---
id: pr-cccl-cub-8331
repo: NVIDIA/cccl
pr: 8331
title: Refactor radix rank sort operations
author: bernhardmgruber
date: '2026-04-09'
url: https://github.com/NVIDIA/cccl/pull/8331
source_category: upstream-code
architectures:
- sm100
tags:
- sort
techniques: []
hardware_features: []
kernel_types:
- sort
languages: []
captured_at: '2026-05-16'
status: merged
merge_sha: b0600ca75a73786afd1819d3969c10631a778fbc
inclusion_reason: Search-matched CUDA kernel optimization PR; materialize diff/source before synthesis.
changed_paths:
- cub/cub/agent/agent_topk.cuh
- cub/cub/block/radix_rank_sort_operations.cuh
- cub/cub/device/device_radix_sort.cuh
- cub/cub/device/device_topk.cuh
- cub/cub/device/dispatch/dispatch_topk.cuh
artifact_dir: evidence/pull-bundles/cccl-cub/gh-8331
head_ref_oid: 14febc70e00ad1b65666130242508fc5ebb354f8
---
# Refactor radix rank sort operations

- Repository: `NVIDIA/cccl`
- PR: [8331](https://github.com/NVIDIA/cccl/pull/8331)
- 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/agent/agent_topk.cuh`
- `cub/cub/block/radix_rank_sort_operations.cuh`
- `cub/cub/device/device_radix_sort.cuh`
- `cub/cub/device/device_topk.cuh`
- `cub/cub/device/dispatch/dispatch_topk.cuh`

## Evidence Bundle

`evidence/pull-bundles/cccl-cub/gh-8331`
