---
id: pr-cccl-cub-7967
repo: NVIDIA/cccl
pr: 7967
title: Add environment overloads for `DeviceHistogram::*`
author: gonidelis
date: '2026-03-19'
url: https://github.com/NVIDIA/cccl/pull/7967
source_category: upstream-code
architectures:
- sm100
tags:
- reduction
techniques: []
hardware_features: []
kernel_types:
- reduction
languages: []
captured_at: '2026-05-16'
status: merged
merge_sha: b7ff3fe78b00b3f003cc1b9edefb5dabac12d91a
inclusion_reason: Search-matched CUDA kernel optimization PR; materialize diff/source before synthesis.
changed_paths:
- cub/cub/device/device_histogram.cuh
- cub/test/catch2_test_device_histogram_env.cu
- cub/test/catch2_test_device_histogram_env_api.cu
artifact_dir: evidence/pull-bundles/cccl-cub/gh-7967
head_ref_oid: dfc392ee5587d71d7b0e643049ccd4188233aa18
---
# Add environment overloads for `DeviceHistogram::*`

- Repository: `NVIDIA/cccl`
- PR: [7967](https://github.com/NVIDIA/cccl/pull/7967)
- Decision: `Search-matched CUDA kernel optimization PR; materialize diff/source before synthesis.`
- Reason: Search-matched CUDA kernel optimization PR; materialize diff/source before synthesis.

## Changed Paths

- `cub/cub/device/device_histogram.cuh`
- `cub/test/catch2_test_device_histogram_env.cu`
- `cub/test/catch2_test_device_histogram_env_api.cu`

## Evidence Bundle

`evidence/pull-bundles/cccl-cub/gh-7967`
