---
id: pr-cccl-cub-8861
repo: NVIDIA/cccl
pr: 8861
title: '[cub] Simplify arch dispatch'
author: davebayer
date: '2026-05-07'
url: https://github.com/NVIDIA/cccl/pull/8861
source_category: upstream-code
architectures:
- sm100
tags:
- CUB
- benchmark_test
- memory_primitives
techniques: []
hardware_features: []
kernel_types:
- memory
languages:
- cuda-cpp
captured_at: '2026-05-16'
status: merged
merge_sha: bdded3684b57a6eef2e9e6bd4f1fc828d1bc8230
inclusion_reason: 'Transfer primitive policy carefully: coalescing, shared-memory staging, partial tiles, and determinism are part of the contract.'
changed_paths:
- cub/cub/detail/arch_dispatch.cuh
- cub/test/catch2_test_arch_dispatch.cu
- libcudacxx/test/libcudacxx/cuda/ccclrt/device/target_compute_capabilities.pass.cpp
artifact_dir: evidence/pull-bundles/cccl-cub/gh-8861
head_ref_oid: df70ad7f9c0c5b8d53985cc14108d19ad560ca5b
---
# [cub] Simplify arch dispatch

- Repository: `NVIDIA/cccl`
- PR: [8861](https://github.com/NVIDIA/cccl/pull/8861)
- 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/cub/detail/arch_dispatch.cuh`
- `cub/test/catch2_test_arch_dispatch.cu`
- `libcudacxx/test/libcudacxx/cuda/ccclrt/device/target_compute_capabilities.pass.cpp`

## Evidence Bundle

`evidence/pull-bundles/cccl-cub/gh-8861`
