---
id: pr-sglang-9339
repo: sgl-project/sglang
pr: 9339
title: Support trtllm_allreduce_fusion in flashinfer for cuda<12.8
author: strgrb
date: '2025-08-20'
url: https://github.com/sgl-project/sglang/pull/9339
source_category: upstream-code
architectures:
- sm100
tags:
- kernel-fusion
techniques:
- kernel-fusion
hardware_features: []
kernel_types: []
languages:
- cuda-cpp
- python
captured_at: '2026-04-27'
status: merged
merge_sha: 88fbc31b50be3f2ef68bff42b39cbf4aa09ca8b3
inclusion_reason: semantic match with file changes
changed_paths:
- python/sglang/srt/layers/communicator.py
- python/sglang/srt/layers/flashinfer_comm_fusion.py
- python/sglang/srt/layers/layernorm.py
head_ref_oid: be8ed898420ec016c0ed05c6b6d7d7fc4ec9328f
artifact_dir: evidence/pull-bundles/sglang/gh-9339
---
# Support trtllm_allreduce_fusion in flashinfer for cuda<12.8

- Repository: `sgl-project/sglang`
- PR: [9339](https://github.com/sgl-project/sglang/pull/9339)
- Decision: `semantic match with file changes`
- Reason: semantic match with file changes

## Changed Paths

- `python/sglang/srt/layers/communicator.py`
- `python/sglang/srt/layers/flashinfer_comm_fusion.py`
- `python/sglang/srt/layers/layernorm.py`

## Evidence Bundle

`evidence/pull-bundles/sglang/gh-9339`
