Installation with ROCm#

vLLM 0.2.4 onwards supports model inferencing and serving on AMD GPUs with ROCm. At the moment AWQ quantization is not supported in ROCm, but SqueezeLLM quantization has been ported. Data types currently supported in ROCm are FP16 and BF16.

Requirements#

  • OS: Linux

  • Python: 3.8 – 3.11

  • GPU: MI200s (gfx90a), MI300 (gfx942)

  • Pytorch 2.0.1/2.1.1/2.2

  • ROCm 5.7 (Verified on python 3.10) or ROCm 6.0 (Verified on python 3.9)

Installation options:

  1. (Recommended) Quick start with vLLM pre-installed in Docker Image

  2. Build from source

  3. Build from source with docker

Option 2: Build from source#

You can build and install vLLM from source:

Below instruction is for ROCm 5.7 only. At the time of this documentation update, PyTorch on ROCm 6.0 wheel is not yet available on the PyTorch website.

  1. Install prerequisites (skip if you are already in an environment/docker with the following installed):

  • ROCm

  • Pytorch

    $ pip install torch==2.2.0.dev20231206+rocm5.7 --index-url https://download.pytorch.org/whl/nightly/rocm5.7 # tested version
    
  1. Install flash attention for ROCm

    Install ROCm’s flash attention (v2.0.4) following the instructions from ROCmSoftwarePlatform/flash-attention

Note

  • If you are using rocm5.7 with pytorch 2.1.0 onwards, you don’t need to apply the hipify_python.patch. You can build the ROCm flash attention directly.

  • If you fail to install ROCmSoftwarePlatform/flash-attention, try cloning from the commit 6fd2f8e572805681cd67ef8596c7e2ce521ed3c6.

  • ROCm’s Flash-attention-2 (v2.0.4) does not support sliding windows attention.

  • You might need to downgrade the “ninja” version to 1.10 it is not used when compiling flash-attention-2 (e.g. pip install ninja==1.10.2.4)

  1. Setup xformers==0.0.23 without dependencies, and apply patches to adapt for ROCm flash attention

    $ pip install xformers==0.0.23 --no-deps
    $ bash patch_xformers.rocm.sh
    
  2. Build vLLM.

    $ cd vllm
    $ pip install -U -r requirements-rocm.txt
    $ python setup.py install # This may take 5-10 minutes. Currently, `pip install .`` does not work for ROCm installation
    

Option 3: Build from source with docker#

You can build and install vLLM from source:

Build a docker image from Dockerfile.rocm, and launch a docker container.

The Dokerfile.rocm is designed to support both ROCm 5.7 and ROCm 6.0 and later versions. It provides flexibility to customize the build of docker image using the following arguments:

  • BASE_IMAGE: specifies the base image used when running docker build, specifically the PyTorch on ROCm base image. We have tested ROCm 5.7 and ROCm 6.0. The default is rocm/pytorch:rocm6.0_ubuntu20.04_py3.9_pytorch_2.1.1

  • FX_GFX_ARCHS: specifies the GFX architecture that is used to build flash-attention, for example, gfx90a;gfx942 for MI200 and MI300. The default is gfx90a;gfx942

  • FA_BRANCH: specifies the branch used to build the flash-attention in ROCmSoftwarePlatform’s flash-attention repo. The default is 3d2b6f5

Their values can be passed in when running docker build with --build-arg options.

For example, to build docker image for vllm on ROCm 5.7, you can run:

$ docker build --build-arg BASE_IMAGE="rocm/pytorch:rocm5.7_ubuntu22.04_py3.10_pytorch_2.0.1" \
   -f Dockerfile.rocm -t vllm-rocm .

To build vllm on ROCm 6.0, you can use the default:

$ docker build -f Dockerfile.rocm -t vllm-rocm .
$ docker run -it \
   --network=host \
   --group-add=video \
   --ipc=host \
   --cap-add=SYS_PTRACE \
   --security-opt seccomp=unconfined \
   --device /dev/kfd \
   --device /dev/dri \
   -v <path/to/model>:/app/model \
   vllm-rocm \
   bash

Alternatively, if you plan to install vLLM-ROCm on a local machine or start from a fresh docker image (e.g. rocm/pytorch), you can follow the steps below:

  1. Install prerequisites (skip if you are already in an environment/docker with the following installed):

  1. Install flash attention for ROCm

    Install ROCm’s flash attention (v2.0.4) following the instructions from ROCmSoftwarePlatform/flash-attention

Note

  • If you are using rocm5.7 with pytorch 2.1.0 onwards, you don’t need to apply the hipify_python.patch. You can build the ROCm flash attention directly.

  • If you fail to install ROCmSoftwarePlatform/flash-attention, try cloning from the commit 6fd2f8e572805681cd67ef8596c7e2ce521ed3c6.

  • ROCm’s Flash-attention-2 (v2.0.4) does not support sliding windows attention.

  • You might need to downgrade the “ninja” version to 1.10 it is not used when compiling flash-attention-2 (e.g. pip install ninja==1.10.2.4)

  1. Setup xformers==0.0.23 without dependencies, and apply patches to adapt for ROCm flash attention

    $ pip install xformers==0.0.23 --no-deps
    $ bash patch_xformers.rocm.sh
    
  2. Build vLLM.

    $ cd vllm
    $ pip install -U -r requirements-rocm.txt
    $ python setup.py install # This may take 5-10 minutes.
    

Note

  • You may need to turn on the --enforce-eager flag if you experience process hang when running the benchmark_thoughput.py script to test your installation.