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[GG] build: pin CUTLASS DSL 4.5.3 for SM120 W4A16 #128

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Merged
voipmonitor merged 1 commit into from
Jul 20, 2026
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[GG] build: pin CUTLASS DSL 4.5.3 for SM120 W4A16 #128

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4 changes: 3 additions & 1 deletion requirements/cuda.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -24,7 +24,9 @@ nvtx==0.2.15
fastsafetensors >= 0.3.2

# QuACK and Cutlass DSL for FA4 (cute-DSL implementation)
nvidia-cutlass-dsl[cu13]==4.6.0
# 4.6.0 spills the SM120 B12X W4A16 prefill kernel (255 registers and a
# 256-byte stack per thread); 4.5.3 restores spill-free code generation.
nvidia-cutlass-dsl[cu13]==4.5.3
Comment on lines +27 to +29

@coderabbitai coderabbitai Bot Jul 18, 2026

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🎯 Functional Correctness | 🟠 Major | ⚡ Quick win

Update the CUDA 12 CI selector rewrite for the exact pin.

This change from a >= requirement to ==4.5.3 means the rewrite in .github/workflows/scripts/build.sh:11-16, which only matches nvidia-cutlass-dsl[cu13]>=, no longer strips [cu13]. CUDA 12 CI therefore resolves this differently from docker/Dockerfile:245-267 and setup.py:1080-1103.

Make the CI rewrite match the package name independently of the version operator, or retain a requirement syntax compatible with that script.

🤖 Prompt for AI Agents 
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

In `@requirements/cuda.txt` around lines 27 - 29, Update the CUDA 12 dependency
rewrite in the build script around its nvidia-cutlass-dsl matching logic so it
recognizes the pinned ==4.5.3 requirement and removes the [cu13] extra
consistently with the Dockerfile and setup.py paths. Match the package
independently of the version operator rather than reverting the exact pin.

quack-kernels>=0.4.0 # Required for tml-fa4

# Tokenspeed_MLA for faster mla with spec decode
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