---
id: pr-flashinfer-2996
repo: flashinfer-ai/flashinfer
pr: 2996
title: 'fix: tinygemm2 hang issue due to barrier sync'
author: jimmyzho
date: '2026-04-07'
url: https://github.com/flashinfer-ai/flashinfer/pull/2996
source_category: upstream-code
architectures:
- sm100
tags:
- gemm
techniques: []
hardware_features: []
kernel_types:
- gemm
languages:
- cuda-cpp
captured_at: '2026-04-27'
status: merged
merge_sha: 479f67e74493d2c217a2b2ba32cebc28d48bb06e
inclusion_reason: kernel file changes
changed_paths:
- csrc/tinygemm2.cu
- flashinfer/gemm/routergemm.py
- tests/model_optimizations/test_tinygemm2.py
head_ref_oid: 5ccd2fe838943114262ccce193587d319f9630b7
artifact_dir: evidence/pull-bundles/flashinfer/gh-2996
---
# fix: tinygemm2 hang issue due to barrier sync

- Repository: `flashinfer-ai/flashinfer`
- PR: [2996](https://github.com/flashinfer-ai/flashinfer/pull/2996)
- Decision: `kernel file changes`
- Reason: kernel file changes

## Changed Paths

- `csrc/tinygemm2.cu`
- `flashinfer/gemm/routergemm.py`
- `tests/model_optimizations/test_tinygemm2.py`

## Evidence Bundle

`evidence/pull-bundles/flashinfer/gh-2996`
