works by feeding a prompt to a model, and iteratively calling
+`forward` on the model to produce new text, 1 token at a time.
+
+The first idea is simple, when a query arrives, we start working on it directly.
+When new queries arrive, we simply wait for the current `forward` to be finished
+then batch the current running prompt with the new query, and call `forward`.
+
+Whenever either query is finished: either the model produce EOS (end of sentence) token
+or the query reached the allowed limit. We simply drop it from the batch, remove
+all the allocated memory and we can continue with the rest until nothing is left.
+
+This simple idea generalizes very well and we could potentially stack many requests
+in the same batch.
+
+One thing to note, is that queries can be potentially run with different parameters
+meaning different way to choose the next token (sampling, not sampling, temperature, top_k etc..). This is not problematic for the proposed approach we just need to do the sampling
+independantly on each member of the batch.
+
+### Prefill, decode and past key values
+
+In order to make LLMs and text-generation efficient, there's actually a very powerful
+trick that can be used, which is the "caching" of some attention matrices. [More on that
+in the first part of this blog](https://huggingface.co/blog/accelerated-inference#getting-to-the-first-10x-speedup)
+
+What this means, is that the first "pass" of a prompt is different from the subsequent
+"forward" passes. Since for the first one we have to compute the entire attention matrix, whereas in the follow-ups only require to compute the new token attention.
+The first pass is called `prefill` throughout this codebase where as the follow-ups are called `decode`.
+
+Since `prefill` is much more expensive than `decode` we don't want to do it all the time,
+but a currently running query is probably doing `decode`. If we want to do the continuous
+batching as explained previously we need to run `prefill` at some point in order to create
+the attention matrix required to be able to join the `decode` group.
+
+`text-generation-inference` uses a bunch of different strategies and parameters in
+order to enable you to find the sweet spot between exploiting the hardware and perceived latency.
+
+With no continuous batching at all, latency is going to be super good, but throughput (meaning
+the total number of requests allowed in a given timeframe) is going to be super bad (since it's essentially 1).
+
+With static batching, you can probably reach the maximum throughput (by using the maximum total batch size applicable to your hardware), but the latency is super bad since in order to have maximum throughput you need to wait for requests to come in before processing.
+
+With continuous batching you can find a sweet spot. In general latency is the most critical
+parameter users care about. But a 2x latency slowdown for 10x more users on the same
+hardware is an acceptable tradeoff.
+
+## Token streaming
+
+This is a very important aspect of client UX. As mentionned above, latency is the
+most critical perceived quality of an LLM API.
+
+With token streaming, the server can start answering after the first `prefill` pass
+directly, without waiting for all the generation to be done. For extremely long queries
+this means clients can start to see something happening orders of magnitude before
+the work is done. Seeing something in progress allows them to cut short if it's not 
+what's wanted but also it "feels" better.

router/build.rs

@@ -15,5 +15,12 @@ fn main() -> Result<(), Box<dyn Error>> {
             println!("cargo:rustc-env=VERGEN_GIT_SHA={sha}");
         }
     }
+
+    // Set docker label if present
+    if let Ok(label) = std::env::var("DOCKER_LABEL") {
+        // Set it from an env var
+        println!("cargo:rustc-env=DOCKER_LABEL={label}");
+    }
+
     Ok(())
 }

router/client/Cargo.toml

@@ -1,7 +1,9 @@
 [package]
 name = "text-generation-client"
-version = "0.6.0"
+version.workspace = true
-edition = "2021"
+edition.workspace = true
+authors.workspace = true
+homepage.workspace = true
 
 [dependencies]
 futures = "^0.3"
@@ -12,7 +14,6 @@ tokio = { version = "^1.25", features = ["sync"] }
 tonic = "^0.8"
 tower = "^0.4"
 tracing = "^0.1"
-tracing-error = "^0.2"
 
 [build-dependencies]
 tonic-build = "0.8.4"

router/client/src/lib.rs

@@ -23,6 +23,8 @@ pub enum ClientError {
     Connection(String),
     #[error("Server error: {0}")]
     Generation(String),
+    #[error("Sharded results are empty")]
+    EmptyResults,
 }
 
 impl From<Status> for ClientError {

router/client/src/sharded_client.rs

@@ -1,6 +1,6 @@
 /// Multi shard Client
-use crate::Result;
 use crate::{Batch, Client, Generation, HealthResponse, Request, ShardInfo};
+use crate::{ClientError, Result};
 use futures::future::join_all;
 use tonic::transport::Uri;
 use tracing::instrument;
@@ -20,7 +20,7 @@ impl ShardedClient {
     /// the other shards and returns all uris/unix sockets with the `service_discovery` gRPC method.
     async fn from_master_client(mut master_client: Client) -> Result<Self> {
         // Get all uris/unix sockets from the master client
-        let uris = master_client.service_discovery().await.unwrap();
+        let uris = master_client.service_discovery().await?;
         let futures = uris.into_iter().map(Client::connect_uds);
         let clients: Result<Vec<Client>> = join_all(futures).await.into_iter().collect();
         Ok(Self::new(clients?))
@@ -98,8 +98,9 @@ impl ShardedClient {
             .iter_mut()
             .map(|client| Box::pin(client.prefill(batch.clone())))
             .collect();
-        // all shards return the same message
+        let results: Result<Vec<(Vec<Generation>, Option<Batch>)>> =
-        join_all(futures).await.pop().unwrap()
+            join_all(futures).await.into_iter().collect();
+        merge_generations(results?)
     }
 
     /// Generate one token for each request in the given cached batches
@@ -116,7 +117,20 @@ impl ShardedClient {
             .iter_mut()
             .map(|client| Box::pin(client.decode(batches.clone())))
             .collect();
-        // all shards return the same message
+        let results: Result<Vec<(Vec<Generation>, Option<Batch>)>> =
-        join_all(futures).await.pop().unwrap()
+            join_all(futures).await.into_iter().collect();
+        merge_generations(results?)
     }
 }
+
+/// Merge generations from the different model shards
+fn merge_generations(
+    mut results: Vec<(Vec<Generation>, Option<Batch>)>,
+) -> Result<(Vec<Generation>, Option<Batch>)> {
+    let (mut generations, next_batch) = results.pop().ok_or(ClientError::EmptyResults)?;
+
+    for (mut shard_generations, _) in results.into_iter() {
+        generations.append(&mut shard_generations);
+    }
+    Ok((generations, next_batch))
+}

router/src/health.rs

@@ -4,6 +4,10 @@ use text_generation_client::{
     Batch, NextTokenChooserParameters, Request, ShardedClient, StoppingCriteriaParameters,
 };
 
+// Note: Request ids and batch ids cannot collide.
+const LIVENESS_ID: u64 = u64::MAX;
+const BATCH_ID: u64 = u64::MAX;
+
 #[derive(Clone, Debug)]
 pub(crate) struct Health {
     client: ShardedClient,
@@ -27,7 +31,7 @@ impl Health {
 
             // Dummy batch of 1 token and 1 generated token
             let liveness_request = Request {
-                id: u64::MAX,
+                id: LIVENESS_ID,
                 inputs: "liveness".to_string(),
                 truncate: 10,
                 parameters: Some(NextTokenChooserParameters {
@@ -47,7 +51,7 @@ impl Health {
                 }),
             };
             let batch = Batch {
-                id: u64::MAX,
+                id: BATCH_ID,
                 requests: vec![liveness_request],
                 size: 1,
                 max_tokens: 2,

router/src/lib.rs

@@ -57,6 +57,8 @@ pub struct Info {
     pub version: &'static str,
     #[schema(nullable = true, example = "null")]
     pub sha: Option<&'static str>,
+    #[schema(nullable = true, example = "null")]
+    pub docker_label: Option<&'static str>,
 }
 
 #[derive(Clone, Debug, Deserialize, ToSchema)]

router/src/main.rs

@@ -9,6 +9,7 @@ use opentelemetry::{global, KeyValue};
 use opentelemetry_otlp::WithExportConfig;
 use std::net::{IpAddr, Ipv4Addr, SocketAddr};
 use std::path::Path;
+use std::time::Duration;
 use text_generation_client::ShardedClient;
 use text_generation_router::{server, HubModelInfo};
 use tokenizers::{FromPretrainedParameters, Tokenizer};
@@ -125,7 +126,7 @@ fn main() -> Result<(), std::io::Error> {
         .block_on(async {
             init_logging(otlp_endpoint, json_output);
 
-            if let Some(max_batch_size) = max_batch_size{
+            if let Some(max_batch_size) = max_batch_size {
                 tracing::warn!("`max-batch-size` is deprecated. Use `max-batch-total-tokens` instead");
                 max_batch_total_tokens = (max_batch_size * max_total_tokens) as u32;
                 tracing::warn!("Overriding `max-batch-total-tokens` value with `max-batch-size` * `max-total-tokens` = {max_batch_total_tokens}");
@@ -145,7 +146,10 @@ fn main() -> Result<(), std::io::Error> {
                     sha: None,
                     pipeline_tag: None,
                 },
-                false => get_model_info(&tokenizer_name, &revision, authorization_token).await,
+                false => get_model_info(&tokenizer_name, &revision, authorization_token).await.unwrap_or_else(|| {
+                    tracing::warn!("Could not retrieve model info from the Hugging Face hub.");
+                    HubModelInfo { model_id: tokenizer_name.to_string(), sha: None, pipeline_tag: None }
+                }),
             };
 
             // if pipeline-tag == text-generation we default to return_full_text = true
@@ -195,7 +199,7 @@ fn main() -> Result<(), std::io::Error> {
                 addr,
                 cors_allow_origin,
             )
-            .await;
+                .await;
             Ok(())
         })
 }
@@ -256,21 +260,24 @@ fn init_logging(otlp_endpoint: Option<String>, json_output: bool) {
 }
 
 /// get model info from the Huggingface Hub
-pub async fn get_model_info(model_id: &str, revision: &str, token: Option<String>) -> HubModelInfo {
+pub async fn get_model_info(
+    model_id: &str,
+    revision: &str,
+    token: Option<String>,
+) -> Option<HubModelInfo> {
     let client = reqwest::Client::new();
-    let mut builder = client.get(format!(
+    // Poor man's urlencode
-        "https://huggingface.co/api/models/{model_id}/revision/{revision}"
+    let revision = revision.replace('/', "%2F");
-    ));
+    let url = format!("https://huggingface.co/api/models/{model_id}/revision/{revision}");
+    let mut builder = client.get(url).timeout(Duration::from_secs(5));
     if let Some(token) = token {
         builder = builder.bearer_auth(token);
     }
 
-    let model_info = builder
+    let response = builder.send().await.ok()?;
-        .send()
+
-        .await
+    if response.status().is_success() {
-        .expect("Could not connect to hf.co")
+        return serde_json::from_str(&response.text().await.ok()?).ok();
-        .text()
+    }
-        .await
+    None
-        .expect("error when retrieving model info from hf.co");
-    serde_json::from_str(&model_info).expect("unable to parse model info")
 }

router/src/server.rs

@@ -37,7 +37,11 @@ use utoipa_swagger_ui::SwaggerUi;
     path = "/",
     request_body = CompatGenerateRequest,
     responses(
-        (status = 200, description = "See /generate or /generate_stream"),
+        (status = 200, description = "Generated Text",
+            content(
+                ("application/json" = GenerateResponse),
+                ("text/event-stream" = StreamResponse),
+            )),
         (status = 424, description = "Generation Error", body = ErrorResponse,
             example = json ! ({"error": "Request failed during generation"})),
         (status = 429, description = "Model is overloaded", body = ErrorResponse,
@@ -635,6 +639,7 @@ pub async fn run(
         validation_workers,
         version: env!("CARGO_PKG_VERSION"),
         sha: option_env!("VERGEN_GIT_SHA"),
+        docker_label: option_env!("DOCKER_LABEL"),
     };
 
     // Create router

server/Makefile

@@ -2,7 +2,7 @@ include Makefile-transformers
 include Makefile-flash-att
 
 unit-tests:
-	python -m pytest tests
+	pytest -s -vv -m "not private" tests
 
 gen-server:
 	# Compile protos

server/tests/models/test_model.py

@@ -0,0 +1,78 @@
+import pytest
+import torch
+
+from transformers import AutoTokenizer
+
+from text_generation_server.models import Model
+
+
+def get_test_model():
+    class TestModel(Model):
+        def batch_type(self):
+            raise NotImplementedError
+
+        def generate_token(self, batch):
+            raise NotImplementedError
+
+    tokenizer = AutoTokenizer.from_pretrained("huggingface/llama-7b")
+
+    model = TestModel(
+        torch.nn.Linear(1, 1), tokenizer, False, torch.float32, torch.device("cpu")
+    )
+    return model
+
+
+@pytest.mark.private
+def test_decode_streaming_english_spaces():
+    model = get_test_model()
+    truth = "Hello here, this is a simple test"
+    all_input_ids = [15043, 1244, 29892, 445, 338, 263, 2560, 1243]
+    assert (
+        all_input_ids == model.tokenizer(truth, add_special_tokens=False)["input_ids"]
+    )
+
+    decoded_text = ""
+    offset = 0
+    token_offset = 0
+    for i in range(len(all_input_ids)):
+        text, offset, token_offset = model.decode_token(
+            all_input_ids[: i + 1], offset, token_offset
+        )
+        decoded_text += text
+
+    assert decoded_text == truth
+
+
+@pytest.mark.private
+def test_decode_streaming_chinese_utf8():
+    model = get_test_model()
+    truth = "我很感谢你的热情"
+    all_input_ids = [
+        30672,
+        232,
+        193,
+        139,
+        233,
+        135,
+        162,
+        235,
+        179,
+        165,
+        30919,
+        30210,
+        234,
+        134,
+        176,
+        30993,
+    ]
+
+    decoded_text = ""
+    offset = 0
+    token_offset = 0
+    for i in range(len(all_input_ids)):
+        text, offset, token_offset = model.decode_token(
+            all_input_ids[: i + 1], offset, token_offset
+        )
+        decoded_text += text
+
+    assert decoded_text == truth

server/tests/models/test_seq2seq_lm.py

@@ -149,7 +149,7 @@ def test_seq2seq_lm_generate_token(default_seq2seq_lm, default_seq2seq_lm_batch)
     assert all([generation.generated_text is None for generation in generations])
     assert all([len(generation.prefill_tokens) == 1 for generation in generations])
     assert all([generation.token_id.item() == 259 for generation in generations])
-    assert all([generation.token_text == "" for generation in generations])
+    assert all([generation.token_text == " " for generation in generations])
     assert generations[0].request_id == 0
 
 

server/tests/utils/test_watermark.py

@@ -0,0 +1,54 @@
+# test_watermark_logits_processor.py
+
+import os
+import numpy as np
+import torch
+from text_generation_server.utils.watermark import WatermarkLogitsProcessor
+
+
+GAMMA = os.getenv("WATERMARK_GAMMA", 0.5)
+DELTA = os.getenv("WATERMARK_DELTA", 2.0)
+
+
+def test_seed_rng():
+    input_ids = [101, 2036, 3731, 102, 2003, 103]
+    processor = WatermarkLogitsProcessor()
+    processor._seed_rng(input_ids)
+    assert isinstance(processor.rng, torch.Generator)
+
+
+def test_get_greenlist_ids():
+    input_ids = [101, 2036, 3731, 102, 2003, 103]
+    processor = WatermarkLogitsProcessor()
+    result = processor._get_greenlist_ids(input_ids, 10, torch.device("cpu"))
+    assert max(result) <= 10
+    assert len(result) == int(10 * 0.5)
+
+
+def test_calc_greenlist_mask():
+    processor = WatermarkLogitsProcessor()
+    scores = torch.tensor([[0.5, 0.3, 0.2, 0.8], [0.1, 0.2, 0.7, 0.9]])
+    greenlist_token_ids = torch.tensor([2, 3])
+    result = processor._calc_greenlist_mask(scores, greenlist_token_ids)
+    assert result.tolist() == [[False, False, False, False], [False, False, True, True]]
+    assert result.shape == scores.shape
+
+
+def test_bias_greenlist_logits():
+    processor = WatermarkLogitsProcessor()
+    scores = torch.tensor([[0.5, 0.3, 0.2, 0.8], [0.1, 0.2, 0.7, 0.9]])
+    green_tokens_mask = torch.tensor(
+        [[False, False, True, True], [False, False, False, True]]
+    )
+    greenlist_bias = 2.0
+    result = processor._bias_greenlist_logits(scores, green_tokens_mask, greenlist_bias)
+    assert np.allclose(result.tolist(), [[0.5, 0.3, 2.2, 2.8], [0.1, 0.2, 0.7, 2.9]])
+    assert result.shape == scores.shape
+
+
+def test_call():
+    input_ids = [101, 2036, 3731, 102, 2003, 103]
+    processor = WatermarkLogitsProcessor()
+    scores = torch.tensor([[0.5, 0.3, 0.2, 0.8], [0.1, 0.2, 0.7, 0.9]])
+    result = processor(input_ids, scores)
+    assert result.shape == scores.shape

server/text_generation_server/cli.py

@@ -5,17 +5,23 @@ import typer
 from pathlib import Path
 from loguru import logger
 from typing import Optional
+from enum import Enum
 
 
 app = typer.Typer()
 
 
+class Quantization(str, Enum):
+    bitsandbytes = "bitsandbytes"
+    gptq = "gptq"
+
+
 @app.command()
 def serve(
     model_id: str,
     revision: Optional[str] = None,
     sharded: bool = False,
-    quantize: bool = False,
+    quantize: Optional[Quantization] = None,
     uds_path: Path = "/tmp/text-generation-server",
     logger_level: str = "INFO",
     json_output: bool = False,
@@ -55,6 +61,8 @@ def serve(
     if otlp_endpoint is not None:
         setup_tracing(shard=os.getenv("RANK", 0), otlp_endpoint=otlp_endpoint)
 
+    # Downgrade enum into str for easier management later on
+    quantize = None if quantize is None else quantize.value
     server.serve(model_id, revision, sharded, quantize, uds_path)
 
 
@@ -63,6 +71,7 @@ def download_weights(
     model_id: str,
     revision: Optional[str] = None,
     extension: str = ".safetensors",
+    auto_convert: bool = True,
     logger_level: str = "INFO",
     json_output: bool = False,
 ):
@@ -84,31 +93,55 @@ def download_weights(
     # Test if files were already download
     try:
         utils.weight_files(model_id, revision, extension)
-        logger.info(
+        logger.info("Files are already present on the host. " "Skipping download.")
-            "Files are already present in the local cache. " "Skipping download."
-        )
         return
     # Local files not found
-    except utils.LocalEntryNotFoundError:
+    except (utils.LocalEntryNotFoundError, FileNotFoundError):
         pass
 
-    # Download weights directly
+    is_local_model = (Path(model_id).exists() and Path(model_id).is_dir()) or os.getenv(
+        "WEIGHTS_CACHE_OVERRIDE", None
+    ) is not None
+
+    if not is_local_model:
+        # Try to download weights from the hub
+        try:
+            filenames = utils.weight_hub_files(model_id, revision, extension)
+            utils.download_weights(filenames, model_id, revision)
+            # Successfully downloaded weights
+            return
+
+        # No weights found on the hub with this extension
+        except utils.EntryNotFoundError as e:
+            # Check if we want to automatically convert to safetensors or if we can use .bin weights instead
+            if not extension == ".safetensors" or not auto_convert:
+                raise e
+
+    # Try to see if there are local pytorch weights
     try:
-        filenames = utils.weight_hub_files(model_id, revision, extension)
+        # Get weights for a local model, a hub cached model and inside the WEIGHTS_CACHE_OVERRIDE
-        utils.download_weights(filenames, model_id, revision)
+        local_pt_files = utils.weight_files(model_id, revision, ".bin")
-    except utils.EntryNotFoundError as e:
-        if not extension == ".safetensors":
-            raise e
 
-        logger.warning(
+    # No local pytorch weights
-            f"No safetensors weights found for model {model_id} at revision {revision}. "
+    except utils.LocalEntryNotFoundError:
-            f"Converting PyTorch weights instead."
+        if extension == ".safetensors":
-        )
+            logger.warning(
+                f"No safetensors weights found for model {model_id} at revision {revision}. "
+                f"Downloading PyTorch weights."
+            )
 
-        # Try to see if there are pytorch weights
+        # Try to see if there are pytorch weights on the hub
         pt_filenames = utils.weight_hub_files(model_id, revision, ".bin")
         # Download pytorch weights
         local_pt_files = utils.download_weights(pt_filenames, model_id, revision)
+
+    if auto_convert:
+        logger.warning(
+            f"No safetensors weights found for model {model_id} at revision {revision}. "
+            f"Converting PyTorch weights to safetensors."
+        )
+
+        # Safetensors final filenames
         local_st_files = [
             p.parent / f"{p.stem.lstrip('pytorch_')}.safetensors"
             for p in local_pt_files

server/text_generation_server/models/__init__.py

@@ -60,8 +60,6 @@ __all__ = [
     "GalacticaSharded",
     "GPTNeoxSharded",
     "Seq2SeqLM",
-    "Galactica",
-    "GalacticaSharded",
     "SantaCoder",
     "OPT",
     "OPTSharded",
@@ -95,7 +93,7 @@ torch.set_grad_enabled(False)
 
 
 def get_model(
-    model_id: str, revision: Optional[str], sharded: bool, quantize: bool
+    model_id: str, revision: Optional[str], sharded: bool, quantize: Optional[str]
 ) -> Model:
     if "facebook/galactica" in model_id:
         if sharded:
@@ -103,7 +101,7 @@ def get_model(
         else:
             return Galactica(model_id, revision, quantize=quantize)
 
-    if "bigcode" in model_id and os.environ.get("NO_FAST_MODEL") is None:
+    if model_id.startswith("bigcode/") and os.environ.get("NO_FAST_MODEL") is None:
         if sharded:
             if not FLASH_ATTENTION:
                 raise NotImplementedError(
@@ -119,6 +117,17 @@ def get_model(
     )
     model_type = config.model_type
 
+    if model_type == "gpt_bigcode":
+        if sharded:
+            if not FLASH_ATTENTION:
+                raise NotImplementedError(
+                    FLASH_ATT_ERROR_MESSAGE.format(f"Sharded Santacoder")
+                )
+            return FlashSantacoderSharded(model_id, revision, quantize=quantize)
+        else:
+            santacoder_cls = FlashSantacoder if FLASH_ATTENTION else SantaCoder
+            return santacoder_cls(model_id, revision, quantize=quantize)
+
     if model_type == "bloom":
         if sharded:
             return BLOOMSharded(model_id, revision, quantize=quantize)

server/text_generation_server/models/bloom.py

@@ -49,9 +49,14 @@ class BloomCausalLMBatch(CausalLMBatch):
 
 
 class BLOOM(CausalLM):
-    def __init__(self, model_id: str, revision: Optional[str] = None, quantize=False):
+    def __init__(
+        self,
+        model_id: str,
+        revision: Optional[str] = None,
+        quantize: Optional[str] = None,
+    ):
         super(BLOOM, self).__init__(
-            model_id=model_id, revision=revision, quantize=quantize, decode_buffer=1
+            model_id=model_id, revision=revision, quantize=quantize
         )
 
     @property
@@ -61,13 +66,15 @@ class BLOOM(CausalLM):
 
 class BLOOMSharded(BLOOM):
     def __init__(
-        self, model_id: str, revision: Optional[str] = None, quantize: bool = False
+        self,
+        model_id: str,
+        revision: Optional[str] = None,
+        quantize: Optional[str] = None,
     ):
-        self.process_group, self.rank, self.world_size = initialize_torch_distributed()
+        self.process_group, rank, world_size = initialize_torch_distributed()
-        self.master = self.rank == 0
         if torch.cuda.is_available():
-            device = torch.device(f"cuda:{self.rank}")
+            device = torch.device(f"cuda:{rank}")
-            dtype = torch.bfloat16 if torch.cuda.is_bf16_supported() else torch.float32
+            dtype = torch.float16
         else:
             device = torch.device("cpu")
             dtype = torch.float32
@@ -94,24 +101,25 @@ class BLOOMSharded(BLOOM):
             quantize=quantize,
             device=device,
             dtype=dtype,
-            rank=self.rank,
+            rank=rank,
-            world_size=self.world_size,
+            world_size=world_size,
         )
-        self.model = model.eval()
         torch.distributed.barrier(group=self.process_group)
         super(CausalLM, self).__init__(
+            model=model,
             tokenizer=tokenizer,
             requires_padding=True,
             dtype=dtype,
             device=device,
-            decode_buffer=1,
+            rank=rank,
+            world_size=world_size,
         )
 
     @staticmethod
     def load_weights(
         model,
         filenames: List[str],
-        quantize: bool,
+        quantize: Optional[str],
         device: torch.device,
         dtype: torch.dtype,
         rank: int,
@@ -120,7 +128,7 @@ class BLOOMSharded(BLOOM):
         parameters = dict(model.named_parameters())
         for file in filenames:
             with safe_open(
-                file, framework="pt", device=str(device) if not quantize else "cpu"
+                file, framework="pt", device=str(device) if quantize is None else "cpu"
             ) as f:
                 for name in f.keys():
                     full_name = f"transformer.{name}"
@@ -165,7 +173,7 @@ class BLOOMSharded(BLOOM):
 
                     tensor = tensor.contiguous().to(dtype)
 
-                    if quantize:
+                    if quantize == "bitsandbytes":
                         if not HAS_BITS_AND_BYTES:
                             raise ImportError(
                                 "bitsandbytes is not available on your machine either because it is not installed "
@@ -215,9 +223,14 @@ class BLOOMSharded(BLOOM):
                                 return linear
 
                             module.linear = replace_linear(state)
-
+                        elif quantize == "gptq":
-                        else:
+                            raise NotImplementedError(
+                                "`gptq` is not implemented for now"
+                            )
+                        elif quantize is None:
                             tensor = tensor.to(device)
+                        else:
+                            raise ValueError(f"Unexpected quantize `{quantize}`")
 
                     module._parameters[param_name] = tensor
                     if name == "word_embeddings.weight":

server/text_generation_server/models/causal_lm.py

@@ -35,8 +35,8 @@ class CausalLMBatch(Batch):
 
     # Lengths of all generations present in the batch
     input_lengths: List[int]
-    offsets: List[Optional[int]]
+    prefix_offsets: List[int]
-    token_offsets: List[Optional[int]]
+    read_offsets: List[int]
 
     # Generation helpers
     next_token_choosers: List[NextTokenChooser]
@@ -70,8 +70,8 @@ class CausalLMBatch(Batch):
         inputs = []
         next_token_choosers = []
         stopping_criterias = []
-        offsets = []
+        prefix_offsets = []
-        token_offsets = []
+        read_offsets = []
         requests_idx_mapping = {}
 
         # Parse batch
@@ -81,8 +81,6 @@ class CausalLMBatch(Batch):
         for i, r in enumerate(pb.requests):
             requests_idx_mapping[r.id] = i
             inputs.append(r.inputs)
-            offsets.append(None)
-            token_offsets.append(None)
             next_token_choosers.append(NextTokenChooser.from_pb(r.parameters, device))
             stopping_criteria = StoppingCriteria.from_pb(
                 r.stopping_parameters, tokenizer
@@ -102,6 +100,10 @@ class CausalLMBatch(Batch):
             truncation=True,
             max_length=max_truncation,
         ).to(device)
+        for _ in pb.requests:
+            input_len = tokenized_inputs["input_ids"].shape[1]
+            prefix_offsets.append(0)
+            read_offsets.append(input_len)
 
         input_lengths = tokenized_inputs["attention_mask"].sum(1)
         max_input_length = input_lengths.max()
@@ -130,8 +132,8 @@ class CausalLMBatch(Batch):
             past_key_values=None,
             all_input_ids=list(all_input_ids),
             input_lengths=input_lengths.tolist(),
-            offsets=offsets,
+            prefix_offsets=prefix_offsets,
-            token_offsets=token_offsets,
+            read_offsets=read_offsets,
             next_token_choosers=next_token_choosers,
             stopping_criterias=stopping_criterias,
             max_input_length=max_input_length.item(),
@@ -151,8 +153,8 @@ class CausalLMBatch(Batch):
         # New values after filtering
         requests_idx_mapping = {}
         input_lengths = []
-        offsets = []
+        prefix_offsets = []
-        token_offsets = []
+        read_offsets = []
         all_input_ids = []
         max_input_length = 0
 
@@ -167,8 +169,8 @@ class CausalLMBatch(Batch):
             requests_idx_mapping[r.id] = i
             keep_indices.append(idx)
 
-            offsets.append(self.offsets[idx])
+            prefix_offsets.append(self.prefix_offsets[idx])
-            token_offsets.append(self.token_offsets[idx])
+            read_offsets.append(self.read_offsets[idx])
             all_input_ids.append(self.all_input_ids[idx])
 
             request_input_length = self.input_lengths[idx]
@@ -225,8 +227,8 @@ class CausalLMBatch(Batch):
         self.position_ids = position_ids
         self.all_input_ids = all_input_ids
         self.input_lengths = input_lengths
-        self.offsets = offsets
+        self.prefix_offsets = prefix_offsets
-        self.token_offsets = token_offsets
+        self.read_offsets = read_offsets
         self.next_token_choosers = next_token_choosers
         self.stopping_criterias = stopping_criterias
         self.max_input_length = max_input_length
@@ -251,8 +253,8 @@ class CausalLMBatch(Batch):
         requests = []
         requests_idx_mapping = {}
         input_lengths = []
-        offsets = []
+        prefix_offsets = []
-        token_offsets = []
+        read_offsets = []
         all_input_ids = []
         next_token_choosers = []
         stopping_criterias = []
@@ -270,8 +272,8 @@ class CausalLMBatch(Batch):
         for i, batch in enumerate(batches):
             requests.extend(batch.requests)
             input_lengths.extend(batch.input_lengths)
-            offsets.extend(batch.offsets)
+            prefix_offsets.extend(batch.prefix_offsets)
-            token_offsets.extend(batch.token_offsets)
+            read_offsets.extend(batch.read_offsets)
             all_input_ids.extend(batch.all_input_ids)
             next_token_choosers.extend(batch.next_token_choosers)
             stopping_criterias.extend(batch.stopping_criterias)
@@ -428,8 +430,8 @@ class CausalLMBatch(Batch):
             past_key_values=past_key_values,
             all_input_ids=all_input_ids,
             input_lengths=input_lengths,
-            offsets=offsets,
+            prefix_offsets=prefix_offsets,
-            token_offsets=token_offsets,
+            read_offsets=read_offsets,
             next_token_choosers=next_token_choosers,
             stopping_criterias=stopping_criterias,
             max_input_length=max_input_length,
@@ -447,12 +449,11 @@ class CausalLM(Model):
         self,
         model_id: str,
         revision: Optional[str] = None,
-        quantize: bool = False,
+        quantize: Optional[str] = None,
-        decode_buffer: int = 3,
     ):
         if torch.cuda.is_available():
             device = torch.device("cuda")
-            dtype = torch.bfloat16 if torch.cuda.is_bf16_supported() else torch.float32
+            dtype = torch.float16
         else:
             if quantize:
                 raise ValueError("quantization is not available on CPU")
@@ -463,26 +464,26 @@ class CausalLM(Model):
         tokenizer = AutoTokenizer.from_pretrained(
             model_id, revision=revision, padding_side="left", truncation_side="left"
         )
-        self.model = AutoModelForCausalLM.from_pretrained(
+        model = AutoModelForCausalLM.from_pretrained(
             model_id,
             revision=revision,
             torch_dtype=dtype,
             device_map="auto" if torch.cuda.is_available() else None,
-            load_in_8bit=quantize,
+            load_in_8bit=quantize == "bitsandbytes",
             trust_remote_code=True,
-        ).eval()
+        )
         tokenizer.pad_token_id = (
-            self.model.config.pad_token_id
+            model.config.pad_token_id
-            if self.model.config.pad_token_id is not None
+            if model.config.pad_token_id is not None
-            else self.model.config.eos_token_id
+            else model.config.eos_token_id
         )
 
         super(CausalLM, self).__init__(
+            model=model,
             tokenizer=tokenizer,
             requires_padding=True,
             dtype=dtype,
             device=device,
-            decode_buffer=decode_buffer,
         )
 
     @property
@@ -491,7 +492,7 @@ class CausalLM(Model):
 
     def decode(self, generated_ids: List[int]) -> str:
         return self.tokenizer.decode(
-            generated_ids, skip_special_tokens=True, cleanup_tokenization_spaces=False
+            generated_ids, skip_special_tokens=True, clean_up_tokenization_spaces=False
         )
 
     def forward(
@@ -529,8 +530,8 @@ class CausalLM(Model):
         iterator = zip(
             batch.requests,
             batch.input_lengths,
-            batch.offsets,
+            batch.prefix_offsets,
-            batch.token_offsets,
+            batch.read_offsets,
             logits,
             batch.next_token_choosers,
             batch.stopping_criterias,
@@ -541,8 +542,8 @@ class CausalLM(Model):
         for i, (
             request,
             input_length,
-            offset,
+            prefix_offset,
-            token_offset,
+            read_offset,
             logits,
             next_token_chooser,
             stopping_criteria,
@@ -550,7 +551,7 @@ class CausalLM(Model):
         ) in enumerate(iterator):
             # Select next token
             next_token_id, logprobs = next_token_chooser(
-                all_input_ids.view(1, -1), logits
+                all_input_ids.view(1, -1), logits[-1:, :]
             )
 
             # Append next token to all tokens
@@ -560,8 +561,8 @@ class CausalLM(Model):
             # Generated token
             next_token_logprob = logprobs[-1, next_token_id]
             next_token_id_squeezed = next_token_id.squeeze()
-            next_token_text, offset, token_offset = self.decode_token(
+            next_token_text, prefix_offset, read_offset = self.decode_token(
-                all_input_ids[:, 0], offset, token_offset
+                all_input_ids[:, 0], prefix_offset, read_offset
             )
 
             # Evaluate stopping criteria
@@ -570,61 +571,67 @@ class CausalLM(Model):
                 next_token_text,
             )
 
-            if stop:
+            if not stop:
-                # Decode generated tokens
-                output_text = self.decode(
-                    all_input_ids[-stopping_criteria.current_tokens :, 0]
-                )
-                # Get seed
-                if isinstance(next_token_chooser.choice, Sampling):
-                    seed = next_token_chooser.choice.seed
-                else:
-                    seed = None
-
-                generated_text = GeneratedText(
-                    output_text, stopping_criteria.current_tokens, reason, seed
-                )
-            else:
-                # Keep request in the batch
-                generated_text = None
                 stopped = False
 
-            # Prefill
+            # Shard generations
-            if stopping_criteria.current_tokens == 1:
+            # All generations will be appended in the rust sharded client
-                # Remove generated token to only have prefill and add nan for first prompt token
+            if i % self.world_size == self.rank:
-                prefill_logprobs = [float("nan")] + logprobs.gather(
+                if stop:
-                    1, all_input_ids[1:]
+                    # Decode generated tokens
-                ).squeeze(1)[-new_input_length:-1].tolist()
+                    output_text = self.decode(
-                prefill_token_ids = all_input_ids[-new_input_length:-1]
+                        all_input_ids[-stopping_criteria.current_tokens :, 0]
-                prefill_texts = self.tokenizer.batch_decode(
+                    )
-                    prefill_token_ids,
+                    # Get seed
-                    clean_up_tokenization_spaces=False,
+                    if isinstance(next_token_chooser.choice, Sampling):
-                    skip_special_tokens=False,
+                        seed = next_token_chooser.choice.seed
-                )
+                    else:
-                prefill_tokens = PrefillTokens(
+                        seed = None
-                    prefill_token_ids, prefill_logprobs, prefill_texts
-                )
-            else:
-                prefill_tokens = None
 
-            generation = Generation(
+                    generated_text = GeneratedText(
-                request.id,
+                        output_text, stopping_criteria.current_tokens, reason, seed
-                prefill_tokens,
+                    )
-                next_token_id_squeezed,
+                else:
-                next_token_logprob,
+                    generated_text = None
-                next_token_text,
-                next_token_id_squeezed.item() in self.all_special_ids,
-                generated_text,
-            )
 
-            generations.append(generation)
+                # Prefill
+                if stopping_criteria.current_tokens == 1:
+                    # Remove generated token to only have prefill and add nan for first prompt token
+                    prefill_logprobs = [float("nan")] + torch.log_softmax(
+                        logits, -1
+                    ).gather(1, all_input_ids[1:]).squeeze(1)[
+                        -new_input_length:-1
+                    ].tolist()
+                    prefill_token_ids = all_input_ids[-new_input_length:-1]
+                    prefill_texts = self.tokenizer.batch_decode(
+                        prefill_token_ids,
+                        clean_up_tokenization_spaces=False,
+                        skip_special_tokens=False,
+                    )
+                    prefill_tokens = PrefillTokens(
+                        prefill_token_ids, prefill_logprobs, prefill_texts
+                    )
+                else:
+                    prefill_tokens = None
+
+                generation = Generation(
+                    request.id,
+                    prefill_tokens,
+                    next_token_id_squeezed,
+                    next_token_logprob,
+                    next_token_text,
+                    next_token_id_squeezed.item() in self.all_special_ids,
+                    generated_text,
+                )
+
+                generations.append(generation)
 
             # Update values
             batch.input_ids[i, 0] = next_token_id
             batch.all_input_ids[i] = all_input_ids
             batch.input_lengths[i] = new_input_length
-            batch.offsets[i] = offset
+            batch.prefix_offsets[i] = prefix_offset
-            batch.token_offsets[i] = token_offset
+            batch.read_offsets[i] = read_offset
             batch.max_input_length = max(batch.max_input_length, new_input_length)
 
         # We finished all generations in the batch; there is no next batch

server/text_generation_server/models/custom_modeling/flash_llama_modeling.py

@@ -21,24 +21,21 @@
 import torch
 import torch.distributed
 
-from torch.nn import functional as F
-
 from torch import nn
 from transformers.activations import ACT2FN
 from typing import Optional
 
 # Flash attention imports
-import rotary_emb
 import flash_attn_cuda
 import dropout_layer_norm
 
-from flash_attn.layers.rotary import RotaryEmbedding
+from text_generation_server.utils.layers import (
-
+    FastLinear,
-HAS_BITS_AND_BYTES = True
+    TensorParallelRowLinear,
-try:
+    TensorParallelColumnLinear,
-    from bitsandbytes.nn import Linear8bitLt
+    TensorParallelEmbedding,
-except ImportError as e:
+    PositionRotaryEmbedding,
-    HAS_BITS_AND_BYTES = False
+)
 
 
 class LlamaRMSNorm(nn.Module):
@@ -91,212 +88,6 @@ class LlamaRMSNorm(nn.Module):
             return normed_hidden_states, res
 
 
-class FastLinear(nn.Linear):
-    def __init__(
-        self,
-        in_features: int,
-        out_features: int,
-        bias: bool = True,
-        device=None,
-        dtype=None,
-    ) -> None:
-        super(FastLinear, self).__init__(in_features, out_features, bias, device, dtype)
-        self.quantized = False
-        self.bnb_linear = None
-
-    def prepare_weights(self, quantize: bool = False):
-        if quantize:
-            if not HAS_BITS_AND_BYTES:
-                raise ImportError(
-                    "bitsandbytes is not available on your machine either because it is not installed "
-                    "or you don't have a GPU.\n"
-                    "You can install it with `pip install bitsandbytes`."
-                )
-
-            self.quantized = True
-            self.bnb_linear = Linear8bitLt(
-                self.in_features,
-                self.out_features,
-                has_fp16_weights=False,
-                threshold=6.0,
-                bias=False,
-            )
-            # Copy data to bnb_linear
-            self.bnb_linear.weight.data = self.weight.data
-            if self.bias is not None:
-                self.bnb_linear.bias = nn.Parameter(self.bias)
-
-            # Delete reference to data
-            self.weight = None
-            self.bias = None
-        else:
-            self.weight = nn.Parameter(self.weight.T)
-
-    def forward(self, input: torch.Tensor) -> torch.Tensor:
-        if self.quantized:
-            return self.bnb_linear(input)
-        else:
-            if self.bias is not None:
-                return torch.addmm(self.bias, input, self.weight)
-            return torch.matmul(input, self.weight)
-
-
-class TensorParallelColumnLinear(FastLinear):
-    def __init__(
-        self,
-        in_features,
-        out_features,
-        process_group: torch.distributed.ProcessGroup,
-        bias=True,
-        device=None,
-        dtype=None,
-    ):
-        self.process_group = process_group
-        self.tp_world_size = process_group.size()
-        assert out_features % self.tp_world_size == 0
-        out_features = out_features // self.tp_world_size
-
-        super().__init__(
-            in_features=in_features,
-            out_features=out_features,
-            bias=bias,
-            device=device,
-            dtype=dtype,
-        )
-
-
-class TensorParallelRowLinear(FastLinear):
-    def __init__(
-        self,
-        in_features,
-        out_features,
-        process_group: torch.distributed.ProcessGroup,
-        reduce=True,
-        bias=True,
-        device=None,
-        dtype=None,
-    ):
-        self.process_group = process_group
-        self.tp_world_size = process_group.size()
-        self.reduce = reduce
-        assert in_features % self.tp_world_size == 0
-        in_features = in_features // self.tp_world_size
-
-        super().__init__(
-            in_features=in_features,
-            out_features=out_features,
-            bias=bias,
-            device=device,
-            dtype=dtype,
-        )
-
-    def forward(self, input: torch.Tensor) -> torch.Tensor:
-        out = super(TensorParallelRowLinear, self).forward(input)
-        if self.reduce:
-            torch.distributed.all_reduce(out, group=self.process_group)
-
-        return out
-
-
-class TensorParallelEmbedding(nn.Embedding):
-    def __init__(
-        self,
-        num_embeddings,
-        embedding_dim,
-        process_group: torch.distributed.ProcessGroup,
-        padding_idx=None,
-        max_norm=None,
-        norm_type=2.0,
-        scale_grad_by_freq=False,
-        sparse=False,
-        _weight=None,
-        device=None,
-        dtype=None,
-    ):
-        self.process_group = process_group
-        self.tp_rank = process_group.rank()
-        self.tp_world_size = process_group.size()
-
-        self.original_num_embeddings = num_embeddings
-
-        assert num_embeddings % self.tp_world_size == 0
-        block_size = num_embeddings // self.tp_world_size
-        # inputs in `[min_id, max_id[` are handled by `self` to get embeddings
-        self.min_id = self.tp_rank * block_size
-        self.max_id = (self.tp_rank + 1) * block_size
-
-        # Additional entry that will map to zero
-        # Used for masking
-        self.null_idx = block_size
-
-        super().__init__(
-            block_size,
-            embedding_dim,
-            padding_idx=padding_idx,
-            max_norm=max_norm,
-            norm_type=norm_type,
-            scale_grad_by_freq=scale_grad_by_freq,
-            sparse=sparse,
-            _weight=_weight,
-            device=device,
-            dtype=dtype,
-        )
-
-    def add_null_idx(self):
-        """Additional 0 entry used for masking"""
-        self.weight = nn.Parameter(F.pad(self.weight, (0, 0, 0, 1)))
-
-    def forward(self, input: torch.Tensor) -> torch.Tensor:
-        # default all out of bounds values to `self.null_idx` that will then be mapped to 0
-        # translate for [0, self.max_id - self.min_id[
-        input = torch.where(
-            (self.min_id > input) | (input >= self.max_id),
-            self.null_idx,
-            input - self.min_id,
-        )
-        out = super().forward(input)
-        torch.distributed.all_reduce(out, group=self.process_group)
-        return out
-
-
-class PositionRotaryEmbedding(RotaryEmbedding):
-    def _update_cos_sin_cache(self, dtype, device, seqlen):
-        # Reset the tables if the sequence length has changed,
-        # or if we're on a new device (possibly due to tracing for instance)
-        if (
-            seqlen > self._seq_len_cached
-            or self._cos_cached.device != device
-            or self._cos_cached.dtype != dtype
-        ):
-            self._seq_len_cached = seqlen
-            t = torch.arange(seqlen, device=device, dtype=self.inv_freq.dtype)
-            freqs = torch.outer(t, self.inv_freq.to(device=t.device))
-            self._cos_cached = torch.cos(freqs).to(dtype)
-            self._sin_cached = torch.sin(freqs).to(dtype)
-
-    def get_cos_sin(self, position_ids: torch.Tensor, max_s: int, dtype: torch.dtype):
-        """
-        Return cos and sin for the asked position ids
-        """
-
-        self._update_cos_sin_cache(dtype, position_ids.device, max_s)
-
-        cos = torch.index_select(self._cos_cached, 0, position_ids)
-        sin = torch.index_select(self._sin_cached, 0, position_ids)
-        return cos.unsqueeze(1), sin.unsqueeze(1)
-
-    def forward(self, qkv: torch.Tensor, cos: torch.Tensor, sin: torch.Tensor):
-        rotary_dim = cos.shape[-1]
-        q1 = qkv[:, 0, :, :rotary_dim]
-        q2 = qkv[:, 0, :, rotary_dim : 2 * rotary_dim]
-        k1 = qkv[:, 1, :, :rotary_dim]
-        k2 = qkv[:, 1, :, rotary_dim : 2 * rotary_dim]
-
-        rotary_emb.apply_rotary(q1, q2, cos, sin, q1, q2, False)
-        rotary_emb.apply_rotary(k1, k2, cos, sin, k1, k2, False)
-        return qkv
-
-
 class FlashLlamaAttention(torch.nn.Module):
     def __init__(
         self,
@@ -539,21 +330,22 @@ class FlashLlamaModel(torch.nn.Module):
         self.head_size = self.layers[0].self_attn.head_size
         self.num_heads = self.layers[0].self_attn.num_heads
 
-    def post_load_weights(self, load_in_8bit: bool = False):
+    def post_load_weights(self, quantize: Optional[str] = None):
         if isinstance(self.embed_tokens, TensorParallelEmbedding):
             self.embed_tokens.add_null_idx()
         for layer in self.layers:
             layer: FlashLlamaLayer
-            layer.self_attn.query_key_value.prepare_weights(load_in_8bit)
+            layer.self_attn.query_key_value.prepare_weights(quantize)
-            layer.self_attn.o_proj.prepare_weights(load_in_8bit)
+            layer.self_attn.o_proj.prepare_weights(quantize)
-            layer.mlp.gate_up_proj.prepare_weights(load_in_8bit)
+            layer.mlp.gate_up_proj.prepare_weights(quantize)
-            layer.mlp.down_proj.prepare_weights(load_in_8bit)
+            layer.mlp.down_proj.prepare_weights(quantize)
 
     def forward(
         self,
         input_ids,
         position_ids,
         cu_seqlens,
+        cu_seqlens_q,
         max_s,
         past_key_values: Optional[torch.Tensor] = None,
         pre_allocate_past_size: Optional[int] = None,
@@ -575,15 +367,11 @@ class FlashLlamaModel(torch.nn.Module):
                 )
             )
             layer_past_present_indices = None
-            cu_seqlens_q = None
             slice_past_index = len(hidden_states)
         # Decode
         else:
             # Create indices from cumulative sequence lengths
             layer_past_present_indices = cu_seqlens[1:] - 1
-            cu_seqlens_q = torch.arange(
-                cu_seqlens.shape[0], dtype=torch.int32, device=hidden_states.device
-            )
             slice_past_index = None
 
         # Get rotary cos and sin for this forward
@@ -625,10 +413,8 @@ class FlashLlamaForCausalLM(torch.nn.Module):
         self.process_group = process_group
         if self.process_group is not None:
             self.world_size = self.process_group.size()
-            self.rank = self.process_group.rank()
         else:
             self.world_size = 1
-            self.rank = 0
 
         self.model = FlashLlamaModel(config, process_group)
 
@@ -641,8 +427,8 @@ class FlashLlamaForCausalLM(torch.nn.Module):
         else:
             self.lm_head = FastLinear(config.hidden_size, config.vocab_size, bias=False)
 
-    def post_load_weights(self, load_in_8bit: bool = False):
+    def post_load_weights(self, quantize: Optional[str] = None):
-        self.model.post_load_weights(load_in_8bit)
+        self.model.post_load_weights(quantize)
         self.lm_head.prepare_weights()
 
     def forward(
@@ -650,6 +436,7 @@ class FlashLlamaForCausalLM(torch.nn.Module):
         input_ids,
         position_ids,
         cu_seqlens,
+        cu_seqlens_q,
         max_s,
         past_key_values: Optional[torch.Tensor] = None,
         pre_allocate_past_size: Optional[int] = None,
@@ -658,6 +445,7 @@ class FlashLlamaForCausalLM(torch.nn.Module):
             input_ids,
             position_ids,
             cu_seqlens,
+            cu_seqlens_q,
             max_s,
             past_key_values,
             pre_allocate_past_size,

server/text_generation_server/models/custom_modeling/flash_neox_modeling.py

@@ -21,8 +21,6 @@
 import torch
 import torch.distributed
 
-from torch.nn import functional as F
-
 from torch import nn
 from transformers.activations import ACT2FN
 from transformers.modeling_utils import PreTrainedModel
@@ -30,261 +28,16 @@ from transformers.models.gpt_neox import GPTNeoXConfig
 from typing import Optional
 
 # Flash attention imports
-import rotary_emb
 import flash_attn_cuda
-import dropout_layer_norm
 
-from flash_attn.layers.rotary import RotaryEmbedding
+from text_generation_server.utils.layers import (
-
+    FastLinear,
-HAS_BITS_AND_BYTES = True
+    TensorParallelRowLinear,
-try:
+    TensorParallelColumnLinear,
-    from bitsandbytes.nn import Linear8bitLt
+    TensorParallelEmbedding,
-except ImportError as e:
+    FastLayerNorm,
-    HAS_BITS_AND_BYTES = False
+    PositionRotaryEmbedding,
-
+)
-
-class FastLayerNorm(nn.LayerNorm):
-    def forward(self, hidden_states, residual=None):
-        if hidden_states.shape[-1] > 8192:
-            if residual is not None:
-                hidden_states += residual
-            residual = hidden_states
-
-            return super(FastLayerNorm, self).forward(hidden_states), residual
-        else:
-            (
-                normed_hidden_states,
-                residual,
-                *rest,
-            ) = dropout_layer_norm.dropout_add_ln_fwd(
-                hidden_states,
-                residual,
-                self.weight,
-                self.bias,
-                None,
-                None,
-                None,
-                None,
-                0.0,
-                self.eps,
-                1.0,
-                0,
-                None,
-                False,
-                False,
-            )
-            if residual is None:
-                residual = hidden_states
-
-            return normed_hidden_states, residual
-
-
-class FastLinear(nn.Linear):
-    def __init__(
-        self,
-        in_features: int,
-        out_features: int,
-        bias: bool = True,
-        device=None,
-        dtype=None,
-    ) -> None:
-        super(FastLinear, self).__init__(in_features, out_features, bias, device, dtype)
-        self.quantized = False
-        self.bnb_linear = None
-
-    def prepare_weights(self, quantize: bool = False):
-        if quantize:
-            if not HAS_BITS_AND_BYTES:
-                raise ImportError(
-                    "bitsandbytes is not available on your machine either because it is not installed "
-                    "or you don't have a GPU.\n"
-                    "You can install it with `pip install bitsandbytes`."
-                )
-
-            self.quantized = True
-            self.bnb_linear = Linear8bitLt(
-                self.in_features,
-                self.out_features,
-                has_fp16_weights=False,
-                threshold=6.0,
-                bias=False,
-            )
-            # Copy data to bnb_linear
-            self.bnb_linear.weight.data = self.weight.data
-            if self.bias is not None:
-                self.bnb_linear.bias = nn.Parameter(self.bias)
-
-            # Delete reference to data
-            self.weight = None
-            self.bias = None
-        else:
-            self.weight = nn.Parameter(self.weight.T)
-
-    def forward(self, input: torch.Tensor) -> torch.Tensor:
-        if self.quantized:
-            return self.bnb_linear(input)
-        else:
-            if self.bias is not None:
-                return torch.addmm(self.bias, input, self.weight)
-            return torch.matmul(input, self.weight)
-
-
-class TensorParallelColumnLinear(FastLinear):
-    def __init__(
-        self,
-        in_features,
-        out_features,
-        process_group: torch.distributed.ProcessGroup,
-        bias=True,
-        device=None,
-        dtype=None,
-    ):
-        self.process_group = process_group
-        self.tp_world_size = process_group.size()
-        assert out_features % self.tp_world_size == 0
-        out_features = out_features // self.tp_world_size
-
-        super().__init__(
-            in_features=in_features,
-            out_features=out_features,
-            bias=bias,
-            device=device,
-            dtype=dtype,
-        )
-
-
-class TensorParallelRowLinear(FastLinear):
-    def __init__(
-        self,
-        in_features,
-        out_features,
-        process_group: torch.distributed.ProcessGroup,
-        reduce=True,
-        bias=True,
-        device=None,
-        dtype=None,
-    ):
-        self.process_group = process_group
-        self.tp_world_size = process_group.size()
-        self.reduce = reduce
-        assert in_features % self.tp_world_size == 0
-        in_features = in_features // self.tp_world_size
-
-        super().__init__(
-            in_features=in_features,
-            out_features=out_features,
-            bias=bias,
-            device=device,
-            dtype=dtype,
-        )
-
-    def forward(self, input: torch.Tensor) -> torch.Tensor:
-        out = super(TensorParallelRowLinear, self).forward(input)
-        if self.reduce:
-            torch.distributed.all_reduce(out, group=self.process_group)
-
-        return out
-
-
-class TensorParallelEmbedding(nn.Embedding):
-    def __init__(
-        self,
-        num_embeddings,
-        embedding_dim,
-        process_group: torch.distributed.ProcessGroup,
-        padding_idx=None,
-        max_norm=None,
-        norm_type=2.0,
-        scale_grad_by_freq=False,
-        sparse=False,
-        _weight=None,
-        device=None,
-        dtype=None,
-    ):
-        self.process_group = process_group
-        self.tp_rank = process_group.rank()
-        self.tp_world_size = process_group.size()
-
-        self.original_num_embeddings = num_embeddings
-
-        assert num_embeddings % self.tp_world_size == 0
-        block_size = num_embeddings // self.tp_world_size
-        # inputs in `[min_id, max_id[` are handled by `self` to get embeddings
-        self.min_id = self.tp_rank * block_size
-        self.max_id = (self.tp_rank + 1) * block_size
-
-        # Additional entry that will map to zero
-        # Used for masking
-        self.null_idx = block_size
-
-        super().__init__(
-            block_size,
-            embedding_dim,
-            padding_idx=padding_idx,
-            max_norm=max_norm,
-            norm_type=norm_type,
-            scale_grad_by_freq=scale_grad_by_freq,
-            sparse=sparse,
-            _weight=_weight,
-            device=device,
-            dtype=dtype,
-        )
-
-    def add_null_idx(self):
-        """Additional 0 entry used for masking"""
-        self.weight = nn.Parameter(F.pad(self.weight, (0, 0, 0, 1)))
-
-    def forward(self, input: torch.Tensor) -> torch.Tensor:
-        # default all out of bounds values to `self.null_idx` that will then be mapped to 0
-        # translate for [0, self.max_id - self.min_id[
-        input = torch.where(
-            (self.min_id > input) | (input >= self.max_id),
-            self.null_idx,
-            input - self.min_id,
-        )
-        out = super().forward(input)
-        torch.distributed.all_reduce(out, group=self.process_group)
-        return out
-
-
-class PositionRotaryEmbedding(RotaryEmbedding):
-    def _update_cos_sin_cache(self, dtype, device, seqlen):
-        # Reset the tables if the sequence length has changed,
-        # or if we're on a new device (possibly due to tracing for instance)
-        if (
-            seqlen > self._seq_len_cached
-            or self._cos_cached.device != device
-            or self._cos_cached.dtype != dtype
-        ):
-            self._seq_len_cached = seqlen
-            t = torch.arange(seqlen, device=device, dtype=self.inv_freq.dtype)
-            # Don't do einsum, it converts fp32 to fp16
-            # freqs = torch.einsum("i,j->ij", t, self.inv_freq)
-            freqs = torch.outer(t, self.inv_freq.to(device=t.device))
-            self._cos_cached = torch.cos(freqs).to(dtype)
-            self._sin_cached = torch.sin(freqs).to(dtype)
-
-    def get_cos_sin(self, position_ids: torch.Tensor, max_s: int, dtype: torch.dtype):
-        """
-        Return cos and sin for the asked position ids
-        """
-
-        self._update_cos_sin_cache(dtype, position_ids.device, max_s)
-
-        cos = torch.index_select(self._cos_cached, 0, position_ids)
-        sin = torch.index_select(self._sin_cached, 0, position_ids)
-        return cos.unsqueeze(1), sin.unsqueeze(1)
-
-    def forward(self, qkv: torch.Tensor, cos: torch.Tensor, sin: torch.Tensor):
-        rotary_dim = cos.shape[-1]
-        q1 = qkv[:, 0, :, :rotary_dim]
-        q2 = qkv[:, 0, :, rotary_dim : 2 * rotary_dim]
-        k1 = qkv[:, 1, :, :rotary_dim]
-        k2 = qkv[:, 1, :, rotary_dim : 2 * rotary_dim]
-
-        rotary_emb.apply_rotary(q1, q2, cos, sin, q1, q2, False)
-        rotary_emb.apply_rotary(k1, k2, cos, sin, k1, k2, False)
-        return qkv
 
 
 class FlashNeoxAttention(torch.nn.Module):
@@ -589,16 +342,16 @@ class FlashGPTNeoXModel(FlashGPTNeoXPreTrainedModel):
         self.head_size = self.layers[0].attention.head_size
         self.num_heads = self.layers[0].attention.num_heads
 
-    def post_load_weights(self, load_in_8bit=False):
+    def post_load_weights(self, quantize: Optional[str] = None):
         if isinstance(self.embed_in, TensorParallelEmbedding):
             self.embed_in.add_null_idx()
         for layer in self.layers:
             layer: FlashNeoXLayer
             layer.attention.shuffle_qkv_dims()
-            layer.attention.query_key_value.prepare_weights(load_in_8bit)
+            layer.attention.query_key_value.prepare_weights(quantize)
-            layer.attention.dense.prepare_weights(load_in_8bit)
+            layer.attention.dense.prepare_weights(quantize)
-            layer.mlp.dense_h_to_4h.prepare_weights(load_in_8bit)
+            layer.mlp.dense_h_to_4h.prepare_weights(quantize)
-            layer.mlp.dense_4h_to_h.prepare_weights(load_in_8bit)
+            layer.mlp.dense_4h_to_h.prepare_weights(quantize)
 
     @classmethod
     def from_pretrained(cls, pretrained_model_name_or_path, *model_args, **kwargs):
@@ -617,6 +370,7 @@ class FlashGPTNeoXModel(FlashGPTNeoXPreTrainedModel):
         input_ids,
         position_ids,
         cu_seqlens,
+        cu_seqlens_q,
         max_s,
         past_key_values=None,
         pre_allocate_past_size: Optional[int] = None,
@@ -638,15 +392,11 @@ class FlashGPTNeoXModel(FlashGPTNeoXPreTrainedModel):
                 )
             )
             layer_past_present_indices = None
-            cu_seqlens_q = None
             slice_past_index = len(hidden_states)
         # Decode
         else:
             # Create indices from cumulative sequence lengths
             layer_past_present_indices = cu_seqlens[1:] - 1
-            cu_seqlens_q = torch.arange(
-                cu_seqlens.shape[0], dtype=torch.int32, device=hidden_states.device
-            )
             slice_past_index = None
 
         # Get rotary cos and sin for this forward
@@ -688,10 +438,8 @@ class FlashGPTNeoXForCausalLM(FlashGPTNeoXPreTrainedModel):
         self.process_group = process_group
         if self.process_group is not None:
             self.world_size = self.process_group.size()
-            self.rank = self.process_group.rank()
         else:
             self.world_size = 1
-            self.rank = 0
 
         self.gpt_neox = FlashGPTNeoXModel(config, process_group)
 
@@ -706,8 +454,8 @@ class FlashGPTNeoXForCausalLM(FlashGPTNeoXPreTrainedModel):
                 config.hidden_size, config.vocab_size, bias=False
             )
 
-    def post_load_weights(self, load_in_8bit=False):
+    def post_load_weights(self, quantize: Optional[str] = None):
-        self.gpt_neox.post_load_weights(load_in_8bit)
+        self.gpt_neox.post_load_weights(quantize)
         self.embed_out.prepare_weights()
 
     @classmethod
@@ -726,6 +474,7 @@ class FlashGPTNeoXForCausalLM(FlashGPTNeoXPreTrainedModel):
         input_ids,
         position_ids,
         cu_seqlens,
+        cu_seqlens_q,
         max_s,
         past_key_values: Optional[torch.Tensor] = None,
         pre_allocate_past_size: Optional[int] = None,
@@ -734,6 +483,7 @@ class FlashGPTNeoXForCausalLM(FlashGPTNeoXPreTrainedModel):
             input_ids,
             position_ids,
             cu_seqlens,
+            cu_seqlens_q,
             max_s,
             past_key_values,
             pre_allocate_past_size,

server/text_generation_server/models/custom_modeling/flash_santacoder_modeling.py

@@ -1,228 +1,19 @@
 import torch
 import torch.distributed
 
-import torch.nn.functional as F
-
 from torch import nn
 from transformers.activations import ACT2FN
 from typing import Optional
 
 # Flash attention imports
 import flash_attn_cuda
-import dropout_layer_norm
+from text_generation_server.utils.layers import (
-
+    FastLinear,
-HAS_BITS_AND_BYTES = True
+    TensorParallelRowLinear,
-try:
+    TensorParallelColumnLinear,
-    from bitsandbytes.nn import Linear8bitLt
+    TensorParallelEmbedding,
-except ImportError as e:
+    FastLayerNorm,
-    HAS_BITS_AND_BYTES = False
+)
-
-
-class FastLayerNorm(nn.LayerNorm):
-    def forward(self, hidden_states, residual=None):
-        if hidden_states.shape[-1] > 8192:
-            if residual is not None:
-                hidden_states += residual
-            residual = hidden_states
-
-            return super(FastLayerNorm, self).forward(hidden_states), residual
-        else:
-            (
-                normed_hidden_states,
-                residual,
-                *rest,
-            ) = dropout_layer_norm.dropout_add_ln_fwd(
-                hidden_states,
-                residual,
-                self.weight,
-                self.bias,
-                None,
-                None,
-                None,
-                None,
-                0.0,
-                self.eps,
-                1.0,
-                0,
-                None,
-                False,
-                False,
-            )
-            if residual is None:
-                residual = hidden_states
-
-            return normed_hidden_states, residual
-
-
-class FastLinear(nn.Linear):
-    def __init__(
-        self,
-        in_features: int,
-        out_features: int,
-        bias: bool = True,
-        device=None,
-        dtype=None,
-    ) -> None:
-        super(FastLinear, self).__init__(in_features, out_features, bias, device, dtype)
-        self.quantized = False
-        self.bnb_linear = None
-
-    def prepare_weights(self, quantize: bool = False):
-        if quantize:
-            if not HAS_BITS_AND_BYTES:
-                raise ImportError(
-                    "bitsandbytes is not available on your machine either because it is not installed "
-                    "or you don't have a GPU.\n"
-                    "You can install it with `pip install bitsandbytes`."
-                )
-
-            self.quantized = True
-            self.bnb_linear = Linear8bitLt(
-                self.in_features,
-                self.out_features,
-                has_fp16_weights=False,
-                threshold=6.0,
-                bias=False,
-            )
-            # Copy data to bnb_linear
-            self.bnb_linear.weight.data = self.weight.data
-            if self.bias is not None:
-                self.bnb_linear.bias = nn.Parameter(self.bias)
-
-            # Delete reference to data
-            self.weight = None
-            self.bias = None
-        else:
-            self.weight = nn.Parameter(self.weight.T)
-
-    def forward(self, input: torch.Tensor) -> torch.Tensor:
-        if self.quantized:
-            return self.bnb_linear(input)
-        else:
-            if self.bias is not None:
-                return torch.addmm(self.bias, input, self.weight)
-            return torch.matmul(input, self.weight)
-
-
-class TensorParallelColumnLinear(FastLinear):
-    def __init__(
-        self,
-        in_features,
-        out_features,
-        process_group: torch.distributed.ProcessGroup,
-        bias=True,
-        device=None,
-        dtype=None,
-    ):
-        self.process_group = process_group
-        self.tp_world_size = process_group.size()
-        assert out_features % self.tp_world_size == 0
-        out_features = out_features // self.tp_world_size
-
-        super().__init__(
-            in_features=in_features,
-            out_features=out_features,
-            bias=bias,
-            device=device,
-            dtype=dtype,
-        )
-
-
-class TensorParallelRowLinear(FastLinear):
-    def __init__(
-        self,
-        in_features,
-        out_features,
-        process_group: torch.distributed.ProcessGroup,
-        reduce=True,
-        bias=True,
-        device=None,
-        dtype=None,
-    ):
-        self.process_group = process_group
-        self.tp_world_size = process_group.size()
-        self.reduce = reduce
-        assert in_features % self.tp_world_size == 0
-        in_features = in_features // self.tp_world_size
-
-        super().__init__(
-            in_features=in_features,
-            out_features=out_features,
-            bias=bias,
-            device=device,
-            dtype=dtype,
-        )
-
-    def forward(self, input: torch.Tensor) -> torch.Tensor:
-        out = super(TensorParallelRowLinear, self).forward(input)
-        if self.reduce:
-            torch.distributed.all_reduce(out, group=self.process_group)
-
-        return out
-
-
-class TensorParallelEmbedding(nn.Embedding):
-    def __init__(
-        self,
-        num_embeddings,
-        embedding_dim,
-        process_group: torch.distributed.ProcessGroup,
-        reduce=True,
-        padding_idx=None,
-        max_norm=None,
-        norm_type=2.0,
-        scale_grad_by_freq=False,
-        sparse=False,
-        _weight=None,
-        device=None,
-        dtype=None,
-    ):
-        self.process_group = process_group
-        self.tp_rank = process_group.rank()
-        self.tp_world_size = process_group.size()
-        self.reduce = reduce
-
-        self.original_num_embeddings = num_embeddings
-
-        assert num_embeddings % self.tp_world_size == 0
-        block_size = num_embeddings // self.tp_world_size
-        # inputs in `[min_id, max_id[` are handled by `self` to get embeddings
-        self.min_id = self.tp_rank * block_size
-        self.max_id = (self.tp_rank + 1) * block_size
-
-        # Additional entry that will map to zero
-        # Used for masking
-        self.null_idx = block_size
-
-        super().__init__(
-            block_size,
-            embedding_dim,
-            padding_idx=padding_idx,
-            max_norm=max_norm,
-            norm_type=norm_type,
-            scale_grad_by_freq=scale_grad_by_freq,
-            sparse=sparse,
-            _weight=_weight,
-            device=device,
-            dtype=dtype,
-        )
-
-    def add_null_idx(self):
-        """Additional 0 entry used for masking"""
-        self.weight = nn.Parameter(F.pad(self.weight, (0, 0, 0, 1)))
-
-    def forward(self, input: torch.Tensor) -> torch.Tensor:
-        # default all out of bounds values to `self.null_idx` that will then be mapped to 0
-        # translate for [0, self.max_id - self.min_id[
-        input = torch.where(
-            (self.min_id > input) | (input >= self.max_id),
-            self.null_idx,
-            input - self.min_id,
-        )
-        out = super().forward(input)
-        if self.reduce:
-            torch.distributed.all_reduce(out, group=self.process_group)
-        return out
 
 
 class FlashMQAttention(torch.nn.Module):
@@ -468,22 +259,23 @@ class FlashSantacoderModel(nn.Module):
         self.head_size = self.h[0].attn.head_size
         self.num_heads = self.h[0].attn.num_heads
 
-    def post_load_weights(self, load_in_8bit: bool = False):
+    def post_load_weights(self, quantize: Optional[str] = None):
         if self.tp_embeddings:
             self.wte.add_null_idx()
             self.wpe.add_null_idx()
         for layer in self.h:
             layer: Block
-            layer.attn.c_attn.prepare_weights(load_in_8bit)
+            layer.attn.c_attn.prepare_weights(quantize)
-            layer.attn.c_proj.prepare_weights(load_in_8bit)
+            layer.attn.c_proj.prepare_weights(quantize)
-            layer.mlp.c_fc.prepare_weights(load_in_8bit)
+            layer.mlp.c_fc.prepare_weights(quantize)
-            layer.mlp.c_proj.prepare_weights(load_in_8bit)
+            layer.mlp.c_proj.prepare_weights(quantize)
 
     def forward(
         self,
         input_ids,
         position_ids,
         cu_seqlens,
+        cu_seqlens_q,
         max_s,
         past_key_values: Optional[torch.Tensor] = None,
         pre_allocate_past_size: Optional[int] = None,
@@ -507,15 +299,11 @@ class FlashSantacoderModel(nn.Module):
                 )
             )
             layer_past_present_indices = None
-            cu_seqlens_q = None
             slice_past_index = len(hidden_states)
         # Decode
         else:
             # Create indices from cumulative sequence lengths
             layer_past_present_indices = cu_seqlens[1:] - 1
-            cu_seqlens_q = torch.arange(
-                cu_seqlens.shape[0], dtype=torch.int32, device=hidden_states.device
-            )
             slice_past_index = None
 
         residual = None
@@ -557,8 +345,8 @@ class FlashSantacoderForCausalLM(nn.Module):
         else:
             self.lm_head = FastLinear(config.hidden_size, config.vocab_size, bias=False)
 
-    def post_load_weights(self, load_in_8bit: bool = False):
+    def post_load_weights(self, quantize: Optional[str] = None):
-        self.transformer.post_load_weights(load_in_8bit)
+        self.transformer.post_load_weights(quantize)
         self.lm_head.prepare_weights()
 
     def forward(
@@ -566,6 +354,7 @@ class FlashSantacoderForCausalLM(nn.Module):
         input_ids,
         position_ids,
         cu_seqlens,
+        cu_seqlens_q,
         max_s,
         past_key_values: Optional[torch.Tensor] = None,
         pre_allocate_past_size: Optional[int] = None,
@@ -574,6 +363,7 @@ class FlashSantacoderForCausalLM(nn.Module):
             input_ids,
             position_ids,
             cu_seqlens,
+            cu_seqlens_q,
             max_s,
             past_key_values,
             pre_allocate_past_size,
@@ -582,13 +372,25 @@ class FlashSantacoderForCausalLM(nn.Module):
 
         if self.transformer.tp_embeddings:
             # Logits are sharded, so we need to gather them
-            world_logits = [
+            if logits.shape[0] == 1:
-                torch.empty_like(logits) for _ in range(self.transformer.tp_world_size)
+                # Fast path when batch size is 1
-            ]
+                world_logits = logits.new_empty(
-            torch.distributed.all_gather(
+                    (logits.shape[1] * self.transformer.tp_world_size)
-                world_logits, logits, group=self.transformer.process_group
+                )
-            )
+                torch.distributed.all_gather_into_tensor(
-            world_logits = torch.cat(world_logits, dim=1)
+                    world_logits, logits.view(-1), group=self.transformer.process_group
+                )
+                world_logits = world_logits.view(1, -1)
+            else:
+                # We cannot use all_gather_into_tensor as it only support concatenating on the first dim
+                world_logits = [
+                    torch.empty_like(logits)
+                    for _ in range(self.transformer.tp_world_size)
+                ]
+                torch.distributed.all_gather(
+                    world_logits, logits, group=self.transformer.process_group
+                )
+                world_logits = torch.cat(world_logits, dim=1)
 
             return world_logits, present
 

server/text_generation_server/models/flash_causal_lm.py

@@ -1,6 +1,8 @@
 import torch
 import torch.distributed
 
+import numpy as np
+
 from torch.nn import functional as F
 
 from dataclasses import dataclass
@@ -33,12 +35,16 @@ class FlashCausalLMBatch(Batch):
     requests_idx_mapping: Dict[int, int]
 
     # Decoder values
-    input_ids: List[torch.Tensor]
+    input_ids: torch.Tensor
-    position_ids: List[torch.Tensor]
+    position_ids: torch.Tensor
+
     # cumulative sequence lengths
-    cu_seqlens: List[int]
+    cu_seqlens: torch.Tensor
+    # cumulative query sequence lengths, only used in decode
+    cu_seqlens_q: Optional[torch.Tensor]
+    # past key values, only used in decode
+    past_key_values: Optional[torch.Tensor]
     max_seqlen: int
-    past_key_values: Optional[Union[torch.Tensor, List[torch.Tensor]]]
 
     # All tokens
     all_input_ids: List[List[int]]
@@ -46,16 +52,13 @@ class FlashCausalLMBatch(Batch):
 
     # Lengths of all generations present in the batch
     input_lengths: List[int]
-    offsets: List[Optional[int]]
+    prefix_offsets: List[Optional[int]]
-    token_offsets: List[Optional[int]]
+    read_offsets: List[Optional[int]]
 
     # Generation helpers
     next_token_choosers: List[NextTokenChooser]
     stopping_criterias: List[StoppingCriteria]
 
-    # Constant shared tensor, ref here just so that it's accessible in concatentate()
-    past_pad: Optional[torch.Tensor]
-
     # Maximum number of tokens this batch will grow to
     max_tokens: int
 
@@ -74,16 +77,14 @@ class FlashCausalLMBatch(Batch):
         tokenizer: PreTrainedTokenizerBase,
         device: torch.device,
     ) -> "FlashCausalLMBatch":
-        input_ids = []
         position_ids = []
         cu_seqlens = [0]
         max_seqlen = 0
 
         input_lengths = []
-        offsets = []
+        prefix_offsets = []
-        token_offsets = []
+        read_offsets = []
         all_input_ids = []
-        all_input_ids_tensor = []
         requests_idx_mapping = {}
 
         next_token_choosers = []
@@ -107,17 +108,13 @@ class FlashCausalLMBatch(Batch):
             max_seqlen = max(max_seqlen, input_length)
             input_lengths.append(input_length)
 
-            offsets.append(None)
+            prefix_offsets.append(0)
-            token_offsets.append(None)
+            read_offsets.append(input_length)
+
             all_input_ids.append(tokenized_input)
 
-            tokenized_input = torch.tensor(tokenized_input, device=device)
-            input_ids.append(tokenized_input)
-
             # Position ids
-            position_ids.append(
+            position_ids.append(np.arange(0, input_length))
-                torch.arange(0, input_length, dtype=torch.int32, device=device)
-            )
 
             # Add cumulative lengths of all previous inputs
             cu_seqlens.append(cumulative_length + input_length)
@@ -130,14 +127,19 @@ class FlashCausalLMBatch(Batch):
             max_new_tokens = stopping_criteria.max_new_tokens
             stopping_criterias.append(stopping_criteria)
 
-            all_input_ids_tensor.append(
-                F.pad(tokenized_input, (0, stopping_criteria.max_new_tokens))
-            )
-
             # Update
             cumulative_length += input_length
             max_tokens += input_length + max_new_tokens
 
+        # Create tensors on device
+        input_ids = torch.tensor(
+            np.concatenate(all_input_ids), dtype=torch.int64, device=device
+        )
+        position_ids = torch.tensor(
+            np.concatenate(position_ids), dtype=torch.int32, device=device
+        )
+        cu_seqlens = torch.tensor(cu_seqlens, device=device, dtype=torch.int32)
+
         return cls(
             batch_id=pb.id,
             requests=pb.requests,
@@ -145,16 +147,16 @@ class FlashCausalLMBatch(Batch):
             input_ids=input_ids,
             position_ids=position_ids,
             cu_seqlens=cu_seqlens,
+            cu_seqlens_q=None,
             max_seqlen=max_seqlen,
             past_key_values=None,
             input_lengths=input_lengths,
-            offsets=offsets,
+            prefix_offsets=prefix_offsets,
-            token_offsets=token_offsets,
+            read_offsets=read_offsets,
             all_input_ids=all_input_ids,
-            all_input_ids_tensor=all_input_ids_tensor,
+            all_input_ids_tensor=[],
             next_token_choosers=next_token_choosers,
             stopping_criterias=stopping_criterias,
-            past_pad=None,
             max_tokens=max_tokens,
         )
 
@@ -174,9 +176,13 @@ class FlashCausalLMBatch(Batch):
         # New values after filtering
         requests_idx_mapping = {}
 
-        input_ids = []
+        input_ids = self.input_ids.new_empty(len(requests))
-        position_ids = []
+        position_ids = self.position_ids.new_empty(len(requests))
-        cu_seqlens = [0]
+        # Create on CPU to only move to GPU once instead of at every copy
+        cu_seqlens = torch.zeros(len(requests) + 1, dtype=torch.int32)
+        cu_seqlens_q = torch.arange(
+            0, len(requests) + 1, device=self.cu_seqlens_q.device, dtype=torch.int32
+        )
         max_seqlen = 0
         past_key_values = []
 
@@ -184,8 +190,8 @@ class FlashCausalLMBatch(Batch):
         all_input_ids_tensor = []
 
         input_lengths = []
-        offsets = []
+        prefix_offsets = []
-        token_offsets = []
+        read_offsets = []
 
         next_token_choosers = []
         stopping_criterias = []
@@ -199,23 +205,25 @@ class FlashCausalLMBatch(Batch):
             # Get length
             request_input_length = self.input_lengths[idx]
 
-            input_ids.append(self.input_ids[idx])
+            # Copy tensors (GPU)
-            position_ids.append(self.position_ids[idx])
+            input_ids[i] = self.input_ids[idx]
-            cu_seqlens.append(cumulative_length + request_input_length)
+            position_ids[i] = self.position_ids[idx]
-            max_seqlen = max(max_seqlen, request_input_length)
-            # True index for past
-            past_key_values.append(self.past_key_values[2 * idx])
 
-            if not single_request:
+            # Copy to tensor (CPU)
-                # Add one padding
+            cu_seqlens[i + 1] = cumulative_length + request_input_length
-                past_key_values.append(self.past_pad)
+            max_seqlen = max(max_seqlen, request_input_length)
+
+            # Slice from past
+            past_key_values.append(
+                self.past_key_values[:, self.cu_seqlens[idx] : self.cu_seqlens[idx + 1]]
+            )
 
             all_input_ids.append(self.all_input_ids[idx])
             all_input_ids_tensor.append(self.all_input_ids_tensor[idx])
 
             input_lengths.append(request_input_length)
-            offsets.append(self.offsets[idx])
+            prefix_offsets.append(self.prefix_offsets[idx])
-            token_offsets.append(self.token_offsets[idx])
+            read_offsets.append(self.read_offsets[idx])
 
             next_token_choosers.append(self.next_token_choosers[idx])
 
@@ -229,7 +237,7 @@ class FlashCausalLMBatch(Batch):
 
         if single_request:
             # Preallocate tensor for bs = 1 case
-            past_key_values = torch.nn.functional.pad(
+            past_key_values = F.pad(
                 past_key_values[0],
                 (
                     0,
@@ -243,20 +251,26 @@ class FlashCausalLMBatch(Batch):
                     - stopping_criterias[0].current_tokens,
                 ),
             )
+        else:
+            # Cat all past
+            past_key_values = torch.cat(past_key_values, dim=1)
+
+        # Move to GPU now that we have the whole tensor
+        cu_seqlens = cu_seqlens.to(self.cu_seqlens.device)
 
         return FlashCausalLMBatch(
             batch_id=self.batch_id,
-            past_pad=self.past_pad,
             requests=requests,
             requests_idx_mapping=requests_idx_mapping,
             input_ids=input_ids,
             position_ids=position_ids,
             cu_seqlens=cu_seqlens,
+            cu_seqlens_q=cu_seqlens_q,
             max_seqlen=max_seqlen,
             past_key_values=past_key_values,
             input_lengths=input_lengths,
-            offsets=offsets,
+            prefix_offsets=prefix_offsets,
-            token_offsets=token_offsets,
+            read_offsets=read_offsets,
             all_input_ids=all_input_ids,
             all_input_ids_tensor=all_input_ids_tensor,
             next_token_choosers=next_token_choosers,
@@ -271,9 +285,16 @@ class FlashCausalLMBatch(Batch):
         requests = []
         requests_idx_mapping = {}
 
-        input_ids = []
+        total_batch_size = sum([len(b) for b in batches])
-        position_ids = []
+
+        device = batches[0].input_ids.device
+
+        input_ids = batches[0].input_ids.new_empty(total_batch_size)
+        position_ids = batches[0].position_ids.new_empty(total_batch_size)
         cu_seqlens = [0]
+        cu_seqlens_q = torch.arange(
+            0, total_batch_size + 1, device=device, dtype=torch.int32
+        )
         max_seqlen = 0
         past_key_values = []
 
@@ -281,8 +302,8 @@ class FlashCausalLMBatch(Batch):
         all_input_ids_tensor = []
 
         input_lengths = []
-        offsets = []
+        prefix_offsets = []
-        token_offsets = []
+        read_offsets = []
 
         next_token_choosers = []
         stopping_criterias = []
@@ -302,29 +323,32 @@ class FlashCausalLMBatch(Batch):
                 for k, v in batch.requests_idx_mapping.items():
                     requests_idx_mapping[k] = v + cumulative_batch_size
 
-            input_ids.extend(batch.input_ids)
+            start_index = cumulative_batch_size
-            position_ids.extend(batch.position_ids)
+            end_index = cumulative_batch_size + len(batch)
+
+            # Copy tensors (GPU)
+            input_ids[start_index:end_index] = batch.input_ids
+            position_ids[start_index:end_index] = batch.position_ids
+
             # Add cumulative lengths of all previous inputs
             cu_seqlens.extend([l + cumulative_length for l in batch.cu_seqlens[1:]])
             max_seqlen = max(max_seqlen, batch.max_seqlen)
 
             if len(batch) != 1:
-                past_key_values.extend(batch.past_key_values)
+                past_key_values.append(batch.past_key_values)
             else:
                 # past was pre-allocated for this batch
                 # We need to slice to remove the padding
                 past_key_values.append(
                     batch.past_key_values[:, : batch.input_lengths[0]]
                 )
-                # Add one padding
-                past_key_values.append(batch.past_pad)
 
             all_input_ids.extend(batch.all_input_ids)
             all_input_ids_tensor.extend(batch.all_input_ids_tensor)
 
             input_lengths.extend(batch.input_lengths)
-            offsets.extend(batch.offsets)
+            prefix_offsets.extend(batch.prefix_offsets)
-            token_offsets.extend(batch.token_offsets)
+            read_offsets.extend(batch.read_offsets)
 
             next_token_choosers.extend(batch.next_token_choosers)
             stopping_criterias.extend(batch.stopping_criterias)
@@ -334,19 +358,24 @@ class FlashCausalLMBatch(Batch):
             cumulative_batch_size += len(batch)
             max_tokens += batch.max_tokens
 
+        # Cat past
+        past_key_values = torch.cat(past_key_values, dim=1)
+        # Create final tensor on GPU
+        cu_seqlens = torch.tensor(cu_seqlens, dtype=torch.int32, device=device)
+
         return FlashCausalLMBatch(
             batch_id=batches[0].batch_id,
-            past_pad=batches[0].past_pad,
             requests=requests,
             requests_idx_mapping=requests_idx_mapping,
             input_ids=input_ids,
             position_ids=position_ids,
             cu_seqlens=cu_seqlens,
+            cu_seqlens_q=cu_seqlens_q,
             max_seqlen=max_seqlen,
             past_key_values=past_key_values,
             input_lengths=input_lengths,
-            offsets=offsets,
+            prefix_offsets=prefix_offsets,
-            token_offsets=token_offsets,
+            read_offsets=read_offsets,
             all_input_ids=all_input_ids,
             all_input_ids_tensor=all_input_ids_tensor,
             next_token_choosers=next_token_choosers,
@@ -364,36 +393,30 @@ class FlashCausalLM(Model):
         model_cls: Type[PreTrainedModel],
         model_id: str,
         revision: Optional[str] = None,
-        quantize: bool = False,
+        quantize: Optional[str] = None,
-        decode_buffer: int = 3,
     ):
-        self.past_pad = None
         if torch.cuda.is_available():
             device = torch.device("cuda")
-            dtype = torch.bfloat16 if torch.cuda.is_bf16_supported() else torch.float16
+            dtype = torch.float16
         else:
             raise NotImplementedError("FlashCausalLM is only available on GPU")
 
         tokenizer = AutoTokenizer.from_pretrained(
             model_id, revision=revision, padding_side="left", truncation_side="left"
         )
-        self.model = (
+        model = model_cls.from_pretrained(
-            model_cls.from_pretrained(
+            model_id,
-                model_id,
+            revision=revision,
-                revision=revision,
+            torch_dtype=dtype,
-                torch_dtype=dtype,
+            load_in_8bit=quantize == "bitsandbytes",
-                load_in_8bit=quantize,
+        ).to(device)
-            )
-            .eval()
-            .to(device)
-        )
 
         super(FlashCausalLM, self).__init__(
+            model=model,
             tokenizer=tokenizer,
             requires_padding=False,
             dtype=dtype,
             device=device,
-            decode_buffer=decode_buffer,
         )
 
     @property
@@ -402,7 +425,7 @@ class FlashCausalLM(Model):
 
     def decode(self, generated_ids: Union[torch.Tensor, List[int]]) -> str:
         return self.tokenizer.decode(
-            generated_ids, skip_special_tokens=True, cleanup_tokenization_spaces=False
+            generated_ids, skip_special_tokens=True, clean_up_tokenization_spaces=False
         )
 
     def forward(
@@ -410,6 +433,7 @@ class FlashCausalLM(Model):
         input_ids: torch.Tensor,
         position_ids: torch.Tensor,
         cu_seqlens: torch.Tensor,
+        cu_seqlens_q: Optional[torch.Tensor],
         max_s: int,
         past_key_values: Optional = None,
         pre_allocate_past_size: Optional[int] = None,
@@ -419,6 +443,7 @@ class FlashCausalLM(Model):
             input_ids=input_ids,
             position_ids=position_ids,
             cu_seqlens=cu_seqlens,
+            cu_seqlens_q=cu_seqlens_q,
             max_s=max_s,
             past_key_values=past_key_values,
             pre_allocate_past_size=pre_allocate_past_size,
@@ -428,22 +453,9 @@ class FlashCausalLM(Model):
     def generate_token(
         self, batch: FlashCausalLMBatch
     ) -> Tuple[List[Generation], Optional[FlashCausalLMBatch]]:
-        # Shortcut when batch_size == 1
+        prefill = batch.past_key_values is None
-        if len(batch) == 1:
-            input_ids = batch.input_ids[0].view(-1)
-            # No need to slice as flash attention will take care of it with cu_seqlens
-            past_key_values = batch.past_key_values
-        else:
-            # Concatenate tensors
-            input_ids = torch.cat(batch.input_ids).view(-1)
-            past_key_values = (
-                torch.cat(batch.past_key_values, dim=1)
-                if batch.past_key_values is not None
-                else None
-            )
 
-        # if prefill and bs == 1
+        if prefill and len(batch) == 1:
-        if past_key_values is None and len(batch) == 1:
             # Ask to pre-allocate kv to its max size
             # == number of tokens + max_new_tokens
             pre_allocate_past_size = (
@@ -452,42 +464,74 @@ class FlashCausalLM(Model):
         else:
             pre_allocate_past_size = None
 
-        # Concatenate when prefill, torch.tensor when decode
-        position_ids = (
-            torch.tensor(batch.position_ids, device=self.device)
-            if batch.past_key_values is not None
-            else torch.cat(batch.position_ids)
-        )
-        cu_seqlens = torch.tensor(
-            batch.cu_seqlens, device=self.device, dtype=torch.int32
-        )
-
         out, present = self.forward(
-            input_ids,
+            batch.input_ids,
-            position_ids,
+            batch.position_ids,
-            cu_seqlens,
+            batch.cu_seqlens,
+            batch.cu_seqlens_q,
             batch.max_seqlen,
-            past_key_values,
+            batch.past_key_values,
             pre_allocate_past_size,
         )
 
-        # Initialize past_key_values in prefill
+        if prefill:
-        if batch.past_key_values is None:
+            if len(batch) > 1:
-            # Initialize past padding tensor
+                # We create the prefill_tokens_indices tensor that will be used to gather prefill logprobs
-            if self.past_pad is None:
+                # When batch == 1, we will just use the batch.input_ids values directly
-                self.past_pad = present.new_zeros(
+                prefill_tokens_indices = batch.input_ids.new_zeros(len(batch.input_ids))
-                    present.shape[0], 1, *present.shape[2:]
+
+            # Create batch.cu_seqlens_q for decode
+            batch.cu_seqlens_q = torch.arange(
+                0, len(batch) + 1, device=self.device, dtype=torch.int32
+            )
+            next_input_ids = batch.input_ids.new_empty(len(batch))
+            next_position_ids = batch.position_ids.new_empty(len(batch))
+        else:
+            prefill_logprobs = None
+            next_input_ids = batch.input_ids
+            next_position_ids = batch.position_ids
+
+        next_token_logprobs = out.new_empty(len(batch))
+
+        # Prepare past for next decode
+        if len(batch) > 1:
+            # Used to slice next batch past
+            past_indices = torch.empty(
+                present.shape[1], dtype=torch.int64, device=self.device
+            )
+            batch.past_key_values = present.new_empty(
+                (
+                    present.shape[0],
+                    present.shape[1] + len(batch.requests),
+                    *present.shape[2:],
                 )
-            # Set in batch in case it needs to be used later in concatenate()
+            )
-            batch.past_pad = self.past_pad
+
-            if len(batch) == 1:
+            # It is actually faster to do a whole other for loop here as the copy from present to past is fairly slow
-                # present is already pre-padded
+            # and will run asynchronously while we do the next for loop
-                batch.past_key_values = present
+            cumulative_length = 0
-            else:
+            for i, input_length in enumerate(batch.input_lengths):
-                # Add padding after each sequence
+                # Indexing metadata
-                # This will have the correct shape after the final past_key_values concatenation before the model
+                start_index = cumulative_length
-                # forward
+                end_index = cumulative_length + input_length
-                batch.past_key_values = [None, self.past_pad] * len(batch)
+
+                # Indices to copy present at the correct place in past_key_values
+                torch.arange(
+                    start_index + i,
+                    end_index + i,
+                    dtype=torch.int64,
+                    device=self.device,
+                    out=past_indices[start_index:end_index],
+                )
+                cumulative_length += input_length
+
+            # Copy from present to past_key_values
+            batch.past_key_values[:, past_indices] = present
+
+        # Initialize past_key_values in prefill for len(batch) == 1
+        elif prefill:
+            # present is already pre-padded
+            batch.past_key_values = present
 
         # Cumulative length
         cumulative_length = 0
@@ -496,132 +540,210 @@ class FlashCausalLM(Model):
         generations: List[Generation] = []
         stopped = True
 
+        # Zipped iterator
+        iterator = zip(
+            batch.input_lengths,
+            batch.next_token_choosers,
+            batch.stopping_criterias,
+            batch.all_input_ids,
+        )
+
+        # We do two for loops as the first one can run completely asynchronously from the GPU while for the second
+        # one, we need to first do a GPU <-> CPU sync
+        # It is faster if we delay this sync for the maximum amount of time
+
+        # For each member of the batch
+        for i, (
+            input_length,
+            next_token_chooser,
+            stopping_criteria,
+            all_input_ids,
+        ) in enumerate(iterator):
+            # Indexing metadata
+            start_index = cumulative_length
+            end_index = cumulative_length + input_length
+
+            if prefill:
+                # Prefill mode
+                # out is of shape [cumulative_sequence_lengths, vocab_size]
+                # only take last token logit
+                logits = out[end_index - 1 : end_index]
+
+                # Create all_input_ids_tensor that will be used by token warpers (for example, RepetitionPenalty)
+                all_input_ids_tensor = batch.input_ids.new_empty(
+                    input_length + stopping_criteria.max_new_tokens
+                )
+                # Copy from batch.input_ids to all_input_ids_tensor
+                all_input_ids_tensor[:input_length] = batch.input_ids[
+                    start_index:end_index
+                ]
+                batch.all_input_ids_tensor.append(all_input_ids_tensor)
+
+                # Initialize position_ids
+                # In decode, we do not need this as we can just increment position ids
+                next_position_ids[i] = batch.position_ids[end_index - 1]
+
+                # Used to gather prefill logprobs
+                # Copy batch.input_ids to prefill_token_indices
+                if len(batch) > 1:
+                    prefill_tokens_indices[
+                        start_index : end_index - 1
+                    ] = batch.input_ids[start_index + 1 : end_index]
+                else:
+                    # Set prefill_tokens_indices to the correct slice
+                    prefill_tokens_indices = batch.input_ids[
+                        start_index + 1 : end_index
+                    ]
+            else:
+                # Decode mode
+                # out is of shape [batch_size, vocab_size]
+                logits = out[i].view(1, -1)
+
+            all_input_ids_tensor = batch.all_input_ids_tensor[i]
+
+            # Select next token
+            next_token_id, logprob = next_token_chooser(
+                all_input_ids_tensor[None, :input_length], logits
+            )
+
+            # Add to all_input_ids_tensor
+            next_token_id_squeezed = next_token_id.view(1)
+            all_input_ids_tensor[input_length] = next_token_id_squeezed
+
+            # Set values
+            next_input_ids[i] = next_token_id_squeezed
+            next_token_logprobs[i] = logprob[-1, next_token_id].view(1)
+
+            cumulative_length += input_length
+
+        # Set values in batch
+        batch.input_ids = next_input_ids
+        batch.position_ids = next_position_ids + 1
+        batch.cu_seqlens = batch.cu_seqlens + batch.cu_seqlens_q
+
+        if prefill:
+            # Get prefill logprobs
+            prefill_logprobs_tensor = torch.log_softmax(out, -1)
+            prefill_logprobs = torch.gather(
+                prefill_logprobs_tensor, 1, prefill_tokens_indices.view(-1, 1)
+            )
+            # GPU <-> CPU sync
+            prefill_logprobs = prefill_logprobs.view(-1).tolist()
+
+        # GPU <-> CPU sync
+        next_token_logprobs = next_token_logprobs.tolist()
+        next_token_ids = batch.input_ids.tolist()
+
+        cumulative_length = 0
+
         # Zipped iterator
         iterator = zip(
             batch.requests,
             batch.input_lengths,
-            batch.offsets,
+            batch.prefix_offsets,
-            batch.token_offsets,
+            batch.read_offsets,
             batch.next_token_choosers,
             batch.stopping_criterias,
             batch.all_input_ids,
             batch.all_input_ids_tensor,
+            next_token_ids,
+            next_token_logprobs,
         )
 
         # For each member of the batch
         for i, (
             request,
             input_length,
-            offset,
+            prefix_offset,
-            token_offset,
+            read_offset,
             next_token_chooser,
             stopping_criteria,
             all_input_ids,
             all_input_ids_tensor,
+            next_token_id,
+            next_token_logprob,
         ) in enumerate(iterator):
-            # Indexing metadata
             start_index = cumulative_length
             end_index = cumulative_length + input_length
 
-            prefill = stopping_criteria.current_tokens == 0
-            if prefill:
-                # Prefill mode
-                # out is of shape [cumulative_sequence_lengths, vocab_size]
-                logits = out[start_index:end_index]
-            else:
-                # Decode mode
-                # out is of shape [batch_size, vocab_size]
-                logits = out[i].unsqueeze(0)
-
-            # Select next token
-            next_token_id, logprobs = next_token_chooser(
-                all_input_ids_tensor[None, :input_length], logits
-            )
-            next_token_id_squeezed = next_token_id.squeeze()
-            next_token_id_item = next_token_id_squeezed.item()
-
             # Append next token to all tokens
-            all_input_ids.append(next_token_id_item)
+            all_input_ids.append(next_token_id)
-            all_input_ids_tensor[input_length] = next_token_id_item
 
             # Generated token
-            next_token_logprob = logprobs[-1, next_token_id_item]
+            next_token_text, prefix_offset, read_offset = self.decode_token(
-            next_token_text, offset, token_offset = self.decode_token(
                 all_input_ids,
-                offset,
+                prefix_offset,
-                token_offset,
+                read_offset,
             )
 
             # Evaluate stopping criteria
             stop, reason = stopping_criteria(
-                next_token_id_item,
+                next_token_id,
                 next_token_text,
             )
 
-            if stop:
+            if not stop:
-                # Decode generated tokens
-                output_text = self.decode(
-                    all_input_ids[-stopping_criteria.current_tokens :]
-                )
-                # Get seed
-                if isinstance(next_token_chooser.choice, Sampling):
-                    seed = next_token_chooser.choice.seed
-                else:
-                    seed = None
-
-                generated_text = GeneratedText(
-                    output_text, stopping_criteria.current_tokens, reason, seed
-                )
-            else:
                 stopped = False
-                generated_text = None
 
-            # Prefill
+            # Shard generations
-            if prefill:
+            # All generations will be appended in the rust sharded client
-                # Remove generated token to only have prefill and add nan for first prompt token
+            if i % self.world_size == self.rank:
-                prefill_logprobs = [float("nan")] + logprobs.gather(
+                if stop:
-                    1, all_input_ids_tensor[1:input_length].unsqueeze(1)
+                    # Decode generated tokens
-                ).squeeze(1)[:-1].tolist()
+                    output_text = self.decode(
-                prefill_token_ids = all_input_ids[:-1]
+                        all_input_ids[-stopping_criteria.current_tokens :]
-                prefill_texts = self.tokenizer.batch_decode(
+                    )
-                    prefill_token_ids,
+                    # Get seed
-                    clean_up_tokenization_spaces=False,
+                    if isinstance(next_token_chooser.choice, Sampling):
-                    skip_special_tokens=False,
+                        seed = next_token_chooser.choice.seed
+                    else:
+                        seed = None
+
+                    generated_text = GeneratedText(
+                        output_text, stopping_criteria.current_tokens, reason, seed
+                    )
+                else:
+                    generated_text = None
+
+                # Prefill
+                if prefill:
+                    # Remove generated token to only have prefill and add nan for first prompt token
+                    request_prefill_logprobs = [float("nan")] + prefill_logprobs[
+                        start_index : end_index - 1
+                    ]
+                    prefill_token_ids = all_input_ids[:-1]
+                    prefill_texts = self.tokenizer.batch_decode(
+                        prefill_token_ids,
+                        clean_up_tokenization_spaces=False,
+                        skip_special_tokens=False,
+                    )
+                    prefill_tokens = PrefillTokens(
+                        prefill_token_ids, request_prefill_logprobs, prefill_texts
+                    )
+                else:
+                    prefill_tokens = None
+
+                generation = Generation(
+                    request.id,
+                    prefill_tokens,
+                    next_token_id,
+                    next_token_logprob,
+                    next_token_text,
+                    next_token_id in self.all_special_ids,
+                    generated_text,
                 )
-                prefill_tokens = PrefillTokens(
-                    prefill_token_ids, prefill_logprobs, prefill_texts
-                )
-            else:
-                prefill_tokens = None
 
-            generation = Generation(
+                generations.append(generation)
-                request.id,
-                prefill_tokens,
-                next_token_id_item,
-                next_token_logprob,
-                next_token_text,
-                next_token_id_item in self.all_special_ids,
-                generated_text,
-            )
 
-            generations.append(generation)
-            cumulative_length += input_length
             new_input_length = input_length + 1
 
             # Update values
-            batch.input_ids[i] = next_token_id
-            batch.position_ids[i] = input_length
             batch.input_lengths[i] = new_input_length
-            batch.offsets[i] = offset
+            batch.prefix_offsets[i] = prefix_offset
-            batch.token_offsets[i] = token_offset
+            batch.read_offsets[i] = read_offset
             batch.all_input_ids[i] = all_input_ids
-            batch.all_input_ids_tensor[i] = all_input_ids_tensor
+            batch.max_seqlen = batch.max_seqlen + 1
-            batch.max_seqlen = max(batch.max_seqlen, new_input_length)
+            cumulative_length += input_length
-            if len(batch) != 1:
-                # Add each sequence before its padding
-                batch.past_key_values[i * 2] = present[:, start_index:end_index]
-            # Cumulative sum
-            batch.cu_seqlens[(i + 1)] = batch.cu_seqlens[i] + new_input_length
 
         # No need to return a batch if we know that all requests stopped
         return generations, batch if not stopped else None

server/text_generation_server/models/flash_llama.py

@@ -28,11 +28,15 @@ tracer = trace.get_tracer(__name__)
 
 
 class FlashLlama(FlashCausalLM):
-    def __init__(self, model_id: str, revision: Optional[str] = None, quantize=False):
+    def __init__(
-        self.past_pad = None
+        self,
+        model_id: str,
+        revision: Optional[str] = None,
+        quantize: Optional[str] = None,
+    ):
         if torch.cuda.is_available():
             device = torch.device("cuda")
-            dtype = torch.bfloat16 if torch.cuda.is_bf16_supported() else torch.float16
+            dtype = torch.float16
         else:
             raise NotImplementedError("FlashLlama is only available on GPU")
 
@@ -60,9 +64,9 @@ class FlashLlama(FlashCausalLM):
             model = FlashLlamaForCausalLM(config)
 
         self.load_weights(model, filenames, quantize, device, dtype)
-        self.model = model.eval().to(device)
 
         super(FlashCausalLM, self).__init__(
+            model=model.to(device),
             tokenizer=tokenizer,
             requires_padding=False,
             dtype=dtype,
@@ -73,14 +77,14 @@ class FlashLlama(FlashCausalLM):
     def load_weights(
         model,
         filenames: List[Path],
-        quantize: bool,
+        quantize: Optional[str],
         device: torch.device,
         dtype: torch.dtype,
     ):
         for filename in filenames:
             state_dict = torch.load(filename, map_location="cpu")
             for key, value in state_dict.items():
-                value = value.to(device if not quantize else "cpu").to(dtype)
+                value = value.to(device if quantize is None else "cpu").to(dtype)
 
                 layer_name = ".".join(key.split(".")[:4])
 
@@ -145,14 +149,15 @@ class FlashLlama(FlashCausalLM):
 
 class FlashLlamaSharded(FlashLlama):
     def __init__(
-        self, model_id: str, revision: Optional[str] = None, quantize: bool = False
+        self,
+        model_id: str,
+        revision: Optional[str] = None,
+        quantize: Optional[str] = None,
     ):
-        self.past_pad = None
+        self.process_group, rank, world_size = initialize_torch_distributed()
-        self.process_group, self.rank, self.world_size = initialize_torch_distributed()
-        self.master = self.rank == 0
         if torch.cuda.is_available():
-            device = torch.device(f"cuda:{self.rank}")
+            device = torch.device(f"cuda:{rank}")
-            dtype = torch.bfloat16 if torch.cuda.is_bf16_supported() else torch.float16
+            dtype = torch.float16
         else:
             raise NotImplementedError("FlashLlama is only available on GPU")
 
@@ -181,23 +186,25 @@ class FlashLlamaSharded(FlashLlama):
             quantize=quantize,
             device=device,
             dtype=dtype,
-            rank=self.rank,
+            rank=rank,
-            world_size=self.world_size,
+            world_size=world_size,
         )
-        self.model = model.eval().to(device)
         torch.distributed.barrier(group=self.process_group)
         super(FlashCausalLM, self).__init__(
+            model=model.to(device),
             tokenizer=tokenizer,
             requires_padding=False,
             dtype=dtype,
             device=device,
+            rank=rank,
+            world_size=world_size,
         )
 
     @staticmethod
     def load_weights(
         model,
         filenames: List[str],
-        quantize: bool,
+        quantize: Optional[str],
         device: torch.device,
         dtype: torch.dtype,
         rank: int,
@@ -205,7 +212,7 @@ class FlashLlamaSharded(FlashLlama):
     ):
         for file in filenames:
             with safe_open(
-                file, framework="pt", device=str(device) if not quantize else "cpu"
+                file, framework="pt", device=str(device) if quantize is None else "cpu"
             ) as f:
                 for name in f.keys():
                     slice_ = f.get_slice(name)
@@ -300,5 +307,6 @@ class FlashLlamaSharded(FlashLlama):
 
                     else:
                         module._buffers[param_name] = tensor
+
         torch.cuda.empty_cache()
         model.post_load_weights(quantize)

server/text_generation_server/models/flash_neox.py

@@ -23,7 +23,12 @@ tracer = trace.get_tracer(__name__)
 
 
 class FlashNeoX(FlashCausalLM):
-    def __init__(self, model_id: str, revision: Optional[str] = None, quantize=False):
+    def __init__(
+        self,
+        model_id: str,
+        revision: Optional[str] = None,
+        quantize: Optional[str] = None,
+    ):
         super(FlashNeoX, self).__init__(
             FlashGPTNeoXForCausalLM, model_id, revision, quantize
         )
@@ -31,14 +36,15 @@ class FlashNeoX(FlashCausalLM):
 
 class FlashNeoXSharded(FlashNeoX):
     def __init__(
-        self, model_id: str, revision: Optional[str] = None, quantize: bool = False
+        self,
+        model_id: str,
+        revision: Optional[str] = None,
+        quantize: Optional[str] = None,
     ):
-        self.past_pad = None
+        self.process_group, rank, world_size = initialize_torch_distributed()
-        self.process_group, self.rank, self.world_size = initialize_torch_distributed()
-        self.master = self.rank == 0
         if torch.cuda.is_available():
-            device = torch.device(f"cuda:{self.rank}")
+            device = torch.device(f"cuda:{rank}")
-            dtype = torch.bfloat16 if torch.cuda.is_bf16_supported() else torch.float16
+            dtype = torch.float16
         else:
             raise NotImplementedError("FlashNeoX is only available on GPU")
 
@@ -64,16 +70,18 @@ class FlashNeoXSharded(FlashNeoX):
             quantize=quantize,
             device=device,
             dtype=dtype,
-            rank=self.rank,
+            rank=rank,
-            world_size=self.world_size,
+            world_size=world_size,
         )
-        self.model = model.eval().to(device)
         torch.distributed.barrier(group=self.process_group)
         super(FlashCausalLM, self).__init__(
+            model=model.to(device),
             tokenizer=tokenizer,
             requires_padding=False,
             dtype=dtype,
             device=device,
+            rank=rank,
+            world_size=world_size,
         )
 
     @staticmethod
@@ -89,7 +97,7 @@ class FlashNeoXSharded(FlashNeoX):
         parameters = dict(model.named_parameters())
         for file in filenames:
             with safe_open(
-                file, framework="pt", device=str(device) if not quantize else "cpu"
+                file, framework="pt", device=str(device) if quantize is None else "cpu"
             ) as f:
                 for name in f.keys():
                     module_name, param_name = name.rsplit(".", 1)
@@ -149,4 +157,5 @@ class FlashNeoXSharded(FlashNeoX):
                         module._parameters[param_name] = tensor
                     else:
                         module._buffers[param_name] = tensor
+
         model.post_load_weights(quantize)

server/text_generation_server/models/flash_santacoder.py

@@ -27,11 +27,15 @@ tracer = trace.get_tracer(__name__)
 
 
 class FlashSantacoder(FlashCausalLM):
-    def __init__(self, model_id: str, revision: Optional[str] = None, quantize=False):
+    def __init__(
-        self.past_pad = None
+        self,
+        model_id: str,
+        revision: Optional[str] = None,
+        quantize: Optional[str] = None,
+    ):
         if torch.cuda.is_available():
             device = torch.device("cuda")
-            dtype = torch.bfloat16 if torch.cuda.is_bf16_supported() else torch.float16
+            dtype = torch.float16
         else:
             raise NotImplementedError("FlashSantacoder is only available on GPU")
 
@@ -63,14 +67,13 @@ class FlashSantacoder(FlashCausalLM):
             dtype,
             config.architectures[0].startswith("GPT2"),
         )
-        self.model = model.eval().to(device)
 
         super(FlashCausalLM, self).__init__(
+            model=model.to(device),
             tokenizer=tokenizer,
             requires_padding=False,
             dtype=dtype,
             device=device,
-            decode_buffer=1,
         )
 
     @staticmethod
@@ -85,7 +88,7 @@ class FlashSantacoder(FlashCausalLM):
         for filename in filenames:
             state_dict = torch.load(filename, map_location="cpu")
             for key, value in state_dict.items():
-                value = value.to(device if not quantize else "cpu").to(dtype)
+                value = value.to(device if quantize is None else "cpu").to(dtype)
 
                 layer_name = ".".join(key.split(".")[:4])
 
@@ -165,20 +168,21 @@ class FlashSantacoder(FlashCausalLM):
     def decode(self, generated_ids: List[int]) -> str:
         # Do not skip special tokens as they are used for custom parsing rules of the generated text
         return self.tokenizer.decode(
-            generated_ids, skip_special_tokens=False, cleanup_tokenization_spaces=False
+            generated_ids, skip_special_tokens=False, clean_up_tokenization_spaces=False
         )
 
 
 class FlashSantacoderSharded(FlashSantacoder):
     def __init__(
-        self, model_id: str, revision: Optional[str] = None, quantize: bool = False
+        self,
+        model_id: str,
+        revision: Optional[str] = None,
+        quantize: Optional[str] = None,
     ):
-        self.past_pad = None
+        self.process_group, rank, world_size = initialize_torch_distributed()
-        self.process_group, self.rank, self.world_size = initialize_torch_distributed()
-        self.master = self.rank == 0
         if torch.cuda.is_available():
-            device = torch.device(f"cuda:{self.rank}")
+            device = torch.device(f"cuda:{rank}")
-            dtype = torch.bfloat16 if torch.cuda.is_bf16_supported() else torch.float16
+            dtype = torch.float16
         else:
             raise NotImplementedError("FlashSantacoderSharded is only available on GPU")
 
@@ -204,24 +208,26 @@ class FlashSantacoderSharded(FlashSantacoder):
             quantize=quantize,
             device=device,
             dtype=dtype,
-            rank=self.rank,
+            rank=rank,
-            world_size=self.world_size,
+            world_size=world_size,
             transpose=config.architectures[0].startswith("GPT2"),
         )
-        self.model = model.eval().to(device)
         torch.distributed.barrier(group=self.process_group)
         super(FlashCausalLM, self).__init__(
+            model=model.to(device),
             tokenizer=tokenizer,
             requires_padding=False,
             dtype=dtype,
             device=device,
+            rank=rank,
+            world_size=world_size,
         )
 
     @staticmethod
     def load_weights(
         model,
         filenames: List[str],
-        quantize: bool,
+        quantize: Optional[str],
         device: torch.device,
         dtype: torch.dtype,
         rank: int,
@@ -230,7 +236,7 @@ class FlashSantacoderSharded(FlashSantacoder):
     ):
         for file in filenames:
             with safe_open(
-                file, framework="pt", device=str(device) if not quantize else "cpu"
+                file, framework="pt", device=str(device) if quantize is None else "cpu"
             ) as f:
                 for key in f.keys():
                     slice_ = f.get_slice(key)
@@ -372,5 +378,7 @@ class FlashSantacoderSharded(FlashSantacoder):
                             module._parameters[param_name] = tensor
                     else:
                         module._buffers[param_name] = tensor
+
+        model.lm_head.weight = torch.nn.Parameter(model.transformer.wte.weight)
         torch.cuda.empty_cache()
         model.post_load_weights(quantize)

server/text_generation_server/models/galactica.py

@@ -94,8 +94,8 @@ class GalacticaCausalLMBatch(CausalLMBatch):
         inputs = []
         next_token_choosers = []
         stopping_criterias = []
-        offsets = []
+        prefix_offsets = []
-        token_offsets = []
+        read_offsets = []
         requests_idx_mapping = {}
 
         # Parse batch
@@ -106,8 +106,6 @@ class GalacticaCausalLMBatch(CausalLMBatch):
             requests_idx_mapping[r.id] = i
             # Add escape_custom_split_sequence to the CausalLMBatch logic
             inputs.append(escape_custom_split_sequence(r.inputs))
-            offsets.append(None)
-            token_offsets.append(None)
             next_token_choosers.append(NextTokenChooser.from_pb(r.parameters, device))
             stopping_criteria = StoppingCriteria.from_pb(
                 r.stopping_parameters, tokenizer
@@ -127,6 +125,10 @@ class GalacticaCausalLMBatch(CausalLMBatch):
             truncation=True,
             max_length=max_truncation,
         ).to(device)
+        for _ in pb.requests:
+            input_len = tokenized_inputs["input_ids"].shape[1]
+            prefix_offsets.append(0)
+            read_offsets.append(input_len)
 
         input_lengths = tokenized_inputs["attention_mask"].sum(1)
         max_input_length = input_lengths.max()
@@ -155,8 +157,8 @@ class GalacticaCausalLMBatch(CausalLMBatch):
             past_key_values=None,
             all_input_ids=list(all_input_ids),
             input_lengths=input_lengths.tolist(),
-            offsets=offsets,
+            prefix_offsets=prefix_offsets,
-            token_offsets=token_offsets,
+            read_offsets=read_offsets,
             next_token_choosers=next_token_choosers,
             stopping_criterias=stopping_criterias,
             max_input_length=max_input_length.item(),
@@ -173,7 +175,7 @@ class Galactica(OPT):
     def decode(self, generated_ids: List[int]) -> str:
         # Do not skip special tokens as they are used for custom parsing rules of the generated text
         return self.tokenizer.decode(
-            generated_ids, skip_special_tokens=False, cleanup_tokenization_spaces=False
+            generated_ids, skip_special_tokens=False, clean_up_tokenization_spaces=False
         )
 
     def forward(
@@ -193,13 +195,15 @@ class Galactica(OPT):
 
 class GalacticaSharded(Galactica):
     def __init__(
-        self, model_id: str, revision: Optional[str] = None, quantize: bool = False
+        self,
+        model_id: str,
+        revision: Optional[str] = None,
+        quantize: Optional[str] = None,
     ):
-        self.process_group, self.rank, self.world_size = initialize_torch_distributed()
+        self.process_group, rank, world_size = initialize_torch_distributed()
-        self.master = self.rank == 0
         if torch.cuda.is_available():
-            device = torch.device(f"cuda:{self.rank}")
+            device = torch.device(f"cuda:{rank}")
-            dtype = torch.bfloat16 if torch.cuda.is_bf16_supported() else torch.float32
+            dtype = torch.float16
         else:
             device = torch.device("cpu")
             dtype = torch.float32
@@ -226,23 +230,25 @@ class GalacticaSharded(Galactica):
             quantize=quantize,
             device=device,
             dtype=dtype,
-            rank=self.rank,
+            rank=rank,
-            world_size=self.world_size,
+            world_size=world_size,
         )
-        self.model = model.eval()
         torch.distributed.barrier(group=self.process_group)
         super(CausalLM, self).__init__(
+            model=model,
             tokenizer=tokenizer,
             requires_padding=True,
             dtype=dtype,
             device=device,
+            rank=rank,
+            world_size=world_size,
         )
 
     @staticmethod
     def load_weights(
         model,
         filenames: List[str],
-        quantize: bool,
+        quantize: Optional[str],
         device: torch.device,
         dtype: torch.dtype,
         rank: int,
@@ -251,7 +257,7 @@ class GalacticaSharded(Galactica):
         parameters = dict(model.named_parameters())
         for file in filenames:
             with safe_open(
-                file, framework="pt", device=str(device) if not quantize else "cpu"
+                file, framework="pt", device=str(device) if quantize is None else "cpu"
             ) as f:
                 for name in f.keys():
                     if name == "lm_head.weight":
@@ -297,7 +303,7 @@ class GalacticaSharded(Galactica):
 
                     tensor = tensor.contiguous().to(dtype)
 
-                    if quantize:
+                    if quantize == "bitsandbytes":
                         if not HAS_BITS_AND_BYTES:
                             raise ImportError(
                                 "bitsandbytes is not available on your machine either because it is not installed "
@@ -347,9 +353,14 @@ class GalacticaSharded(Galactica):
                                 return linear
 
                             module.linear = replace_linear(state)
-
+                        elif quantize == "gptq":
-                        else:
+                            raise NotImplementedError(
+                                "`gptq` is not implemented for now"
+                            )
+                        elif quantize is None:
                             tensor = tensor.to(device)
+                        else:
+                            raise ValueError(f"Unexpected quantize `{quantize}`")
 
                     module._parameters[param_name] = tensor
                     if name == "model.decoder.embed_tokens.weight":

server/text_generation_server/models/gpt_neox.py

@@ -32,13 +32,15 @@ except Exception as e:
 
 class GPTNeoxSharded(CausalLM):
     def __init__(
-        self, model_id: str, revision: Optional[str] = None, quantize: bool = False
+        self,
+        model_id: str,
+        revision: Optional[str] = None,
+        quantize: Optional[str] = None,
     ):
-        self.process_group, self.rank, self.world_size = initialize_torch_distributed()
+        self.process_group, rank, world_size = initialize_torch_distributed()
-        self.master = self.rank == 0
         if torch.cuda.is_available():
-            device = torch.device(f"cuda:{self.rank}")
+            device = torch.device(f"cuda:{rank}")
-            dtype = torch.bfloat16 if torch.cuda.is_bf16_supported() else torch.float32
+            dtype = torch.float16
         else:
             device = torch.device("cpu")
             dtype = torch.float32
@@ -65,23 +67,25 @@ class GPTNeoxSharded(CausalLM):
             quantize=quantize,
             device=device,
             dtype=dtype,
-            rank=self.rank,
+            rank=rank,
-            world_size=self.world_size,
+            world_size=world_size,
         )
-        self.model = model.eval()
         torch.distributed.barrier(group=self.process_group)
         super(CausalLM, self).__init__(
+            model=model,
             tokenizer=tokenizer,
             requires_padding=True,
             dtype=dtype,
             device=device,
+            rank=rank,
+            world_size=world_size,
         )
 
     @staticmethod
     def load_weights(
         model,
         filenames: List[str],
-        quantize: bool,
+        quantize: Optional[str],
         device: torch.device,
         dtype: torch.dtype,
         rank: int,
@@ -90,7 +94,7 @@ class GPTNeoxSharded(CausalLM):
         parameters = dict(model.named_parameters())
         for file in filenames:
             with safe_open(
-                file, framework="pt", device=str(device) if not quantize else "cpu"
+                file, framework="pt", device=str(device) if quantize is None else "cpu"
             ) as f:
                 for name in f.keys():
                     module_name, param_name = name.rsplit(".", 1)
@@ -146,7 +150,7 @@ class GPTNeoxSharded(CausalLM):
 
                     tensor = tensor.contiguous().to(dtype)
 
-                    if quantize:
+                    if quantize == "bitsandbytes":
                         if not HAS_BITS_AND_BYTES:
                             raise ImportError(
                                 "bitsandbytes is not available on your machine either because it is not installed "
@@ -196,9 +200,14 @@ class GPTNeoxSharded(CausalLM):
                                 return linear
 
                             module.linear = replace_linear(state)
-
+                        elif quantize == "gptq":
-                        else:
+                            raise NotImplementedError(
+                                "`gptq` is not implemented for now"
+                            )
+                        elif quantize is None:
                             tensor = tensor.to(device)
+                        else:
+                            raise ValueError(f"Unexpected quantize `{quantize}`")
 
                     if current_parameter_tensor is not None:
                         module._parameters[param_name] = tensor

server/text_generation_server/models/model.py

@@ -13,21 +13,23 @@ B = TypeVar("B", bound=Batch)
 class Model(ABC):
     def __init__(
         self,
+        model: torch.nn.Module,
         tokenizer: PreTrainedTokenizerBase,
         requires_padding: bool,
         dtype: torch.dtype,
         device: torch.device,
-        decode_buffer: int = 3,
+        rank: int = 0,
+        world_size: int = 1,
     ):
-        if decode_buffer < 1:
+        self.model = model.eval()
-            raise ValueError("decode_buffer must be >= 1")
-
         self.tokenizer = tokenizer
         self.all_special_ids = set(tokenizer.all_special_ids)
         self.requires_padding = requires_padding
         self.dtype = dtype
         self.device = device
-        self.decode_buffer = decode_buffer
+        self.rank = rank
+        self.world_size = world_size
+        self.check_initialized()
 
     @property
     def info(self) -> InfoResponse:
@@ -49,49 +51,36 @@ class Model(ABC):
     def decode_token(
         self,
         all_input_ids: List[int],
-        offset: Optional[int] = None,
+        prefix_offset: int = 0,
-        token_offset: Optional[int] = None,
+        read_offset: int = 0,
-    ) -> Tuple[str, Optional[int], Optional[int]]:
+    ) -> Tuple[str, int, int]:
         """Hack to hopefully support generate_stream for the maximum number of tokenizers"""
-        if all_input_ids[-1] in self.all_special_ids:
-            return (
-                self.tokenizer.decode(all_input_ids[-1], skip_special_tokens=False),
-                None,
-                None,
-            )
 
-        if token_offset is None:
+        # The prefix text is necessary only to defeat cleanup algorithms in the decode
-            token_offset = len(all_input_ids) - self.decode_buffer
+        # which decide to add a space or not depending on the surrounding ids.
-            # left token buffer
+        prefix_text = self.tokenizer.decode(
-            if self.decode_buffer > 1:
+            all_input_ids[prefix_offset:read_offset], skip_special_tokens=False
-                # Decode token_offset token minus last one and token_offset tokens
+        )
-                raw_texts = self.tokenizer.batch_decode(
+        new_text = self.tokenizer.decode(
-                    [all_input_ids[token_offset:-1], all_input_ids[token_offset:]],
+            all_input_ids[prefix_offset:], skip_special_tokens=False
-                    skip_special_tokens=False,
+        )
-                )
 
-                # default offset is only the last token
+        if len(new_text) > len(prefix_text) and not new_text.endswith("<EFBFBD>"):
-                offset = len(raw_texts[0])
+            # utf-8 char at the end means it's a potential unfinished byte sequence
-                sequence_text = raw_texts[1]
+            # from byte fallback tokenization.
-            else:
+            # If it's in the middle, it's probably a real invalid id generated
-                # Only decode the last token without using a token buffer
+            # by the model
-                sequence_text = self.tokenizer.decode(
+            new_text = new_text[len(prefix_text) :]
-                    all_input_ids[-1], skip_special_tokens=False
+            return new_text, read_offset, len(all_input_ids)
-                )
-                # no offset in this case
-                offset = 0
         else:
-            assert offset is not None
+            return "", prefix_offset, read_offset
-            sequence_text = self.tokenizer.decode(
+
-                all_input_ids[token_offset:],
+    def check_initialized(self):
-                skip_special_tokens=False,
+        uninitialized_parameters = []
+        for n, p in self.model.named_parameters():
+            if p.data.device == torch.device("meta"):
+                uninitialized_parameters.append(n)
+        if uninitialized_parameters:
+            raise RuntimeError(
+                f"found uninitialized parameters in model {self.__class__.__name__}: {uninitialized_parameters}"
             )
-
-        # get text
-        token_text = sequence_text[offset:]
-
-        # if text is utf-8
-        if token_text and token_text[-1] != "<EFBFBD>":
-            return token_text, None, None
-        else:
-            return "", offset, token_offset

server/text_generation_server/models/opt.py

@@ -48,13 +48,15 @@ class OPT(CausalLM):
 
 class OPTSharded(OPT):
     def __init__(
-        self, model_id: str, revision: Optional[str] = None, quantize: bool = False
+        self,
+        model_id: str,
+        revision: Optional[str] = None,
+        quantize: Optional[str] = None,
     ):
-        self.process_group, self.rank, self.world_size = initialize_torch_distributed()
+        self.process_group, rank, world_size = initialize_torch_distributed()
-        self.master = self.rank == 0
         if torch.cuda.is_available():
-            device = torch.device(f"cuda:{self.rank}")
+            device = torch.device(f"cuda:{rank}")
-            dtype = torch.bfloat16 if torch.cuda.is_bf16_supported() else torch.float32
+            dtype = torch.float16
         else:
             device = torch.device("cpu")
             dtype = torch.float32
@@ -81,16 +83,18 @@ class OPTSharded(OPT):
             quantize=quantize,
             device=device,
             dtype=dtype,
-            rank=self.rank,
+            rank=rank,
-            world_size=self.world_size,
+            world_size=world_size,
         )
-        self.model = model.eval()
         torch.distributed.barrier(group=self.process_group)
         super(CausalLM, self).__init__(
+            model=model,
             tokenizer=tokenizer,
             requires_padding=True,
             dtype=dtype,
             device=device,
+            rank=rank,
+            world_size=world_size,
         )
 
     @staticmethod
@@ -106,7 +110,7 @@ class OPTSharded(OPT):
         parameters = dict(model.named_parameters())
         for file in filenames:
             with safe_open(
-                file, framework="pt", device=str(device) if not quantize else "cpu"
+                file, framework="pt", device=str(device) if quantize is None else "cpu"
             ) as f:
                 for name in f.keys():
                     if name == "lm_head.weight":

server/text_generation_server/models/santacoder.py

@@ -14,10 +14,15 @@ EOD = "<|endoftext|>"
 
 
 class SantaCoder(CausalLM):
-    def __init__(self, model_id: str, revision: Optional[str] = None, quantize=False):
+    def __init__(
+        self,
+        model_id: str,
+        revision: Optional[str] = None,
+        quantize: Optional[str] = None,
+    ):
         if torch.cuda.is_available():
             device = torch.device("cuda")
-            dtype = torch.bfloat16 if torch.cuda.is_bf16_supported() else torch.float32
+            dtype = torch.float16
         else:
             if quantize:
                 raise ValueError("quantization is not available on CPU")
@@ -41,28 +46,24 @@ class SantaCoder(CausalLM):
             }
         )
 
-        self.model = (
+        model = AutoModelForCausalLM.from_pretrained(
-            AutoModelForCausalLM.from_pretrained(
+            model_id,
-                model_id,
+            revision=revision,
-                revision=revision,
+            torch_dtype=dtype,
-                torch_dtype=dtype,
+            load_in_8bit=quantize == "bitsandbytes",
-                load_in_8bit=quantize,
+            trust_remote_code=True,  # required
-                trust_remote_code=True,  # required
+        ).to(device)
-            )
-            .to(device)
-            .eval()
-        )
 
         super(CausalLM, self).__init__(
+            model=model,
             tokenizer=tokenizer,
             requires_padding=True,
             dtype=dtype,
             device=device,
-            decode_buffer=1,
         )
 
     def decode(self, generated_ids: List[int]) -> str:
         # Do not skip special tokens as they are used for custom parsing rules of the generated text
         return self.tokenizer.decode(
-            generated_ids, skip_special_tokens=False, cleanup_tokenization_spaces=False
+            generated_ids, skip_special_tokens=False, clean_up_tokenization_spaces=False
         )

server/text_generation_server/models/seq2seq_lm.py

@@ -42,8 +42,8 @@ class Seq2SeqLMBatch(Batch):
     # Lengths of all generations present in the batch
     input_lengths: List[int]
     decoder_input_lengths: List[int]
-    offsets: List[Optional[int]]
+    prefix_offsets: List[int]
-    token_offsets: List[Optional[int]]
+    read_offsets: List[int]
 
     # Generation helpers
     next_token_choosers: List[NextTokenChooser]
@@ -79,8 +79,8 @@ class Seq2SeqLMBatch(Batch):
         stopping_criterias = []
 
         decoder_input_lengths = []
-        offsets = []
+        prefix_offsets = []
-        token_offsets = []
+        read_offsets = []
         requests_idx_mapping = {}
 
         # Parse batch
@@ -91,8 +91,6 @@ class Seq2SeqLMBatch(Batch):
             inputs.append(r.inputs)
             requests_idx_mapping[r.id] = i
             decoder_input_lengths.append(1)
-            offsets.append(None)
-            token_offsets.append(None)
             next_token_choosers.append(NextTokenChooser.from_pb(r.parameters, device))
             stopping_criteria = StoppingCriteria.from_pb(
                 r.stopping_parameters, tokenizer
@@ -123,6 +121,9 @@ class Seq2SeqLMBatch(Batch):
             .repeat(len(pb.requests))
             .view(-1, 1)
         )
+        for _ in pb.requests:
+            prefix_offsets.append(0)
+            read_offsets.append(1)
         all_decoder_input_ids = decoder_input_ids.view(-1).split(1)
 
         max_tokens = len(inputs) * max_input_length + max_decode_tokens
@@ -140,8 +141,8 @@ class Seq2SeqLMBatch(Batch):
             past_key_values=None,
             input_lengths=input_lengths.tolist(),
             decoder_input_lengths=decoder_input_lengths,
-            offsets=offsets,
+            prefix_offsets=prefix_offsets,
-            token_offsets=token_offsets,
+            read_offsets=read_offsets,
             next_token_choosers=next_token_choosers,
             stopping_criterias=stopping_criterias,
             max_input_length=max_input_length.item(),
@@ -165,8 +166,8 @@ class Seq2SeqLMBatch(Batch):
         requests_idx_mapping = {}
         input_lengths = []
         decoder_input_lengths = []
-        offsets = []
+        prefix_offsets = []
-        token_offsets = []
+        read_offsets = []
 
         all_decoder_input_ids = []
 
@@ -184,8 +185,8 @@ class Seq2SeqLMBatch(Batch):
             requests_idx_mapping[r.id] = i
             keep_indices.append(idx)
 
-            offsets.append(self.offsets[idx])
+            prefix_offsets.append(self.prefix_offsets[idx])
-            token_offsets.append(self.token_offsets[idx])
+            read_offsets.append(self.read_offsets[idx])
 
             all_decoder_input_ids.append(self.all_decoder_input_ids[idx])
 
@@ -248,8 +249,8 @@ class Seq2SeqLMBatch(Batch):
         self.all_decoder_input_ids = all_decoder_input_ids
         self.input_lengths = input_lengths
         self.decoder_input_lengths = decoder_input_lengths
-        self.offsets = offsets
+        self.prefix_offsets = prefix_offsets
-        self.token_offsets = token_offsets
+        self.read_offsets = read_offsets
         self.next_token_choosers = next_token_choosers
         self.stopping_criterias = stopping_criterias
         self.max_input_length = max_input_length
@@ -283,8 +284,8 @@ class Seq2SeqLMBatch(Batch):
         all_decoder_input_ids = []
         input_lengths = []
         decoder_input_lengths = []
-        offsets = []
+        prefix_offsets = []
-        token_offsets = []
+        read_offsets = []
         next_token_choosers = []
         stopping_criterias = []
         max_tokens = 0
@@ -306,8 +307,8 @@ class Seq2SeqLMBatch(Batch):
             all_decoder_input_ids.extend(batch.all_decoder_input_ids)
             input_lengths.extend(batch.input_lengths)
             decoder_input_lengths.extend(batch.decoder_input_lengths)
-            offsets.extend(batch.offsets)
+            prefix_offsets.extend(batch.prefix_offsets)
-            token_offsets.extend(batch.token_offsets)
+            read_offsets.extend(batch.read_offsets)
             next_token_choosers.extend(batch.next_token_choosers)
             stopping_criterias.extend(batch.stopping_criterias)
 
@@ -482,8 +483,8 @@ class Seq2SeqLMBatch(Batch):
             past_key_values=past_key_values,
             input_lengths=input_lengths,
             decoder_input_lengths=decoder_input_lengths,
-            offsets=offsets,
+            prefix_offsets=prefix_offsets,
-            token_offsets=token_offsets,
+            read_offsets=read_offsets,
             next_token_choosers=next_token_choosers,
             stopping_criterias=stopping_criterias,
             max_input_length=max_input_length,
@@ -501,12 +502,11 @@ class Seq2SeqLM(Model):
         self,
         model_id: str,
         revision: Optional[str] = None,
-        quantize: bool = False,
+        quantize: Optional[str] = None,
-        decode_buffer: int = 3,
     ):
         if torch.cuda.is_available():
             device = torch.device("cuda")
-            dtype = torch.bfloat16 if torch.cuda.is_bf16_supported() else torch.float32
+            dtype = torch.float16
         else:
             if quantize:
                 raise ValueError("quantization is not available on CPU")
@@ -514,24 +514,24 @@ class Seq2SeqLM(Model):
             device = torch.device("cpu")
             dtype = torch.float32
 
-        self.model = AutoModelForSeq2SeqLM.from_pretrained(
+        model = AutoModelForSeq2SeqLM.from_pretrained(
             model_id,
             revision=revision,
             torch_dtype=dtype,
             device_map="auto" if torch.cuda.is_available() else None,
-            load_in_8bit=quantize,
+            load_in_8bit=quantize == "bitsandbytes",
-        ).eval()
+        )
         tokenizer = AutoTokenizer.from_pretrained(
             model_id, revision=revision, padding_side="left", truncation_side="left"
         )
-        tokenizer.bos_token_id = self.model.config.decoder_start_token_id
+        tokenizer.bos_token_id = model.config.decoder_start_token_id
 
         super(Seq2SeqLM, self).__init__(
+            model=model,
             tokenizer=tokenizer,
             requires_padding=True,
             dtype=dtype,
             device=device,
-            decode_buffer=decode_buffer,
         )
 
     @property
@@ -608,8 +608,8 @@ class Seq2SeqLM(Model):
         iterator = zip(
             batch.requests,
             batch.input_lengths,
-            batch.offsets,
+            batch.prefix_offsets,
-            batch.token_offsets,
+            batch.read_offsets,
             batch.decoder_input_lengths,
             logits,
             batch.next_token_choosers,
@@ -621,8 +621,8 @@ class Seq2SeqLM(Model):
         for i, (
             request,
             input_length,
-            offset,
+            prefix_offset,
-            token_offset,
+            read_offset,
             decoder_input_length,
             logits,
             next_token_chooser,
@@ -631,7 +631,7 @@ class Seq2SeqLM(Model):
         ) in enumerate(iterator):
             # Select next token
             next_token_id, logprobs = next_token_chooser(
-                all_decoder_input_ids.view(1, -1), logits
+                all_decoder_input_ids.view(1, -1), logits[-1:, :]
             )
 
             # Append next token to decoder tokens
@@ -643,61 +643,67 @@ class Seq2SeqLM(Model):
             # Generated token
             next_token_logprob = logprobs[-1, next_token_id]
             next_token_id_squeezed = next_token_id.squeeze()
-            next_token_text, offset, token_offset = self.decode_token(
+            next_token_text, prefix_offset, read_offset = self.decode_token(
-                all_decoder_input_ids, offset, token_offset
+                all_decoder_input_ids, prefix_offset, read_offset
             )
 
             # Evaluate stopping criteria
             stop, reason = stopping_criteria(next_token_id, next_token_text)
 
-            if stop:
+            if not stop:
-                # Slice with decoder_input_length to remove padding
-                # Decode all tokens
-                output_text = self.decode(all_decoder_input_ids[-decoder_input_length:])
-
-                # Get seed
-                if isinstance(next_token_chooser.choice, Sampling):
-                    seed = next_token_chooser.choice.seed
-                else:
-                    seed = None
-
-                generated_text = GeneratedText(
-                    output_text, stopping_criteria.current_tokens, reason, seed
-                )
-            else:
-                # Keep request in the batch
-                generated_text = None
                 stopped = False
 
-            # Prefill
+            # Shard generations
-            if stopping_criteria.current_tokens == 1:
+            # All generations will be appended in the rust sharded client
-                prefill_tokens = PrefillTokens(
+            if i % self.world_size == self.rank:
-                    [self.tokenizer.bos_token_id],
+                if stop:
-                    [float("nan")],
+                    # Slice with decoder_input_length to remove padding
-                    [self.tokenizer.bos_token],
+                    # Decode all tokens
+                    output_text = self.decode(
+                        all_decoder_input_ids[-decoder_input_length:]
+                    )
+
+                    # Get seed
+                    if isinstance(next_token_chooser.choice, Sampling):
+                        seed = next_token_chooser.choice.seed
+                    else:
+                        seed = None
+
+                    generated_text = GeneratedText(
+                        output_text, stopping_criteria.current_tokens, reason, seed
+                    )
+                else:
+                    generated_text = None
+
+                # Prefill
+                if stopping_criteria.current_tokens == 1:
+                    prefill_tokens = PrefillTokens(
+                        [self.tokenizer.bos_token_id],
+                        [float("nan")],
+                        [self.tokenizer.bos_token],
+                    )
+                else:
+                    prefill_tokens = None
+
+                generation = Generation(
+                    request.id,
+                    prefill_tokens,
+                    next_token_id_squeezed,
+                    next_token_logprob,
+                    next_token_text,
+                    next_token_id_squeezed.item() in self.all_special_ids,
+                    generated_text,
                 )
-            else:
-                prefill_tokens = None
 
-            generation = Generation(
+                generations.append(generation)
-                request.id,
-                prefill_tokens,
-                next_token_id_squeezed,
-                next_token_logprob,
-                next_token_text,
-                next_token_id_squeezed.item() in self.all_special_ids,
-                generated_text,
-            )
-
-            generations.append(generation)
 
             # Update values
             batch.decoder_input_ids[i] = next_token_id
             batch.all_decoder_input_ids[i] = all_decoder_input_ids
             batch.input_lengths[i] = input_length
             batch.decoder_input_lengths[i] = new_decoder_input_length
-            batch.offsets[i] = offset
+            batch.prefix_offsets[i] = prefix_offset
-            batch.token_offsets[i] = token_offset
+            batch.read_offsets[i] = read_offset
             batch.max_input_length = max(batch.max_input_length, input_length)
             batch.max_decoder_input_length = max(
                 batch.max_decoder_input_length, new_decoder_input_length

server/text_generation_server/models/t5.py

@@ -10,35 +10,37 @@ from transformers import (
     AutoModelForSeq2SeqLM,
     AutoConfig,
 )
-from transformers.models.t5.parallel_layers import (
-    TensorParallelColumnLinear,
-    TensorParallelEmbedding,
-    TensorParallelRowLinear,
-)
 
 from text_generation_server.models import Seq2SeqLM
 from text_generation_server.utils import (
     initialize_torch_distributed,
     weight_files,
 )
+from transformers.models.t5.parallel_layers import (
+    TensorParallelRowLinear,
+    TensorParallelColumnLinear,
+    TensorParallelEmbedding,
+)
 
 HAS_BITS_AND_BYTES = True
 try:
     import bitsandbytes as bnb
     from bitsandbytes.nn import Int8Params
-except Exception as e:
+except ImportError as e:
     HAS_BITS_AND_BYTES = False
 
 
 class T5Sharded(Seq2SeqLM):
     def __init__(
-        self, model_id: str, revision: Optional[str] = None, quantize: bool = False
+        self,
+        model_id: str,
+        revision: Optional[str] = None,
+        quantize: Optional[str] = None,
     ):
-        self.process_group, self.rank, self.world_size = initialize_torch_distributed()
+        self.process_group, rank, world_size = initialize_torch_distributed()
-        self.master = self.rank == 0
         if torch.cuda.is_available():
-            device = torch.device(f"cuda:{self.rank}")
+            device = torch.device(f"cuda:{rank}")
-            dtype = torch.bfloat16 if torch.cuda.is_bf16_supported() else torch.float32
+            dtype = torch.float16
         else:
             device = torch.device("cpu")
             dtype = torch.float32
@@ -65,23 +67,25 @@ class T5Sharded(Seq2SeqLM):
             quantize=quantize,
             device=device,
             dtype=dtype,
-            rank=self.rank,
+            rank=rank,
-            world_size=self.world_size,
+            world_size=world_size,
         )
-        self.model = model.eval()
         torch.distributed.barrier(group=self.process_group)
         super(Seq2SeqLM, self).__init__(
+            model=model,
             tokenizer=tokenizer,
             requires_padding=True,
             dtype=dtype,
             device=device,
+            rank=rank,
+            world_size=world_size,
         )
 
     @staticmethod
     def load_weights(
         model,
         filenames: List[str],
-        quantize: bool,
+        quantize: Optional[str],
         device: torch.device,
         dtype: torch.dtype,
         rank: int,
@@ -90,7 +94,7 @@ class T5Sharded(Seq2SeqLM):
         parameters = dict(model.named_parameters())
         for file in filenames:
             with safe_open(
-                file, framework="pt", device=str(device) if not quantize else "cpu"
+                file, framework="pt", device=str(device) if quantize is None else "cpu"
             ) as f:
                 for name in f.keys():
                     module_name, param_name = name.rsplit(".", 1)
@@ -152,7 +156,7 @@ class T5Sharded(Seq2SeqLM):
 
                     tensor = tensor.contiguous().to(dtype)
 
-                    if quantize:
+                    if quantize == "bitsandbytes":
                         if not HAS_BITS_AND_BYTES:
                             raise ImportError(
                                 "bitsandbytes is not available on your machine either because it is not installed "
@@ -203,8 +207,14 @@ class T5Sharded(Seq2SeqLM):
 
                             module.linear = replace_linear(state)
 
-                        else:
+                        elif quantize == "gptq":
+                            raise NotImplementedError(
+                                "`gptq` is not implemented for now"
+                            )
+                        elif quantize is None:
                             tensor = tensor.to(device)
+                        else:
+                            raise ValueError(f"Unexpected quantize `{quantize}`")
 
                     if current_parameter_tensor is not None:
                         module._parameters[param_name] = tensor

server/text_generation_server/server.py

@@ -100,14 +100,14 @@ def serve(
     model_id: str,
     revision: Optional[str],
     sharded: bool,
-    quantize: bool,
+    quantize: Optional[str],
     uds_path: Path,
 ):
     async def serve_inner(
         model_id: str,
         revision: Optional[str],
         sharded: bool = False,
-        quantize: bool = False,
+        quantize: Optional[str] = None,
     ):
         unix_socket_template = "unix://{}-{}"
         if sharded:

server/text_generation_server/utils/convert.py

@@ -1,5 +1,6 @@
 import concurrent
 import time
+import datetime
 import torch
 
 from concurrent.futures import ThreadPoolExecutor
@@ -8,6 +9,7 @@ from datetime import timedelta
 from loguru import logger
 from pathlib import Path
 from safetensors.torch import load_file, save_file
+from safetensors import safe_open
 from typing import Dict, List
 
 
@@ -45,11 +47,11 @@ def remove_shared_pointers(tensors: Dict[str, torch.Tensor]):
                 tensors.pop(name)
 
 
-def convert_file(pt_file: Path, st_file: Path):
+def convert_file(pt_file: Path, sf_file: Path):
     """
     Convert a pytorch file to a safetensors file
     """
-    logger.info(f"Convert {pt_file} to {st_file}.")
+    logger.info(f"Convert {pt_file} to {sf_file}.")
 
     pt_state = torch.load(pt_file, map_location="cpu")
     if "state_dict" in pt_state:
@@ -60,35 +62,29 @@ def convert_file(pt_file: Path, st_file: Path):
     # Tensors need to be contiguous
     pt_state = {k: v.contiguous() for k, v in pt_state.items()}
 
-    st_file.parent.mkdir(parents=True, exist_ok=True)
+    sf_file.parent.mkdir(parents=True, exist_ok=True)
-    save_file(pt_state, str(st_file), metadata={"format": "pt"})
+    save_file(pt_state, str(sf_file), metadata={"format": "pt"})
 
     # Check that both files are close in size
-    check_file_size(pt_file, st_file)
+    check_file_size(pt_file, sf_file)
 
     # Load safetensors state
-    st_state = load_file(str(st_file))
+    for k in pt_state:
-    for k in st_state:
         pt_tensor = pt_state[k]
-        st_tensor = st_state[k]
+        with safe_open(sf_file, framework="pt") as f:
-        if not torch.equal(pt_tensor, st_tensor):
+            sf_tensor = f.get_tensor(k)
-            raise RuntimeError(f"The output tensors do not match for key {k}")
+            if not torch.equal(pt_tensor, sf_tensor):
+                raise RuntimeError(f"The output tensors do not match for key {k}")
 
 
-def convert_files(pt_files: List[Path], st_files: List[Path]):
+def convert_files(pt_files: List[Path], sf_files: List[Path]):
-    assert len(pt_files) == len(st_files)
+    assert len(pt_files) == len(sf_files)
-
-    executor = ThreadPoolExecutor(max_workers=5)
-    futures = [
-        executor.submit(convert_file, pt_file=pt_file, st_file=st_file)
-        for pt_file, st_file in zip(pt_files, st_files)
-    ]
 
+    N = len(pt_files)
     # We do this instead of using tqdm because we want to parse the logs with the launcher
-    start_time = time.time()
-    for i, future in enumerate(concurrent.futures.as_completed(futures)):
-        elapsed = timedelta(seconds=int(time.time() - start_time))
-        remaining = len(futures) - (i + 1)
-        eta = (elapsed / (i + 1)) * remaining if remaining > 0 else 0
 
-        logger.info(f"Convert: [{i + 1}/{len(futures)}] -- ETA: {eta}")
+    for i, (pt_file, sf_file) in enumerate(zip(pt_files, sf_files)):
+        start = datetime.datetime.now()
+        convert_file(pt_file, sf_file)
+        elapsed = datetime.datetime.now() - start
+        logger.info(f"Convert: [{i + 1}/{N}] -- Took: {elapsed}")

server/text_generation_server/utils/hub.py

@@ -77,7 +77,12 @@ def weight_files(
     """Get the local files"""
     # Local model
     if Path(model_id).exists() and Path(model_id).is_dir():
-        return list(Path(model_id).glob(f"*{extension}"))
+        local_files = list(Path(model_id).glob(f"*{extension}"))
+        if not local_files:
+            raise FileNotFoundError(
+                f"No local weights found in {model_id} with extension {extension}"
+            )
+        return local_files
 
     try:
         filenames = weight_hub_files(model_id, revision, extension)
@@ -98,7 +103,7 @@ def weight_files(
         for filename in filenames:
             p = Path(WEIGHTS_CACHE_OVERRIDE) / filename
             if not p.exists():
-                raise LocalEntryNotFoundError(
+                raise FileNotFoundError(
                     f"File {p} not found in {WEIGHTS_CACHE_OVERRIDE}."
                 )
             files.append(p)

server/text_generation_server/utils/layers.py

@@ -0,0 +1,277 @@
+import torch
+
+from torch import nn
+from torch.nn import functional as F
+from typing import Optional
+
+HAS_BITS_AND_BYTES = True
+try:
+    from bitsandbytes.nn import Linear8bitLt
+except ImportError as e:
+    HAS_BITS_AND_BYTES = False
+
+
+class FastLinear(nn.Linear):
+    def __init__(
+        self,
+        in_features: int,
+        out_features: int,
+        bias: bool = True,
+        device=None,
+        dtype=None,
+    ) -> None:
+        super(FastLinear, self).__init__(in_features, out_features, bias, device, dtype)
+        self.quantized = False
+        self.bnb_linear = None
+
+    def prepare_weights(self, quantize: Optional[str] = None):
+        if quantize == "bitsandbytes":
+            if not HAS_BITS_AND_BYTES:
+                raise ImportError(
+                    "bitsandbytes is not available on your machine either because it is not installed "
+                    "or you don't have a GPU.\n"
+                    "You can install it with `pip install bitsandbytes`."
+                )
+
+            self.quantized = True
+            self.bnb_linear = Linear8bitLt(
+                self.in_features,
+                self.out_features,
+                has_fp16_weights=False,
+                threshold=6.0,
+                bias=False,
+            )
+            # Copy data to bnb_linear
+            self.bnb_linear.weight.data = self.weight.data
+            if self.bias is not None:
+                self.bnb_linear.bias = nn.Parameter(self.bias)
+
+            # Delete reference to data
+            self.weight = None
+            self.bias = None
+        elif quantize == "gptq":
+            raise NotImplementedError("`gptq` is not implemented for now")
+        elif quantize is None:
+            self.weight = nn.Parameter(self.weight.T)
+        else:
+            raise ValueError(f"Unexpected quantize `{quantize}`")
+
+    def forward(self, input: torch.Tensor) -> torch.Tensor:
+        if self.quantized:
+            return self.bnb_linear(input)
+        else:
+            if self.bias is not None:
+                return torch.addmm(self.bias, input, self.weight)
+            return torch.matmul(input, self.weight)
+
+
+class TensorParallelColumnLinear(FastLinear):
+    def __init__(
+        self,
+        in_features,
+        out_features,
+        process_group: torch.distributed.ProcessGroup,
+        bias=True,
+        device=None,
+        dtype=None,
+    ):
+        self.process_group = process_group
+        self.tp_world_size = process_group.size()
+        assert out_features % self.tp_world_size == 0
+        out_features = out_features // self.tp_world_size
+
+        super().__init__(
+            in_features=in_features,
+            out_features=out_features,
+            bias=bias,
+            device=device,
+            dtype=dtype,
+        )
+
+
+class TensorParallelRowLinear(FastLinear):
+    def __init__(
+        self,
+        in_features,
+        out_features,
+        process_group: torch.distributed.ProcessGroup,
+        reduce=True,
+        bias=True,
+        device=None,
+        dtype=None,
+    ):
+        self.process_group = process_group
+        self.tp_world_size = process_group.size()
+        self.reduce = reduce
+        assert in_features % self.tp_world_size == 0
+        in_features = in_features // self.tp_world_size
+
+        super().__init__(
+            in_features=in_features,
+            out_features=out_features,
+            bias=bias,
+            device=device,
+            dtype=dtype,
+        )
+
+    def forward(self, input: torch.Tensor) -> torch.Tensor:
+        out = super(TensorParallelRowLinear, self).forward(input)
+        if self.reduce:
+            torch.distributed.all_reduce(out, group=self.process_group)
+
+        return out
+
+
+class TensorParallelEmbedding(nn.Embedding):
+    def __init__(
+        self,
+        num_embeddings,
+        embedding_dim,
+        process_group: torch.distributed.ProcessGroup,
+        reduce=True,
+        padding_idx=None,
+        max_norm=None,
+        norm_type=2.0,
+        scale_grad_by_freq=False,
+        sparse=False,
+        _weight=None,
+        device=None,
+        dtype=None,
+    ):
+        self.reduce = reduce
+        self.process_group = process_group
+        self.tp_rank = process_group.rank()
+        self.tp_world_size = process_group.size()
+
+        self.original_num_embeddings = num_embeddings
+
+        assert num_embeddings % self.tp_world_size == 0
+        block_size = num_embeddings // self.tp_world_size
+        # inputs in `[min_id, max_id[` are handled by `self` to get embeddings
+        self.min_id = self.tp_rank * block_size
+        self.max_id = (self.tp_rank + 1) * block_size
+
+        # Additional entry that will map to zero
+        # Used for masking
+        self.null_idx = block_size
+
+        super().__init__(
+            block_size,
+            embedding_dim,
+            padding_idx=padding_idx,
+            max_norm=max_norm,
+            norm_type=norm_type,
+            scale_grad_by_freq=scale_grad_by_freq,
+            sparse=sparse,
+            _weight=_weight,
+            device=device,
+            dtype=dtype,
+        )
+
+    def add_null_idx(self):
+        """Additional 0 entry used for masking"""
+        self.weight = nn.Parameter(F.pad(self.weight, (0, 0, 0, 1)))
+
+    def forward(self, input: torch.Tensor) -> torch.Tensor:
+        # default all out of bounds values to `self.null_idx` that will then be mapped to 0
+        # translate for [0, self.max_id - self.min_id[
+        input = torch.where(
+            (self.min_id > input) | (input >= self.max_id),
+            self.null_idx,
+            input - self.min_id,
+        )
+        out = super().forward(input)
+        if self.reduce:
+            torch.distributed.all_reduce(out, group=self.process_group)
+        return out
+
+
+try:
+    import dropout_layer_norm
+
+    class FastLayerNorm(nn.LayerNorm):
+        def forward(self, hidden_states, residual=None):
+            if hidden_states.shape[-1] > 8192:
+                if residual is not None:
+                    hidden_states += residual
+                residual = hidden_states
+
+                return super(FastLayerNorm, self).forward(hidden_states), residual
+            else:
+                (
+                    normed_hidden_states,
+                    residual,
+                    *rest,
+                ) = dropout_layer_norm.dropout_add_ln_fwd(
+                    hidden_states,
+                    residual,
+                    self.weight,
+                    self.bias,
+                    None,
+                    None,
+                    None,
+                    None,
+                    0.0,
+                    self.eps,
+                    1.0,
+                    0,
+                    None,
+                    False,
+                    False,
+                )
+                if residual is None:
+                    residual = hidden_states
+
+                return normed_hidden_states, residual
+
+except ImportError:
+    pass
+
+
+try:
+    from flash_attn.layers.rotary import RotaryEmbedding
+    import rotary_emb
+
+    class PositionRotaryEmbedding(RotaryEmbedding):
+        def _update_cos_sin_cache(self, dtype, device, seqlen):
+            # Reset the tables if the sequence length has changed,
+            # or if we're on a new device (possibly due to tracing for instance)
+            if (
+                seqlen > self._seq_len_cached
+                or self._cos_cached.device != device
+                or self._cos_cached.dtype != dtype
+            ):
+                self._seq_len_cached = seqlen
+                t = torch.arange(seqlen, device=device, dtype=self.inv_freq.dtype)
+                # Don't do einsum, it converts fp32 to fp16
+                # freqs = torch.einsum("i,j->ij", t, self.inv_freq)
+                freqs = torch.outer(t, self.inv_freq.to(device=t.device))
+                self._cos_cached = torch.cos(freqs).to(dtype)
+                self._sin_cached = torch.sin(freqs).to(dtype)
+
+        def get_cos_sin(
+            self, position_ids: torch.Tensor, max_s: int, dtype: torch.dtype
+        ):
+            """
+            Return cos and sin for the asked position ids
+            """
+
+            self._update_cos_sin_cache(dtype, position_ids.device, max_s)
+
+            cos = torch.index_select(self._cos_cached, 0, position_ids)
+            sin = torch.index_select(self._sin_cached, 0, position_ids)
+            return cos.unsqueeze(1), sin.unsqueeze(1)
+
+        def forward(self, qkv: torch.Tensor, cos: torch.Tensor, sin: torch.Tensor):
+            rotary_dim = cos.shape[-1]
+            q1 = qkv[:, 0, :, :rotary_dim]
+            q2 = qkv[:, 0, :, rotary_dim : 2 * rotary_dim]
+            k1 = qkv[:, 1, :, :rotary_dim]
+            k2 = qkv[:, 1, :, rotary_dim : 2 * rotary_dim]
+
+            rotary_emb.apply_rotary(q1, q2, cos, sin, q1, q2, False)
+            rotary_emb.apply_rotary(k1, k2, cos, sin, k1, k2, False)
+            return qkv
+
+except ImportError:
+    pass

server/text_generation_server/utils/tokens.py

@@ -1,9 +1,8 @@
 import re
 import torch
 
-
+from functools import lru_cache
 from transformers import (
-    LogitsProcessorList,
     TemperatureLogitsWarper,
     TopKLogitsWarper,
     TopPLogitsWarper,
@@ -26,8 +25,10 @@ class Sampling:
 
     def __call__(self, logits):
         probs = torch.nn.functional.softmax(logits, -1)
-        next_tokens = torch.multinomial(probs, num_samples=1, generator=self.generator)
+        # Avoid GPU<->CPU sync done by torch multinomial
-        return next_tokens
+        # See: https://github.com/pytorch/pytorch/blob/925a3788ec5c06db62ca732a0e9425a26a00916f/aten/src/ATen/native/Distributions.cpp#L631-L637
+        q = torch.empty_like(probs).exponential_(1, generator=self.generator)
+        return probs.div_(q).argmax()
 
 
 class Greedy:
@@ -35,6 +36,63 @@ class Greedy:
         return logits.argmax(dim=-1)
 
 
+class StaticWarper:
+    def __init__(
+        self,
+        temperature=1.0,
+        top_k=None,
+        top_p=None,
+        typical_p=None,
+    ):
+        self.warpers = []
+
+        if temperature is not None and temperature != 1.0:
+            temperature = float(temperature)
+            self.warpers.append(TemperatureLogitsWarper(temperature))
+        if top_k is not None and top_k != 0:
+            self.warpers.append(TopKLogitsWarper(top_k=top_k))
+        if top_p is not None and top_p < 1.0:
+            self.warpers.append(TopPLogitsWarper(top_p=top_p))
+        if typical_p is not None and typical_p < 1.0:
+            self.warpers.append(TypicalLogitsWarper(mass=typical_p))
+
+        self.cuda_graph = None
+        self.static_scores = None
+        self.static_warped_scores = None
+        self.static_next_logprob = None
+
+    def __call__(self, scores):
+        if self.cuda_graph is None:
+            self.static_scores = scores
+            self.cuda_graph = torch.cuda.CUDAGraph()
+
+            with torch.cuda.graph(self.cuda_graph):
+                for warper in self.warpers:
+                    self.static_warped_scores = warper(None, self.static_scores)
+
+                # Compute logprobs
+                self.static_next_logprob = torch.log_softmax(
+                    self.static_warped_scores, -1
+                )
+
+        self.static_scores.copy_(scores)
+        self.cuda_graph.replay()
+
+        return self.static_warped_scores, self.static_next_logprob
+
+
+@lru_cache(10)
+def static_warper(
+    temperature: Optional[float],
+    top_k: Optional[int],
+    top_p: Optional[float],
+    typical_p: Optional[float],
+) -> StaticWarper:
+    return StaticWarper(
+        temperature=temperature, top_k=top_k, top_p=top_p, typical_p=typical_p
+    )
+
+
 class NextTokenChooser:
     def __init__(
         self,
@@ -48,47 +106,45 @@ class NextTokenChooser:
         seed=0,
         device="cpu",
     ):
-        warpers = LogitsProcessorList()
+        self.watermark_processor = (
-        # the following idea is largely copied from this PR: https://github.com/huggingface/transformers/pull/5420/files
+            WatermarkLogitsProcessor(device=device) if watermark else None
-        # all samplers can be found in `generation_utils_samplers.py`
+        )
-        sampling = do_sample
+        self.repetition_processor = (
+            RepetitionPenaltyLogitsProcessor(penalty=repetition_penalty)
+            if repetition_penalty
+            else None
+        )
 
-        if watermark:
+        has_warpers = (
-            warpers.append(WatermarkLogitsProcessor(device=device))
+            (temperature is not None and temperature != 1.0)
-        if repetition_penalty is not None and repetition_penalty != 1.0:
+            or (top_k is not None and top_k != 0)
-            warpers.append(RepetitionPenaltyLogitsProcessor(penalty=repetition_penalty))
+            or (top_p is not None and top_p < 1.0)
-        if temperature is not None and temperature != 1.0:
+            or (typical_p is not None and typical_p < 1.0)
-            temperature = float(temperature)
+        )
-            warpers.append(TemperatureLogitsWarper(temperature))
+        if has_warpers:
-            sampling = True
+            self.static_warper = static_warper(
-        if top_k is not None and top_k != 0:
+                temperature=temperature, top_k=top_k, top_p=top_p, typical_p=typical_p
-            warpers.append(TopKLogitsWarper(top_k=top_k))
+            )
-            sampling = True
+        else:
-        if top_p is not None and top_p < 1.0:
+            self.static_warper = None
-            warpers.append(TopPLogitsWarper(top_p=top_p))
-            sampling = True
-        if typical_p is not None and typical_p < 1.0:
-            warpers.append(TypicalLogitsWarper(mass=typical_p))
-            sampling = True
 
-        self.warpers = warpers
+        sampling = do_sample or has_warpers
         self.choice = Sampling(seed, device) if sampling else Greedy()
 
     def __call__(self, input_ids, scores):
-        # Warp logits
+        if self.watermark_processor:
-        if scores.shape[0] > 1:
+            scores = self.watermark_processor(input_ids, scores)
-            # only warp the last token logits
+        if self.repetition_processor:
-            scores[-1:, :] = self.warpers(input_ids, scores[-1:, :])
+            scores = self.repetition_processor(input_ids, scores)
+
+        if self.static_warper is None:
+            next_logprob = torch.log_softmax(scores, -1)
         else:
-            scores = self.warpers(input_ids, scores)
+            scores, next_logprob = self.static_warper(scores)
 
-        # Compute logprobs
+        next_id = self.choice(scores[-1]).view(1, 1)
-        logprobs = torch.log_softmax(scores, -1)
 
-        # Choose tokens
+        return next_id, next_logprob
-        next_id = self.choice(scores[-1])
-
-        return next_id.view(1, 1), logprobs
 
     @classmethod
     def from_pb(