[CI/BUILD] Support non-AVX512 vLLM building and testing (#5574)

.buildkite/run-cpu-test.sh

@@ -4,17 +4,20 @@ set -ex
 
 # Try building the docker image
 docker build -t cpu-test -f Dockerfile.cpu .
+docker build --build-arg VLLM_CPU_DISABLE_AVX512="true" -t cpu-test-avx2 -f Dockerfile.cpu .
 
 # Setup cleanup
-remove_docker_container() { docker rm -f cpu-test || true; }
+remove_docker_container() { docker rm -f cpu-test cpu-test-avx2 || true; }
 trap remove_docker_container EXIT
 remove_docker_container
 
 # Run the image
 docker run -itd -v ~/.cache/huggingface:/root/.cache/huggingface --cpuset-cpus=48-95 --cpuset-mems=1 --network host -e HF_TOKEN --env VLLM_CPU_KVCACHE_SPACE=4 --name cpu-test cpu-test
+docker run -itd -v ~/.cache/huggingface:/root/.cache/huggingface --cpuset-cpus=48-95 --cpuset-mems=1 --network host -e HF_TOKEN --env VLLM_CPU_KVCACHE_SPACE=4 --name cpu-test-avx2 cpu-test-avx2
 
 # offline inference
 docker exec cpu-test bash -c "python3 examples/offline_inference.py"
+docker exec cpu-test-avx2 bash -c "python3 examples/offline_inference.py"
 
 # Run basic model test
 docker exec cpu-test bash -c "cd tests;

Dockerfile.cpu

@@ -21,6 +21,10 @@ WORKDIR /workspace/vllm
 
 RUN pip install -v -r requirements-cpu.txt --extra-index-url https://download.pytorch.org/whl/cpu
 
+# Support for building with non-AVX512 vLLM: docker build --build-arg VLLM_CPU_DISABLE_AVX512="true" ...
+ARG VLLM_CPU_DISABLE_AVX512
+ENV VLLM_CPU_DISABLE_AVX512=${VLLM_CPU_DISABLE_AVX512}
+
 RUN VLLM_TARGET_DEVICE=cpu python3 setup.py install
 
 WORKDIR /workspace/

cmake/cpu_extension.cmake

@@ -33,10 +33,21 @@ function (find_isa CPUINFO TARGET OUT)
     endif()
 endfunction()
 
+function (is_avx512_disabled OUT)
+    set(DISABLE_AVX512 $ENV{VLLM_CPU_DISABLE_AVX512})
+    if(DISABLE_AVX512 AND DISABLE_AVX512 STREQUAL "true")
+        set(${OUT} ON PARENT_SCOPE)
+    else()
+        set(${OUT} OFF PARENT_SCOPE)
+    endif()
+endfunction()
+
+is_avx512_disabled(AVX512_DISABLED)
+
 find_isa(${CPUINFO} "avx2" AVX2_FOUND)
 find_isa(${CPUINFO} "avx512f" AVX512_FOUND)
 
-if (AVX512_FOUND)
+if (AVX512_FOUND AND NOT AVX512_DISABLED)
     list(APPEND CXX_COMPILE_FLAGS
         "-mavx512f"
         "-mavx512vl"