2903c65533
Support for legacy configuration has been removed from SPDK at this point. This patch focuses on adjustement in documentation and examples. Signed-off-by: Tomasz Zawadzki <tomasz.zawadzki@intel.com> Change-Id: Icfe8baf7a7497ffa86fde9038001429c5a7bc4f6 Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/4801 Tested-by: SPDK CI Jenkins <sys_sgci@intel.com> Reviewed-by: Jim Harris <james.r.harris@intel.com> Reviewed-by: Aleksey Marchuk <alexeymar@mellanox.com> Reviewed-by: Paul Luse <paul.e.luse@intel.com>
72 lines
2.2 KiB
Markdown
72 lines
2.2 KiB
Markdown
# Introduction
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This directory contains a plug-in module for fio to enable use
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with SPDK. Fio is free software published under version 2 of
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the GPL license.
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# Compiling fio
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Clone the fio source repository from https://github.com/axboe/fio
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git clone https://github.com/axboe/fio
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cd fio
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Compile the fio code and install:
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make
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make install
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# Compiling SPDK
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Clone the SPDK source repository from https://github.com/spdk/spdk
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git clone https://github.com/spdk/spdk
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cd spdk
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git submodule update --init
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Then, run the SPDK configure script to enable fio (point it to the root of the fio repository):
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cd spdk
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./configure --with-fio=/path/to/fio/repo <other configuration options>
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Finally, build SPDK:
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make
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**Note to advanced users**: These steps assume you're using the DPDK submodule. If you are using your
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own version of DPDK, the fio plugin requires that DPDK be compiled with -fPIC. You can compile DPDK
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with -fPIC by modifying your DPDK configuration file and adding the line:
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EXTRA_CFLAGS=-fPIC
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# Usage
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To use the SPDK fio plugin with fio, specify the plugin binary using LD_PRELOAD when running
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fio and set ioengine=spdk_bdev in the fio configuration file (see example_config.fio in the same
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directory as this README).
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LD_PRELOAD=<path to spdk repo>/build/fio/spdk_bdev fio
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The fio configuration file must contain one new parameter:
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spdk_json_conf=./examples/bdev/fio_plugin/bdev.json
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You can specify which block device to run against by setting the filename parameter
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to the block device name:
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filename=Malloc0
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Or for NVMe devices:
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filename=Nvme0n1
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Currently the SPDK fio plugin is limited to the thread usage model, so fio jobs must also specify thread=1
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when using the SPDK fio plugin.
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fio also currently has a race condition on shutdown if dynamically loading the ioengine by specifying the
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engine's full path via the ioengine parameter - LD_PRELOAD is recommended to avoid this race condition.
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When testing random workloads, it is recommended to set norandommap=1. fio's random map
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processing consumes extra CPU cycles which will degrade performance over time with
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the fio_plugin since all I/O are submitted and completed on a single CPU core.
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