---
id: pr-cccl-cub-3691
repo: NVIDIA/cccl
pr: 3691
title: Fix SM100 histogram tunings
author: bernhardmgruber
date: '2025-02-06'
url: https://github.com/NVIDIA/cccl/pull/3691
source_category: upstream-code
architectures:
- sm100
tags:
- arch_pipeline
- memory_primitives
- scheduler_autotune
- sm100
techniques:
- autotuning
- pipeline-stages
- tile-scheduling
hardware_features:
- blackwell
kernel_types:
- memory
- runtime
- scheduler
- sort
languages:
- cuda-cpp
captured_at: '2026-05-16'
status: merged
merge_sha: e7aae03124f20d8a4783d3e1668307d4a9e3bb8b
inclusion_reason: Treat scheduler/autotune configs as shape-specific evidence; replay benchmark shapes before generalizing.
changed_paths:
- cub/cub/device/dispatch/tuning/tuning_histogram.cuh
artifact_dir: evidence/pull-bundles/cccl-cub/gh-3691
head_ref_oid: 30f5b218ae7c69ef7d949be641b9243509553d8b
---
# Fix SM100 histogram tunings

- Repository: `NVIDIA/cccl`
- PR: [3691](https://github.com/NVIDIA/cccl/pull/3691)
- Decision: `Treat scheduler/autotune configs as shape-specific evidence; replay benchmark shapes before generalizing.`
- Reason: Treat scheduler/autotune configs as shape-specific evidence; replay benchmark shapes before generalizing.

## Changed Paths

- `cub/cub/device/dispatch/tuning/tuning_histogram.cuh`

## Evidence Bundle

`evidence/pull-bundles/cccl-cub/gh-3691`
