[cpu][ci] Add initial set of tests for Arm CPUs (#28657)

Signed-off-by: Fadi Arafeh <fadi.arafeh@arm.com>

.buildkite/scripts/hardware_ci/run-cpu-test-arm.sh

+#!/bin/bash
+
+# This script build the CPU docker image and run the offline inference inside the container.
+# It serves a sanity check for compilation and basic model usage.
+set -ex
+
+# allow to bind to different cores
+CORE_RANGE=${CORE_RANGE:-0-16}
+OMP_CORE_RANGE=${OMP_CORE_RANGE:-0-16}
+NUMA_NODE=${NUMA_NODE:-0}
+
+export CMAKE_BUILD_PARALLEL_LEVEL=32
+
+# Setup cleanup
+remove_docker_container() {
+    set -e;
+    docker rm -f cpu-test-"$NUMA_NODE" || true;
+}
+trap remove_docker_container EXIT
+remove_docker_container
+
+# Try building the docker image
+numactl -C "$CORE_RANGE" -N "$NUMA_NODE" docker build --tag cpu-test-"$NUMA_NODE" --target vllm-test -f docker/Dockerfile.cpu .
+
+# Run the image, setting --shm-size=4g for tensor parallel.
+docker run -itd --cpuset-cpus="$CORE_RANGE" --cpuset-mems="$NUMA_NODE" --entrypoint /bin/bash -v ~/.cache/huggingface:/root/.cache/huggingface --privileged=true -e HF_TOKEN --env VLLM_CPU_KVCACHE_SPACE=16 --env VLLM_CPU_CI_ENV=1 -e E2E_OMP_THREADS="$OMP_CORE_RANGE" --shm-size=4g --name cpu-test-"$NUMA_NODE" cpu-test-"$NUMA_NODE"
+
+function cpu_tests() {
+  set -e
+  export NUMA_NODE=$2
+
+  docker exec cpu-test-"$NUMA_NODE" bash -c "
+    set -e
+    pip list"
+
+  # offline inference
+  docker exec cpu-test-"$NUMA_NODE" bash -c "
+    set -e
+    python3 examples/offline_inference/basic/generate.py --model facebook/opt-125m"
+
+  # Run kernel tests
+  docker exec cpu-test-"$NUMA_NODE" bash -c "
+    set -e
+    pytest -x -v -s tests/kernels/test_onednn.py
+    pytest -x -v -s tests/kernels/attention/test_cpu_attn.py"
+
+  # basic online serving
+  docker exec cpu-test-"$NUMA_NODE" bash -c '
+    set -e
+    VLLM_CPU_OMP_THREADS_BIND=$E2E_OMP_THREADS vllm serve meta-llama/Llama-3.2-3B-Instruct --max-model-len 2048 &
+    server_pid=$!
+    timeout 600 bash -c "until curl localhost:8000/v1/models; do sleep 1; done" || exit 1
+    vllm bench serve \
+      --backend vllm \
+      --dataset-name random \
+      --model meta-llama/Llama-3.2-3B-Instruct \
+      --num-prompts 20 \
+      --endpoint /v1/completions
+    kill -s SIGTERM $server_pid &'
+}
+
+# All of CPU tests are expected to be finished less than 40 mins.
+export -f cpu_tests
+timeout 2h bash -c "cpu_tests $CORE_RANGE $NUMA_NODE"

docker/Dockerfile.cpu

@@ -37,6 +37,7 @@ RUN --mount=type=cache,target=/var/cache/apt,sharing=locked \
     && update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-12 10 --slave /usr/bin/g++ g++ /usr/bin/g++-12 \
     && curl -LsSf https://astral.sh/uv/install.sh | sh
 
+ENV CC=/usr/bin/gcc-12 CXX=/usr/bin/g++-12
 ENV CCACHE_DIR=/root/.cache/ccache
 ENV CMAKE_CXX_COMPILER_LAUNCHER=ccache
 
@@ -122,6 +123,15 @@ WORKDIR /workspace/vllm
 RUN --mount=type=bind,src=requirements/test.in,target=requirements/test.in \
     cp requirements/test.in requirements/cpu-test.in && \
     sed -i '/mamba_ssm/d' requirements/cpu-test.in && \
+    remove_packages_not_supported_on_aarch64() { \
+      case "$(uname -m)" in \
+        aarch64|arm64) \
+          sed -i '/decord/d' requirements/cpu-test.in; \
+          sed -i '/terratorch/d' requirements/cpu-test.in; \
+          ;; \
+      esac; \
+    }; \
+    remove_packages_not_supported_on_aarch64 && \
     sed -i 's/^torch==.*/torch==2.8.0/g' requirements/cpu-test.in && \
     sed -i 's/torchaudio.*/torchaudio/g' requirements/cpu-test.in && \
     sed -i 's/torchvision.*/torchvision/g' requirements/cpu-test.in && \