---
id: pr-vllm-13198
repo: vllm-project/vllm
pr: 13198
title: '[Kernel][Bugfix] Refactor and Fix CUTLASS 2:4 Sparse Kernels'
author: tlrmchlsmth
date: '2025-02-14'
url: https://github.com/vllm-project/vllm/pull/13198
source_category: upstream-code
architectures:
- sm100
tags: []
techniques: []
hardware_features: []
kernel_types: []
languages: []
captured_at: '2026-05-16'
status: merged
merge_sha: c1e37bf71b99f3c8cb4923c0b620918a93170206
inclusion_reason: defer
changed_paths:
- CMakeLists.txt
- csrc/cutlass_extensions/epilogue/scaled_mm_epilogues_c3x.hpp
- csrc/ops.h
- csrc/quantization/cutlass_w8a8/c3x/scaled_mm.cuh
- csrc/quantization/cutlass_w8a8/scaled_mm_c2x.cuh
- csrc/sparse/cutlass/sparse_compressor_c3x.cu
- csrc/sparse/cutlass/sparse_compressor_c3x.cuh
- csrc/sparse/cutlass/sparse_compressor_entry.cu
- csrc/sparse/cutlass/sparse_scaled_mm_c3x.cu
- csrc/sparse/cutlass/sparse_scaled_mm_c3x.cuh
- csrc/sparse/cutlass/sparse_scaled_mm_entry.cu
- csrc/torch_bindings.cpp
- tests/kernels/test_cutlass_2of4_sparse.py
- vllm/_custom_ops.py
- vllm/model_executor/layers/quantization/compressed_tensors/compressed_tensors.py
- vllm/model_executor/layers/quantization/compressed_tensors/schemes/compressed_tensors_24.py
artifact_dir: evidence/pull-bundles/vllm/gh-13198
head_ref_oid: db81af8fa4518d2160e0556d6cf0cebd500f81b7
---
# [Kernel][Bugfix] Refactor and Fix CUTLASS 2:4 Sparse Kernels

- Repository: `vllm-project/vllm`
- PR: [13198](https://github.com/vllm-project/vllm/pull/13198)
- Decision: `defer`
- Reason: defer

## Changed Paths

- `CMakeLists.txt`
- `csrc/cutlass_extensions/epilogue/scaled_mm_epilogues_c3x.hpp`
- `csrc/ops.h`
- `csrc/quantization/cutlass_w8a8/c3x/scaled_mm.cuh`
- `csrc/quantization/cutlass_w8a8/scaled_mm_c2x.cuh`
- `csrc/sparse/cutlass/sparse_compressor_c3x.cu`
- `csrc/sparse/cutlass/sparse_compressor_c3x.cuh`
- `csrc/sparse/cutlass/sparse_compressor_entry.cu`
- `csrc/sparse/cutlass/sparse_scaled_mm_c3x.cu`
- `csrc/sparse/cutlass/sparse_scaled_mm_c3x.cuh`
- `csrc/sparse/cutlass/sparse_scaled_mm_entry.cu`
- `csrc/torch_bindings.cpp`
- `tests/kernels/test_cutlass_2of4_sparse.py`
- `vllm/_custom_ops.py`
- `vllm/model_executor/layers/quantization/compressed_tensors/compressed_tensors.py`
- `vllm/model_executor/layers/quantization/compressed_tensors/schemes/compressed_tensors_24.py`

## Evidence Bundle

`evidence/pull-bundles/vllm/gh-13198`
