---
id: pr-cccl-cub-3543
repo: NVIDIA/cccl
pr: 3543
title: Tune cub::DeviceTransform for Blackwell
author: bernhardmgruber
date: '2025-01-28'
url: https://github.com/NVIDIA/cccl/pull/3543
source_category: upstream-code
architectures:
- sm100
tags:
- blackwell
techniques: []
hardware_features:
- blackwell
kernel_types: []
languages: []
captured_at: '2026-05-16'
status: merged
merge_sha: eaf30516fd82ccc2848a36bb57f54402e90e5d25
inclusion_reason: Search-matched CUDA kernel optimization PR; materialize diff/source before synthesis.
changed_paths:
- cub/cub/device/dispatch/tuning/tuning_transform.cuh
artifact_dir: evidence/pull-bundles/cccl-cub/gh-3543
head_ref_oid: c0588b1b4974198dfa98d8491233d83fdff6b6f4
---
# Tune cub::DeviceTransform for Blackwell

- Repository: `NVIDIA/cccl`
- PR: [3543](https://github.com/NVIDIA/cccl/pull/3543)
- 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_transform.cuh`

## Evidence Bundle

`evidence/pull-bundles/cccl-cub/gh-3543`
