diff --git a/CMakeLists.txt b/CMakeLists.txt index 5acbd762..bfe43593 100644 --- a/CMakeLists.txt +++ b/CMakeLists.txt @@ -206,7 +206,19 @@ if(VLLM_GPU_LANG STREQUAL "CUDA") # Set CUTLASS_REVISION manually -- its revision detection doesn't work in this case. set(CUTLASS_REVISION "v3.5.1" CACHE STRING "CUTLASS revision to use") - FetchContent_Declare( + # Use the specified CUTLASS source directory for compilation if VLLM_CUTLASS_SRC_DIR is provided + if (DEFINED ENV{VLLM_CUTLASS_SRC_DIR}) + set(VLLM_CUTLASS_SRC_DIR $ENV{VLLM_CUTLASS_SRC_DIR}) + endif() + + if(VLLM_CUTLASS_SRC_DIR) + if(NOT IS_ABSOLUTE VLLM_CUTLASS_SRC_DIR) + get_filename_component(VLLM_CUTLASS_SRC_DIR "${VLLM_CUTLASS_SRC_DIR}" ABSOLUTE) + endif() + message(STATUS "The VLLM_CUTLASS_SRC_DIR is set, using ${VLLM_CUTLASS_SRC_DIR} for compilation") + FetchContent_Declare(cutlass SOURCE_DIR ${VLLM_CUTLASS_SRC_DIR}) + else() + FetchContent_Declare( cutlass GIT_REPOSITORY https://github.com/nvidia/cutlass.git GIT_TAG v3.5.1 @@ -216,7 +228,8 @@ if(VLLM_GPU_LANG STREQUAL "CUDA") # Important: If GIT_SHALLOW is enabled then GIT_TAG works only with branch names and tags. # So if the GIT_TAG above is updated to a commit hash, GIT_SHALLOW must be set to FALSE GIT_SHALLOW TRUE - ) + ) + endif() FetchContent_MakeAvailable(cutlass) list(APPEND VLLM_EXT_SRC diff --git a/docs/source/getting_started/installation.rst b/docs/source/getting_started/installation.rst index f02626bd..e3dbbc9a 100644 --- a/docs/source/getting_started/installation.rst +++ b/docs/source/getting_started/installation.rst @@ -170,6 +170,18 @@ To build vLLM using an existing PyTorch installation: $ pip install -e . --no-build-isolation +Use the local cutlass for compilation +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +Currently, before starting the build process, vLLM fetches cutlass code from GitHub. However, there may be scenarios where you want to use a local version of cutlass instead. +To achieve this, you can set the environment variable VLLM_CUTLASS_SRC_DIR to point to your local cutlass directory. + +.. code-block:: console + + $ git clone https://github.com/vllm-project/vllm.git + $ cd vllm + $ VLLM_CUTLASS_SRC_DIR=/path/to/cutlass pip install -e . + + Troubleshooting ~~~~~~~~~~~~~~~