---
id: pr-vllm-20911
repo: vllm-project/vllm
pr: 20911
title: '[Perf] Add swap_ab to SM90 FP8 non-block CUTLASS moe grouped gemm'
author: shixianc
date: '2025-07-18'
url: https://github.com/vllm-project/vllm/pull/20911
source_category: upstream-code
architectures:
- sm100
- sm90
tags:
- fp8
- gemm
- moe
- quantization
techniques: []
hardware_features:
- fp8
kernel_types:
- gemm
- moe
- quantization
languages:
- cuda-cpp
captured_at: '2026-04-27'
status: merged
merge_sha: 5780121c95bcba6c3abf45d1a7f3a33b2cb70c23
inclusion_reason: kernel file changes
changed_paths:
- csrc/quantization/cutlass_w8a8/moe/grouped_mm_c3x.cu
- csrc/quantization/cutlass_w8a8/moe/grouped_mm_c3x.cuh
- csrc/quantization/cutlass_w8a8/moe/moe_data.cu
- tests/kernels/moe/test_cutlass_moe.py
head_ref_oid: 0082ed82a057db0a48d625861d71fa212c9fe43d
artifact_dir: evidence/pull-bundles/vllm/gh-20911
---
# [Perf] Add swap_ab to SM90 FP8 non-block CUTLASS moe grouped gemm

- Repository: `vllm-project/vllm`
- PR: [20911](https://github.com/vllm-project/vllm/pull/20911)
- Decision: `kernel file changes`
- Reason: kernel file changes

## Changed Paths

- `csrc/quantization/cutlass_w8a8/moe/grouped_mm_c3x.cu`
- `csrc/quantization/cutlass_w8a8/moe/grouped_mm_c3x.cuh`
- `csrc/quantization/cutlass_w8a8/moe/moe_data.cu`
- `tests/kernels/moe/test_cutlass_moe.py`

## Evidence Bundle

`evidence/pull-bundles/vllm/gh-20911`
