---
id: pr-cccl-cub-5269
repo: NVIDIA/cccl
pr: 5269
title: Add sm90 tunings for RFA F32
author: srinivasyadav18
date: '2025-07-21'
url: https://github.com/NVIDIA/cccl/pull/5269
source_category: upstream-code
architectures:
- sm90
tags:
- sm90
techniques: []
hardware_features:
- hopper
kernel_types: []
languages: []
captured_at: '2026-05-16'
status: merged
merge_sha: 99b247b049add357380812511499ed6bda368ca8
inclusion_reason: Search-matched CUDA kernel optimization PR; materialize diff/source before synthesis.
changed_paths:
- cub/cub/device/dispatch/kernels/reduce.cuh
- cub/cub/device/dispatch/tuning/tuning_reduce.cuh
artifact_dir: evidence/pull-bundles/cccl-cub/gh-5269
head_ref_oid: 5655ce9465c0b50cc39b4dad09bd8c87830053ed
---
# Add sm90 tunings for RFA F32

- Repository: `NVIDIA/cccl`
- PR: [5269](https://github.com/NVIDIA/cccl/pull/5269)
- 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/kernels/reduce.cuh`
- `cub/cub/device/dispatch/tuning/tuning_reduce.cuh`

## Evidence Bundle

`evidence/pull-bundles/cccl-cub/gh-5269`
