---
id: pr-flashinfer-1089
repo: flashinfer-ai/flashinfer
pr: 1089
title: 'comm: refactor and initialize `flashinfer.comm` module'
author: yzh119
date: '2025-05-24'
url: https://github.com/flashinfer-ai/flashinfer/pull/1089
source_category: upstream-code
architectures:
- sm100
tags:
- gemm
techniques: []
hardware_features: []
kernel_types:
- gemm
languages:
- cuda-cpp
captured_at: '2026-04-17'
status: merged
merge_sha: 8daa44f309248dfb5beb081952ba067d2e7d0cf3
inclusion_reason: kernel file changes
changed_paths:
- .gitmodules
- 3rdparty/mscclpp
- CMakeLists.txt
- cmake/config.cmake
- csrc/custom_all_reduce.cu
- flashinfer/aot.py
- flashinfer/comm.py
- flashinfer/custom_all_reduce.py
- include/flashinfer/comm/custom_all_reduce.cuh
- include/flashinfer/distributed/all_reduce.cuh
- src/test_attn_all_reduce.cu
- src/test_sum_all_reduce.cu
- tests/test_custom_allreduce.py
head_ref_oid: cc1bd5a143aa74dcc2f00530da2958436657bfe7
artifact_dir: evidence/pull-bundles/flashinfer/gh-1089
---
# comm: refactor and initialize `flashinfer.comm` module

- Repository: `flashinfer-ai/flashinfer`
- PR: [1089](https://github.com/flashinfer-ai/flashinfer/pull/1089)
- Decision: `kernel file changes`
- Reason: kernel file changes

## Changed Paths

- `.gitmodules`
- `3rdparty/mscclpp`
- `CMakeLists.txt`
- `cmake/config.cmake`
- `csrc/custom_all_reduce.cu`
- `flashinfer/aot.py`
- `flashinfer/comm.py`
- `flashinfer/custom_all_reduce.py`
- `include/flashinfer/comm/custom_all_reduce.cuh`
- `include/flashinfer/distributed/all_reduce.cuh`
- `src/test_attn_all_reduce.cu`
- `src/test_sum_all_reduce.cu`
- `tests/test_custom_allreduce.py`

## Evidence Bundle

`evidence/pull-bundles/flashinfer/gh-1089`
