---
id: pr-flashinfer-1131
repo: flashinfer-ai/flashinfer
pr: 1131
title: 'feat: add trtllm all-reduce fusion'
author: yyihuang
date: '2025-06-19'
url: https://github.com/flashinfer-ai/flashinfer/pull/1131
source_category: upstream-code
architectures:
- sm100
tags:
- kernel-fusion
- moe
techniques:
- kernel-fusion
hardware_features: []
kernel_types:
- moe
languages:
- cuda-cpp
captured_at: '2026-04-17'
status: merged
merge_sha: 28d0843e2d9d8b674b1441e9188119f231c9a272
inclusion_reason: kernel file changes
changed_paths:
- csrc/trtllm_allreduce_fusion.cu
- flashinfer/comm.py
- include/flashinfer/comm/trtllm_allreduce.cuh
- include/flashinfer/comm/trtllm_allreduce_fusion.cuh
- tests/test_trtllm_allreduce_fusion.py
- tests/test_trtllm_moe_allreduce_fusion.py
head_ref_oid: 32c6defe5bf297f6dc402ed1981c2e2ff68a8af6
artifact_dir: evidence/pull-bundles/flashinfer/gh-1131
---
# feat: add trtllm all-reduce fusion

- Repository: `flashinfer-ai/flashinfer`
- PR: [1131](https://github.com/flashinfer-ai/flashinfer/pull/1131)
- Decision: `kernel file changes`
- Reason: kernel file changes

## Changed Paths

- `csrc/trtllm_allreduce_fusion.cu`
- `flashinfer/comm.py`
- `include/flashinfer/comm/trtllm_allreduce.cuh`
- `include/flashinfer/comm/trtllm_allreduce_fusion.cuh`
- `tests/test_trtllm_allreduce_fusion.py`
- `tests/test_trtllm_moe_allreduce_fusion.py`

## Evidence Bundle

`evidence/pull-bundles/flashinfer/gh-1131`
