---
id: pr-vllm-23439
repo: vllm-project/vllm
pr: 23439
title: '[Perf] Warmup FlashInfer attention during startup'
author: mgoin
date: '2025-09-10'
url: https://github.com/vllm-project/vllm/pull/23439
source_category: upstream-code
architectures:
- sm100
tags:
- attention
techniques: []
hardware_features: []
kernel_types:
- attention
languages:
- python
captured_at: '2026-04-27'
status: merged
merge_sha: fba785658170e8723ccba762654f30c54b0217a4
inclusion_reason: kernel file changes
changed_paths:
- vllm/model_executor/warmup/kernel_warmup.py
- vllm/v1/attention/backends/flashinfer.py
- vllm/v1/worker/gpu_model_runner.py
head_ref_oid: eabdc617c0b3ec1585090504f53e1cd10d5bc40c
artifact_dir: evidence/pull-bundles/vllm/gh-23439
---
# [Perf] Warmup FlashInfer attention during startup

- Repository: `vllm-project/vllm`
- PR: [23439](https://github.com/vllm-project/vllm/pull/23439)
- Decision: `kernel file changes`
- Reason: kernel file changes

## Changed Paths

- `vllm/model_executor/warmup/kernel_warmup.py`
- `vllm/v1/attention/backends/flashinfer.py`
- `vllm/v1/worker/gpu_model_runner.py`

## Evidence Bundle

`evidence/pull-bundles/vllm/gh-23439`
