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docs/source/conceptual/tensor_parallelism.md
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# Tensor Parallelism
Tensor parallelism is a technique used to fit a large model in multiple GPUs. Intermediate outputs between GPUs are sent and received from one GPU to another in a synchronous or asynchronous manner. For example, when multiplying the input tensors with the first weights tensor, multiplying both tensors is equivalent to splitting the weight tensor column-wise, multiplying each column with input separately, and then concatenating the separate outputs like below 👇
Tensor parallelism is a technique used to fit a large model in multiple GPUs. For example, when multiplying the input tensors with the first weight tensor, multiplying both tensors is equivalent to splitting the weight tensor column-wise, multiplying each column with input separately, and then concatenating the separate outputs. These outputs are then sent between GPUs and then concatenated together to get the final result, like below 👇
![Image courtesy of Anton Lozkhov](https://huggingface.co/datasets/huggingface/documentation-images/resolve/main/tgi/TP.png)