---
id: pr-cccl-cub-6846
repo: NVIDIA/cccl
pr: 6846
title: '[cuda.coop]: add device-side `coop.warp.sum` benchmark with pynvbench'
author: NaderAlAwar
date: '2026-02-03'
url: https://github.com/NVIDIA/cccl/pull/6846
source_category: upstream-code
architectures:
- sm100
tags:
- benchmark kernel
techniques:
- warp-specialization
hardware_features: []
kernel_types: []
languages:
- cuda-cpp
captured_at: '2026-05-16'
status: merged
merge_sha: b0e31359eb99cc338b1d9c8ce8fe1fdf043ae4ac
inclusion_reason: Search-matched CUDA kernel optimization PR; materialize diff/source before synthesis.
changed_paths:
- python/cuda_cccl/benchmarks/coop/README.md
- python/cuda_cccl/benchmarks/coop/bench_warp_reduce.py
- python/cuda_cccl/benchmarks/coop/device_side_benchmark.py
- python/cuda_cccl/pyproject.toml
artifact_dir: evidence/pull-bundles/cccl-cub/gh-6846
head_ref_oid: dc95e94b69c8a6a1b1fd162f6a76a6029665ced4
---
# [cuda.coop]: add device-side `coop.warp.sum` benchmark with pynvbench

- Repository: `NVIDIA/cccl`
- PR: [6846](https://github.com/NVIDIA/cccl/pull/6846)
- 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

- `python/cuda_cccl/benchmarks/coop/README.md`
- `python/cuda_cccl/benchmarks/coop/bench_warp_reduce.py`
- `python/cuda_cccl/benchmarks/coop/device_side_benchmark.py`
- `python/cuda_cccl/pyproject.toml`

## Evidence Bundle

`evidence/pull-bundles/cccl-cub/gh-6846`
