---
id: pr-cccl-cub-7949
repo: NVIDIA/cccl
pr: 7949
title: Use the new tuning API for `detail::radix_sort::dispatch`
author: bernhardmgruber
date: '2026-05-14'
url: https://github.com/NVIDIA/cccl/pull/7949
source_category: upstream-code
architectures:
- sm100
tags:
- benchmark
- benchmark_test
- memory_primitives
- policy tuning
- radix sort
techniques: []
hardware_features: []
kernel_types:
- memory
- sort
languages:
- cuda-cpp
captured_at: '2026-05-16'
status: merged
merge_sha: f03d3504a371ebb0ae5ac01e757075daaf583cd3
inclusion_reason: 'Transfer primitive policy carefully: coalescing, shared-memory staging, partial tiles, and determinism are part of the contract.'
changed_paths:
- cub/benchmarks/bench/radix_sort/keys.cu
- cub/benchmarks/bench/radix_sort/pairs.cu
- cub/benchmarks/bench/radix_sort/policy_selector.h
- cub/cub/device/device_radix_sort.cuh
- cub/test/catch2_test_device_radix_sort_env.cu
artifact_dir: evidence/pull-bundles/cccl-cub/gh-7949
head_ref_oid: fe72f1e955e7fcc1f9e680cc45a46640e83828bc
---
# Use the new tuning API for `detail::radix_sort::dispatch`

- Repository: `NVIDIA/cccl`
- PR: [7949](https://github.com/NVIDIA/cccl/pull/7949)
- Decision: `Transfer primitive policy carefully: coalescing, shared-memory staging, partial tiles, and determinism are part of the contract.`
- Reason: Transfer primitive policy carefully: coalescing, shared-memory staging, partial tiles, and determinism are part of the contract.

## Changed Paths

- `cub/benchmarks/bench/radix_sort/keys.cu`
- `cub/benchmarks/bench/radix_sort/pairs.cu`
- `cub/benchmarks/bench/radix_sort/policy_selector.h`
- `cub/cub/device/device_radix_sort.cuh`
- `cub/test/catch2_test_device_radix_sort_env.cu`

## Evidence Bundle

`evidence/pull-bundles/cccl-cub/gh-7949`
