---
id: pr-cutlass-2965
repo: NVIDIA/cutlass
pr: 2965
title: '[Bug Fix]Set NumSplitsM to 1 when TileShapeM < 128 in sm90 fp8 blockwise scaling CollectiveMma'
author: HydraQYH
date: '2026-01-23'
url: https://github.com/NVIDIA/cutlass/pull/2965
source_category: upstream-code
architectures:
- sm100
- sm90
tags:
- fp8
- gemm
- tma
techniques: []
hardware_features:
- fp8
- tma
kernel_types:
- gemm
languages:
- cuda-cpp
captured_at: '2026-04-17'
status: merged
merge_sha: 2fafefb7b9c7e233c1cfb258f38139a6406d1511
inclusion_reason: kernel file changes
changed_paths:
- include/cutlass/gemm/collective/sm90_mma_array_tma_gmma_ss_warpspecialized_fp8_blockwise_scaling.hpp
head_ref_oid: 11dde4086c69b30f543ef6c751d202a4f412b3b2
artifact_dir: evidence/pull-bundles/cutlass/gh-2965
---
# [Bug Fix]Set NumSplitsM to 1 when TileShapeM < 128 in sm90 fp8 blockwise scaling CollectiveMma

- Repository: `NVIDIA/cutlass`
- PR: [2965](https://github.com/NVIDIA/cutlass/pull/2965)
- Decision: `kernel file changes`
- Reason: kernel file changes

## Changed Paths

- `include/cutlass/gemm/collective/sm90_mma_array_tma_gmma_ss_warpspecialized_fp8_blockwise_scaling.hpp`

## Evidence Bundle

`evidence/pull-bundles/cutlass/gh-2965`
