---
id: pr-vllm-24248
repo: vllm-project/vllm
pr: 24248
title: '[PERF] Allreduce fusion. Support torch native matching. Tuning of the thresholds'
author: ilmarkov
date: '2025-11-10'
url: https://github.com/vllm-project/vllm/pull/24248
source_category: upstream-code
architectures:
- sm100
- sm90
tags:
- kernel-fusion
- moe
- pipeline-stages
techniques:
- kernel-fusion
- pipeline-stages
hardware_features: []
kernel_types:
- moe
languages:
- python
captured_at: '2026-04-27'
status: merged
merge_sha: d17ecc6b19b597615893be6c0eb61c9b4a9c9455
inclusion_reason: kernel file changes
changed_paths:
- .buildkite/test-pipeline.yaml
- benchmarks/kernels/benchmark_fused_collective.py
- tests/compile/test_fusions_e2e.py
- vllm/compilation/collective_fusion.py
- vllm/config/compilation.py
- vllm/model_executor/layers/fused_moe/layer.py
head_ref_oid: 0e453e4340fcfa000c272f2f8e2c57dc7f23abd2
artifact_dir: evidence/pull-bundles/vllm/gh-24248
---
# [PERF] Allreduce fusion. Support torch native matching. Tuning of the thresholds

- Repository: `vllm-project/vllm`
- PR: [24248](https://github.com/vllm-project/vllm/pull/24248)
- Decision: `kernel file changes`
- Reason: kernel file changes

## Changed Paths

- `.buildkite/test-pipeline.yaml`
- `benchmarks/kernels/benchmark_fused_collective.py`
- `tests/compile/test_fusions_e2e.py`
- `vllm/compilation/collective_fusion.py`
- `vllm/config/compilation.py`
- `vllm/model_executor/layers/fused_moe/layer.py`

## Evidence Bundle

`evidence/pull-bundles/vllm/gh-24248`
