---
id: pr-cccl-cub-3559
repo: NVIDIA/cccl
pr: 3559
title: Add b200 tunings for scan.exclusive.sum
author: bernhardmgruber
date: '2025-02-07'
url: https://github.com/NVIDIA/cccl/pull/3559
source_category: upstream-code
architectures:
- sm100
- sm90
tags:
- arch_pipeline
- benchmark_test
- memory_primitives
- scheduler_autotune
- sm100
- sm90
techniques:
- autotuning
- pipeline-stages
- tile-scheduling
hardware_features:
- blackwell
- hopper
kernel_types:
- memory
- runtime
- scan
- scheduler
languages:
- cuda-cpp
captured_at: '2026-05-16'
status: merged
merge_sha: 25523da2f942a045facfe2ec6839f448c60c2c4e
inclusion_reason: 'Transfer primitive policy carefully: coalescing, shared-memory staging, partial tiles, and determinism are part of the contract.'
changed_paths:
- cub/benchmarks/bench/scan/exclusive/base.cuh
- cub/cub/device/device_scan.cuh
- cub/cub/device/dispatch/dispatch_scan.cuh
- cub/cub/device/dispatch/tuning/tuning_scan.cuh
- thrust/testing/scan.cu
- thrust/thrust/system/cuda/detail/async/inclusive_scan.h
- thrust/thrust/system/cuda/detail/scan.h
artifact_dir: evidence/pull-bundles/cccl-cub/gh-3559
head_ref_oid: d52cf580b3c00b25c933c0178266a71e60acb745
---
# Add b200 tunings for scan.exclusive.sum

- Repository: `NVIDIA/cccl`
- PR: [3559](https://github.com/NVIDIA/cccl/pull/3559)
- 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/scan/exclusive/base.cuh`
- `cub/cub/device/device_scan.cuh`
- `cub/cub/device/dispatch/dispatch_scan.cuh`
- `cub/cub/device/dispatch/tuning/tuning_scan.cuh`
- `thrust/testing/scan.cu`
- `thrust/thrust/system/cuda/detail/async/inclusive_scan.h`
- `thrust/thrust/system/cuda/detail/scan.h`

## Evidence Bundle

`evidence/pull-bundles/cccl-cub/gh-3559`
