Run VLLM in Spark

Accelerated Computing DGX Spark / GB10 User Forum DGX Spark / GB10
10

I finally managed to build working VLLM on host system outside of the container.

If you are getting this error:

ImportError: /home/eugr/vllm/vllm/vllm/_C.abi3.so: undefined symbol: _Z20cutlass_moe_mm_sm100RN2at6TensorERKS0_S3_S3_S3_S3_S3_S3_S3_S3_bb

Please continue reading:

Follow @johnny_nv instructions from the original post, but just before the build step (uv pip install --no-build-isolation -e .), apply the patch below (until this PR is merged into main branch).

cat <<'EOF' | patch -p1
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 7cb94f919..f860e533e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -594,9 +594,9 @@ if(VLLM_GPU_LANG STREQUAL "CUDA")
 
   # FP4 Archs and flags
   if(${CMAKE_CUDA_COMPILER_VERSION} VERSION_GREATER_EQUAL 13.0)
-    cuda_archs_loose_intersection(FP4_ARCHS "10.0f;11.0f;12.0f" "${CUDA_ARCHS}")
+    cuda_archs_loose_intersection(FP4_ARCHS "10.0f" "${CUDA_ARCHS}")
   else()
-    cuda_archs_loose_intersection(FP4_ARCHS "10.0a;10.1a;12.0a;12.1a" "${CUDA_ARCHS}")
+    cuda_archs_loose_intersection(FP4_ARCHS "10.0a;10.1a" "${CUDA_ARCHS}")
   endif()
   if(${CMAKE_CUDA_COMPILER_VERSION} VERSION_GREATER_EQUAL 12.8 AND FP4_ARCHS)
     set(SRCS
@@ -668,7 +668,7 @@ if(VLLM_GPU_LANG STREQUAL "CUDA")
   endif()
 
   if(${CMAKE_CUDA_COMPILER_VERSION} VERSION_GREATER_EQUAL 13.0)
-    cuda_archs_loose_intersection(SCALED_MM_ARCHS "10.0f;11.0f" "${CUDA_ARCHS}")
+    cuda_archs_loose_intersection(SCALED_MM_ARCHS "10.0f" "${CUDA_ARCHS}")
   else()
     cuda_archs_loose_intersection(SCALED_MM_ARCHS "10.0a" "${CUDA_ARCHS}")
   endif()
@@ -716,9 +716,9 @@ if(VLLM_GPU_LANG STREQUAL "CUDA")
   endif()
 
   if(${CMAKE_CUDA_COMPILER_VERSION} VERSION_GREATER_EQUAL 13.0)
-    cuda_archs_loose_intersection(SCALED_MM_ARCHS "10.0f;11.0f;12.0f" "${CUDA_ARCHS}")
+    cuda_archs_loose_intersection(SCALED_MM_ARCHS "10.0f" "${CUDA_ARCHS}")
   else()
-    cuda_archs_loose_intersection(SCALED_MM_ARCHS "10.0a;10.1a;10.3a;12.0a;12.1a" "${CUDA_ARCHS}")
+    cuda_archs_loose_intersection(SCALED_MM_ARCHS "10.0a;10.1a;10.3a" "${CUDA_ARCHS}")
   endif()
   if(${CMAKE_CUDA_COMPILER_VERSION} VERSION_GREATER_EQUAL 12.8 AND SCALED_MM_ARCHS)
     set(SRCS "csrc/quantization/w8a8/cutlass/moe/blockwise_scaled_group_mm_sm100.cu")
EOF

Then run build:

uv pip install --no-build-isolation -e .
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