---
id: pr-vllm-23647
repo: vllm-project/vllm
pr: 23647
title: '[Flashinfer] Support Flashinfer TRTLLM FP8-qkv BF16/FP16-out Attention Kernel'
author: elvischenv
date: '2025-09-09'
url: https://github.com/vllm-project/vllm/pull/23647
source_category: upstream-code
architectures:
- sm100
tags:
- attention
- decode
- fp8
- kernel-fusion
- prefill
techniques:
- kernel-fusion
hardware_features:
- fp8
kernel_types:
- attention
- decode
- prefill
languages:
- python
captured_at: '2026-04-27'
status: merged
merge_sha: bba1042c6fcb01a3ec12803ab979852040d3e4d6
inclusion_reason: kernel file changes
changed_paths:
- benchmarks/kernels/benchmark_trtllm_decode_attention.py
- benchmarks/kernels/benchmark_trtllm_prefill_attention.py
- tests/kernels/attention/test_flashinfer_trtllm_attention.py
- vllm/compilation/fusion_attn.py
- vllm/v1/attention/backends/flashinfer.py
head_ref_oid: c9275566a6a60b3a5dc2792baabeebb17b6cb282
artifact_dir: evidence/pull-bundles/vllm/gh-23647
---
# [Flashinfer] Support Flashinfer TRTLLM FP8-qkv BF16/FP16-out Attention Kernel

- Repository: `vllm-project/vllm`
- PR: [23647](https://github.com/vllm-project/vllm/pull/23647)
- Decision: `kernel file changes`
- Reason: kernel file changes

## Changed Paths

- `benchmarks/kernels/benchmark_trtllm_decode_attention.py`
- `benchmarks/kernels/benchmark_trtllm_prefill_attention.py`
- `tests/kernels/attention/test_flashinfer_trtllm_attention.py`
- `vllm/compilation/fusion_attn.py`
- `vllm/v1/attention/backends/flashinfer.py`

## Evidence Bundle

`evidence/pull-bundles/vllm/gh-23647`
