---
id: pr-thunderkittens-152
repo: HazyResearch/ThunderKittens
pr: 152
title: Educational Hopper Matmul level_07 Warp Specialization Fix
author: tspeterkim
date: '2025-11-04'
url: https://github.com/HazyResearch/ThunderKittens/pull/152
source_category: upstream-code
architectures:
- sm90
tags:
- hopper
- matmul
- warpgroup
techniques:
- warp-specialization
hardware_features:
- hopper
kernel_types:
- gemm
languages: []
captured_at: '2026-05-16'
status: merged
merge_sha: d0914e9fe3773aeff75b0f494c13231c2e34ee4a
inclusion_reason: Search-matched CUDA kernel optimization PR; materialize diff/source before synthesis.
changed_paths:
- kernels/matmul/educational/level_07.cu
artifact_dir: evidence/pull-bundles/thunderkittens/gh-152
head_ref_oid: e13faa01a32aab903b95cebfc96af838b1a1ae43
---
# Educational Hopper Matmul level_07 Warp Specialization Fix

- Repository: `HazyResearch/ThunderKittens`
- PR: [152](https://github.com/HazyResearch/ThunderKittens/pull/152)
- Decision: `Search-matched CUDA kernel optimization PR; materialize diff/source before synthesis.`
- Reason: Search-matched CUDA kernel optimization PR; materialize diff/source before synthesis.

## Changed Paths

- `kernels/matmul/educational/level_07.cu`

## Evidence Bundle

`evidence/pull-bundles/thunderkittens/gh-152`
