---
id: pr-flashinfer-1255
repo: flashinfer-ai/flashinfer
pr: 1255
title: TRT-LLM's Multi-Node NVLink AR + fused RMSNorm kernel
author: nvmbreughe
date: '2025-07-15'
url: https://github.com/flashinfer-ai/flashinfer/pull/1255
source_category: upstream-code
architectures:
- sm100
tags:
- kernel-fusion
techniques:
- kernel-fusion
hardware_features: []
kernel_types: []
languages:
- cuda-cpp
captured_at: '2026-04-17'
status: merged
merge_sha: 3f8317c67ac129facb8525b2fb581be42f634459
inclusion_reason: kernel file changes
changed_paths:
- csrc/trtllm_mnnvl_allreduce.cu
- flashinfer/comm/mnnvl.py
- flashinfer/comm/trtllm_mnnvl_ar.py
- include/flashinfer/comm/trtllm_mnnvl_allreduce.cuh
- tests/test_trtllm_mnnvl_allreduce.py
head_ref_oid: 7f7a6a051de89a11ccf223f743972b8393452074
artifact_dir: evidence/pull-bundles/flashinfer/gh-1255
---
# TRT-LLM's Multi-Node NVLink AR + fused RMSNorm kernel

- Repository: `flashinfer-ai/flashinfer`
- PR: [1255](https://github.com/flashinfer-ai/flashinfer/pull/1255)
- Decision: `kernel file changes`
- Reason: kernel file changes

## Changed Paths

- `csrc/trtllm_mnnvl_allreduce.cu`
- `flashinfer/comm/mnnvl.py`
- `flashinfer/comm/trtllm_mnnvl_ar.py`
- `include/flashinfer/comm/trtllm_mnnvl_allreduce.cuh`
- `tests/test_trtllm_mnnvl_allreduce.py`

## Evidence Bundle

`evidence/pull-bundles/flashinfer/gh-1255`
