---
id: pr-vllm-28687
repo: vllm-project/vllm
pr: 28687
title: '[Performance] Reduce DeepGEMM N dim restriction from 128 to 64 multiplier '
author: alexm-redhat
date: '2025-11-19'
url: https://github.com/vllm-project/vllm/pull/28687
source_category: upstream-code
architectures:
- sm100
tags:
- fp8
- gemm
- pipeline-stages
- quantization
techniques:
- pipeline-stages
hardware_features:
- fp8
kernel_types:
- gemm
- quantization
languages:
- python
captured_at: '2026-04-27'
status: merged
merge_sha: 3aaa94ac99f4b295ba95f14b4968620b2127044f
inclusion_reason: kernel file changes
changed_paths:
- .buildkite/test-pipeline.yaml
- tests/kernels/quantization/test_block_fp8.py
- vllm/utils/deep_gemm.py
head_ref_oid: 47abf0e29a1ea4e2b7334cebb3a2f6c4b1176606
artifact_dir: evidence/pull-bundles/vllm/gh-28687
---
# [Performance] Reduce DeepGEMM N dim restriction from 128 to 64 multiplier 

- Repository: `vllm-project/vllm`
- PR: [28687](https://github.com/vllm-project/vllm/pull/28687)
- Decision: `kernel file changes`
- Reason: kernel file changes

## Changed Paths

- `.buildkite/test-pipeline.yaml`
- `tests/kernels/quantization/test_block_fp8.py`
- `vllm/utils/deep_gemm.py`

## Evidence Bundle

`evidence/pull-bundles/vllm/gh-28687`
