---
id: pr-flashinfer-1106
repo: flashinfer-ai/flashinfer
pr: 1106
title: 'bugfix: host-precomuted plan function for blackwell fmha'
author: yzh119
date: '2025-06-03'
url: https://github.com/flashinfer-ai/flashinfer/pull/1106
source_category: upstream-code
architectures:
- sm100
tags:
- attention
- epilogue-fusion
- flash-attention
- gemm
- kernel-fusion
- prefill
- tile-scheduling
- tma
techniques:
- epilogue-fusion
- kernel-fusion
- tile-scheduling
hardware_features:
- tma
kernel_types:
- attention
- flash-attention
- gemm
- prefill
languages:
- cuda-cpp
captured_at: '2026-04-17'
status: merged
merge_sha: 59e536eb075d1aa02f53455628ae533843dc4c04
inclusion_reason: kernel file changes
changed_paths:
- benchmarks/bench_blackwell_attention.py
- csrc/blackwell_fmha_plan.cu
- csrc/fmha_cutlass_sm100.cu
- csrc/fmha_cutlass_sm100_pybind.cu
- csrc/gemm_groupwise_sm100.cu
- flashinfer/jit/attention/pytorch.py
- flashinfer/prefill.py
- flashinfer/utils.py
- include/flashinfer/attention/blackwell/collective/fmha_fusion.hpp
- include/flashinfer/attention/blackwell/collective/sm100_fmha_fwd_epilogue_tma_warpspecialized.hpp
- include/flashinfer/attention/blackwell/device/fmha.hpp
- include/flashinfer/attention/blackwell/fmha_cutlass_sm100.cuh
- include/flashinfer/attention/blackwell/kernel/fmha_tile_scheduler.hpp
- include/flashinfer/attention/blackwell/kernel/sm100_fmha_fwd_kernel_tma_warpspecialized.hpp
- include/flashinfer/attention/blackwell/plan.cuh
- tests/test_blackwell_fmha.py
head_ref_oid: ad7b74457571893e415d0b22cd58ec79814f746e
artifact_dir: evidence/pull-bundles/flashinfer/gh-1106
---
# bugfix: host-precomuted plan function for blackwell fmha

- Repository: `flashinfer-ai/flashinfer`
- PR: [1106](https://github.com/flashinfer-ai/flashinfer/pull/1106)
- Decision: `kernel file changes`
- Reason: kernel file changes

## Changed Paths

- `benchmarks/bench_blackwell_attention.py`
- `csrc/blackwell_fmha_plan.cu`
- `csrc/fmha_cutlass_sm100.cu`
- `csrc/fmha_cutlass_sm100_pybind.cu`
- `csrc/gemm_groupwise_sm100.cu`
- `flashinfer/jit/attention/pytorch.py`
- `flashinfer/prefill.py`
- `flashinfer/utils.py`
- `include/flashinfer/attention/blackwell/collective/fmha_fusion.hpp`
- `include/flashinfer/attention/blackwell/collective/sm100_fmha_fwd_epilogue_tma_warpspecialized.hpp`
- `include/flashinfer/attention/blackwell/device/fmha.hpp`
- `include/flashinfer/attention/blackwell/fmha_cutlass_sm100.cuh`
- `include/flashinfer/attention/blackwell/kernel/fmha_tile_scheduler.hpp`
- `include/flashinfer/attention/blackwell/kernel/sm100_fmha_fwd_kernel_tma_warpspecialized.hpp`
- `include/flashinfer/attention/blackwell/plan.cuh`
- `tests/test_blackwell_fmha.py`

## Evidence Bundle

`evidence/pull-bundles/flashinfer/gh-1106`
