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[NVIDIA] fix(jit): enable GDC for CUTLASS fused MoE PDL — prevent random crashes on SM12x #2913

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[NVIDIA] fix(jit): enable GDC for CUTLASS fused MoE PDL — prevent random crashes on SM12x #2913

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0f260d6
feat: enable GDC for SM90 and SM100 in CUDA compilation
johnnynunez Mar 29, 2026
5064ce7
feat: enable GDC for SM90 and SM100 in CUDA compilation
johnnynunez Mar 29, 2026
b9d21ec
Merge branch 'flashinfer-ai:main' into main
johnnynunez Mar 31, 2026
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18 changes: 18 additions & 0 deletions ...tensorrt_llm/cutlass_extensions/include/cutlass_extensions/arch/grid_dependency_control.h
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Original file line number Diff line number Diff line change
Expand Up @@ -33,6 +33,24 @@
#endif
#endif

#ifndef CUTLASS_GDC_ENABLED
#if (CUDA_BARRIER_ENABLED && defined(CUTLASS_ENABLE_GDC_FOR_SM100) && defined(__CUDA_ARCH__) && \
((__CUDA_ARCH__ == 1000 && \
(defined(__CUDA_ARCH_FEAT_SM100_ALL) || CUDA_ARCH_FAMILY(1000))) || \
(__CUDA_ARCH__ == 1010 && \
(defined(__CUDA_ARCH_FEAT_SM101_ALL) || CUDA_ARCH_FAMILY(1010))) || \
(__CUDA_ARCH__ == 1100 && \
(defined(__CUDA_ARCH_FEAT_SM110_ALL) || CUDA_ARCH_FAMILY(1100))) || \
(__CUDA_ARCH__ == 1030 && \
(defined(__CUDA_ARCH_FEAT_SM103_ALL) || CUDA_ARCH_FAMILY(1030))) || \
(__CUDA_ARCH__ == 1200 && \
(defined(__CUDA_ARCH_FEAT_SM120_ALL) || CUDA_ARCH_FAMILY(1200))) || \
(__CUDA_ARCH__ == 1210 && \
(defined(__CUDA_ARCH_FEAT_SM121_ALL) || CUDA_ARCH_CONDITIONAL_OR_FAMILY(1210)))))
#define CUTLASS_GDC_ENABLED
#endif
#endif

namespace cutlass {
namespace arch {

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5 changes: 5 additions & 0 deletions flashinfer/jit/fused_moe.py
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Original file line number Diff line number Diff line change
Expand Up @@ -38,6 +38,7 @@ def gen_cutlass_fused_moe_sm120_module(use_fast_build: bool = False) -> JitSpec:
"-DENABLE_FP8",
"-DENABLE_FP4",
"-DUSING_OSS_CUTLASS_MOE_GEMM",
"-DCUTLASS_ENABLE_GDC_FOR_SM100=1",
]

nvcc_flags += current_compilation_context.get_nvcc_flags_list(
Expand All @@ -56,6 +57,7 @@ def gen_cutlass_fused_moe_sm103_module(use_fast_build: bool = False) -> JitSpec:
"-DENABLE_FP4",
"-DUSING_OSS_CUTLASS_MOE_GEMM",
"-DCOMPILE_BLACKWELL_SM103_TMA_GROUPED_GEMMS",
"-DCUTLASS_ENABLE_GDC_FOR_SM100=1",
]

nvcc_flags += current_compilation_context.get_nvcc_flags_list(
Expand All @@ -73,6 +75,7 @@ def gen_cutlass_fused_moe_sm100_module(use_fast_build: bool = False) -> JitSpec:
"-DENABLE_FP8",
"-DENABLE_FP4",
"-DUSING_OSS_CUTLASS_MOE_GEMM",
"-DCUTLASS_ENABLE_GDC_FOR_SM100=1",
]

nvcc_flags += current_compilation_context.get_nvcc_flags_list(
Expand All @@ -91,6 +94,7 @@ def gen_cutlass_fused_moe_sm90_module(use_fast_build: bool = False) -> JitSpec:
"-DENABLE_FP8_BLOCK_SCALE" if is_cuda_version_at_least("12.8") else "",
"-DENABLE_FP4" if is_cuda_version_at_least("12.8") else "",
"-DUSING_OSS_CUTLASS_MOE_GEMM",
"-DCUTLASS_ENABLE_GDC_FOR_SM90=1",
]
return gen_cutlass_fused_moe_module(nvcc_flags, "90", use_fast_build)

Expand Down Expand Up @@ -304,6 +308,7 @@ def gen_trtllm_gen_fused_moe_sm100_module() -> JitSpec:
"-DENABLE_BF16",
"-DENABLE_FP8",
"-DENABLE_FP4",
"-DCUTLASS_ENABLE_GDC_FOR_SM100=1",
f'-DTLLM_GEN_GEMM_CUBIN_PATH=\\"{ArtifactPath.TRTLLM_GEN_BMM}\\"',
]
+ nvcc_flags,
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1 change: 1 addition & 0 deletions flashinfer/jit/gemm/fp8_blockscale.py
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Expand Up @@ -14,6 +14,7 @@ def gen_fp8_blockscale_gemm_sm90_module(use_fast_build: bool = False) -> JitSpec
"-DENABLE_BF16",
"-DENABLE_FP8",
*(("-DENABLE_FP8_BLOCK_SCALE",) if is_cuda_version_at_least("12.8") else ()),
"-DCUTLASS_ENABLE_GDC_FOR_SM90=1",
]

return gen_jit_spec(
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