---
id: pr-cccl-cub-7814
repo: NVIDIA/cccl
pr: 7814
title: '[Backport branch/3.3.x] Forward policy hub from `dispatch_streaming_arg_reduce_t` to `reduce::dispatch`'
author: github-actions[bot]
date: '2026-02-27'
url: https://github.com/NVIDIA/cccl/pull/7814
source_category: upstream-code
architectures:
- sm100
tags:
- benchmark_test
- memory_primitives
- reduce
- scheduler_autotune
techniques:
- autotuning
- tile-scheduling
hardware_features: []
kernel_types:
- memory
- scheduler
languages:
- cuda-cpp
captured_at: '2026-05-16'
status: merged
merge_sha: 5f48d38a0314d2e6c6678b05da91a0fbc20c94f9
inclusion_reason: 'Transfer primitive policy carefully: coalescing, shared-memory staging, partial tiles, and determinism are part of the contract.'
changed_paths:
- cub/benchmarks/bench/reduce/arg_extrema.cu
- cub/cub/device/dispatch/dispatch_streaming_reduce.cuh
- cub/cub/device/dispatch/tuning/tuning_reduce.cuh
artifact_dir: evidence/pull-bundles/cccl-cub/gh-7814
head_ref_oid: 9d4a49e69f329e7bcce2d0fd70aedc23011c1993
---
# [Backport branch/3.3.x] Forward policy hub from `dispatch_streaming_arg_reduce_t` to `reduce::dispatch`

- Repository: `NVIDIA/cccl`
- PR: [7814](https://github.com/NVIDIA/cccl/pull/7814)
- 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/reduce/arg_extrema.cu`
- `cub/cub/device/dispatch/dispatch_streaming_reduce.cuh`
- `cub/cub/device/dispatch/tuning/tuning_reduce.cuh`

## Evidence Bundle

`evidence/pull-bundles/cccl-cub/gh-7814`
