Add gen_gemm_sm100_module_cutlass_mxfp8 to jit-cache

[yongwww]

📌 Description

follow-up #2464

🔍 Related Issues

🚀 Pull Request Checklist

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🧪 Tests

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Reviewer Notes

Summary by CodeRabbit

• New Features
  • Added mixed FP8 (mxfp8) precision support for SM100 GPUs, expanding available kernel variants for more flexible computation options.

[gemini-code-assist]

Summary of Changes

Hello @yongwww, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request enhances the JIT compilation system for the SM100 GPU architecture by incorporating a new GEMM module specifically designed for mixed-precision FP8 operations. This integration ensures that the system can dynamically compile and optimize kernels utilizing this new data type, potentially leading to improved performance and broader hardware compatibility for relevant computations.

Highlights

• JIT Cache Extension: The gen_gemm_sm100_module_cutlass_mxfp8 function has been added to the JIT compilation cache for the SM100 architecture, expanding support for mixed-precision floating-point operations.

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Changelog

• flashinfer/aot.py
  • Imported gen_gemm_sm100_module_cutlass_mxfp8.
  • Registered gen_gemm_sm100_module_cutlass_mxfp8 within the gen_all_modules function for SM100 architecture.

Activity

• This pull request is a follow-up to feat: Add MXFP8 GEMM mm_mxfp8 (cutlass) #2464.

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[gemini-code-assist]

Code Review

This pull request aims to add the gen_gemm_sm100_module_cutlass_mxfp8 module to the AOT build cache. While the changes correctly add the necessary import and function call, my review of the context files reveals a critical issue in the underlying implementation of this module. It appears to be restricted to CUDA versions 10 and 11, which is incompatible with the sm100 (Blackwell) architecture that requires CUDA 12.8+. Adding this module to the build will likely cause AOT compilation to fail for Blackwell GPUs. Therefore, I have recommended removing these changes until the module is fixed.

[yzh119]

Gemini's suggestion doesn't look reasonable to me.

[coderabbitai]

📝 Walkthrough

Walkthrough

A new GEMM module generator for SM100 with mixed FP8 precision support is introduced. The generator function is imported from the gemm module and integrated into the AOT module generation flow, expanding the available kernel variants.

Changes

Cohort / File(s)	Summary
SM100 GEMM mxfp8 Support flashinfer/aot.py, flashinfer/jit/gemm	Adds gen_gemm_sm100_module_cutlass_mxfp8 generator function and integrates it into the SM100 JIT spec generation sequence alongside existing FP4/FP8 variants.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~5 minutes

Suggested labels

v0.6.3

Suggested reviewers

• djmmoss
• cyx-6
• yzh119
• wenscarl

Poem

🐰 A GEMM variant hops into view,
mxfp8 precision, shiny and new,
SM100 kernels multiply with delight,
Cutlass threads weaving math so bright! ✨

🚥 Pre-merge checks | ✅ 1 | ❌ 3

❌ Failed checks (2 warnings, 1 inconclusive)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.
Merge Conflict Detection	⚠️ Warning	❌ Merge conflicts detected (2 files): ⚔️ flashinfer/aot.py (content) ⚔️ flashinfer/utils.py (content) These conflicts must be resolved before merging into main.	Resolve conflicts locally and push changes to this branch.
Description check	❓ Inconclusive	The description includes the template structure but lacks meaningful content in the required Description section, only referencing a follow-up PR without explaining the actual changes or rationale.	Expand the Description section to explain what changes are being made, why they're needed, and the purpose of adding mxfp8 support. Consider also marking relevant checklist items if applicable.

✅ Passed checks (1 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly and concisely describes the main change: adding a new GEMM module generator function (gen_gemm_sm100_module_cutlass_mxfp8) to the JIT cache.

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✨ Finishing touches

• 📝 Generate docstrings

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment

⚔️ Resolve merge conflicts (beta)

• Auto-commit resolved conflicts to branch aot-gen_gemm_sm100_module_cutlass_mxfp8
• Post resolved changes as copyable diffs in a comment

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