---
id: pr-cccl-cub-7861
repo: NVIDIA/cccl
pr: 7861
title: Improve warpspeed scan tuning for sm120
author: bernhardmgruber
date: '2026-03-12'
url: https://github.com/NVIDIA/cccl/pull/7861
source_category: upstream-code
architectures:
- sm100
tags:
- blackwell
techniques:
- warp-specialization
hardware_features:
- blackwell
kernel_types:
- scan
languages: []
captured_at: '2026-05-16'
status: merged
merge_sha: c50616d8aaac51c39dd02f569e2be3b0924c735d
inclusion_reason: Search-matched CUDA kernel optimization PR; materialize diff/source before synthesis.
changed_paths:
- cub/cub/device/dispatch/tuning/tuning_scan.cuh
artifact_dir: evidence/pull-bundles/cccl-cub/gh-7861
head_ref_oid: a9c8c671718774eea71e950aac57958ab44fb38b
---
# Improve warpspeed scan tuning for sm120

- Repository: `NVIDIA/cccl`
- PR: [7861](https://github.com/NVIDIA/cccl/pull/7861)
- 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

- `cub/cub/device/dispatch/tuning/tuning_scan.cuh`

## Evidence Bundle

`evidence/pull-bundles/cccl-cub/gh-7861`
