---
id: pr-flashinfer-1491
repo: flashinfer-ai/flashinfer
pr: 1491
title: 'Perf: support scale_a/scale_b instead of combined scale in cutlass bmm_fp8'
author: ttyio
date: '2025-08-17'
url: https://github.com/flashinfer-ai/flashinfer/pull/1491
source_category: upstream-code
architectures:
- sm100
tags:
- fp8
- gemm
techniques: []
hardware_features:
- fp8
kernel_types:
- gemm
languages:
- cuda-cpp
captured_at: '2026-04-27'
status: merged
merge_sha: 6518ce42a8a3d4d32c2262b638c63049c02a3d62
inclusion_reason: kernel file changes
changed_paths:
- csrc/fp8_gemm_cutlass.cu
- flashinfer/gemm.py
- include/flashinfer/gemm/fp8_gemm_cutlass.h
- include/flashinfer/gemm/fp8_gemm_cutlass_template.h
- include/flashinfer/gemm/fp8_gemm_template_sm100.h
head_ref_oid: 06747c3fc9804440117317713332b5ad00ce57ae
artifact_dir: evidence/pull-bundles/flashinfer/gh-1491
---
# Perf: support scale_a/scale_b instead of combined scale in cutlass bmm_fp8

- Repository: `flashinfer-ai/flashinfer`
- PR: [1491](https://github.com/flashinfer-ai/flashinfer/pull/1491)
- Decision: `kernel file changes`
- Reason: kernel file changes

## Changed Paths

- `csrc/fp8_gemm_cutlass.cu`
- `flashinfer/gemm.py`
- `include/flashinfer/gemm/fp8_gemm_cutlass.h`
- `include/flashinfer/gemm/fp8_gemm_cutlass_template.h`
- `include/flashinfer/gemm/fp8_gemm_template_sm100.h`

## Evidence Bundle

`evidence/pull-bundles/flashinfer/gh-1491`
