---
id: pr-cccl-cub-7844
repo: NVIDIA/cccl
pr: 7844
title: Implement the new tuning API for `DispatchSegmentedRadixSort`
author: bernhardmgruber
date: '2026-03-02'
url: https://github.com/NVIDIA/cccl/pull/7844
source_category: upstream-code
architectures:
- sm100
tags:
- benchmark_test
- memory_primitives
- policy tuning
- radix sort
- scheduler_autotune
techniques:
- autotuning
- tile-scheduling
hardware_features: []
kernel_types:
- memory
- scheduler
- sort
languages:
- cuda-cpp
captured_at: '2026-05-16'
status: merged
merge_sha: 20b92ee57162dbaea73eaf5d7a552389603981b8
inclusion_reason: 'Transfer primitive policy carefully: coalescing, shared-memory staging, partial tiles, and determinism are part of the contract.'
changed_paths:
- cub/benchmarks/bench/segmented_radix_sort/keys.cu
- cub/cub/device/device_segmented_radix_sort.cuh
- cub/cub/device/dispatch/dispatch_radix_sort.cuh
- cub/cub/device/dispatch/dispatch_segmented_radix_sort.cuh
- cub/cub/device/dispatch/kernels/kernel_segmented_radix_sort.cuh
- cub/cub/device/dispatch/tuning/tuning_radix_sort.cuh
artifact_dir: evidence/pull-bundles/cccl-cub/gh-7844
head_ref_oid: 6ea8770f1831108cfa0fbbb372031848fd072391
---
# Implement the new tuning API for `DispatchSegmentedRadixSort`

- Repository: `NVIDIA/cccl`
- PR: [7844](https://github.com/NVIDIA/cccl/pull/7844)
- 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/segmented_radix_sort/keys.cu`
- `cub/cub/device/device_segmented_radix_sort.cuh`
- `cub/cub/device/dispatch/dispatch_radix_sort.cuh`
- `cub/cub/device/dispatch/dispatch_segmented_radix_sort.cuh`
- `cub/cub/device/dispatch/kernels/kernel_segmented_radix_sort.cuh`
- `cub/cub/device/dispatch/tuning/tuning_radix_sort.cuh`

## Evidence Bundle

`evidence/pull-bundles/cccl-cub/gh-7844`
