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Use native 8-bit PTX atomic loads and stores. - #10784

#10784

Merged

griwes merged 1 commit into

NVIDIA:mainNVIDIA/cccl:mainfrom

griwes:feature/atomic-native-8-bit-load-storegriwes/cccl:feature/atomic-native-8-bit-load-storeCopy head branch name to clipboard

Aug 13, 2026

Conversation Commits1 (1)Checks Files changed

Merged

Use native 8-bit PTX atomic loads and stores.#10784
griwes merged 1 commit into
NVIDIA:mainfrom
griwes:feature/atomic-native-8-bit-load-store

Use native 8-bit PTX atomic loads and stores.

237a9cf

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Build workflow from matrix

CCCL C CUDASTF nvcc GCC / A / [CTK13.3 GCC13] Build(amd64): sm{75}

CCCL C CUDASTF nvcc GCC / A / [CTK13.3 GCC13] Test(amd64, T4): sm{75}

CCCL C Parallel nvcc GCC / M / [CTK13.3 GCC13] Build(amd64): sm{75}

CCCL C Parallel nvcc GCC / M / [CTK13.3 GCC13] Test(amd64, RTX2080): sm{75}

CCCL C Parallel nvcc GCC / Y / [CTK13.3 GCC13] Build(amd64): sm{120}

CCCL C Parallel nvcc GCC / Y / [CTK13.3 GCC13] Test(amd64, RTXPRO6000): sm{120}

CUB nvcc GCC / BQ / [CTK13.3 GCC15 C++20] BuildHostLaunch(amd64): sm{86}

CUB nvcc GCC / BQ / [CTK13.3 GCC15 C++20] HostLaunch(amd64, RTXA6000): sm{86}

CUB nvcc GCC / Bc / [CTK13.3 GCC15 C++20] BuildNoLaunch(amd64): sm{86}

CUB nvcc GCC / Bc / [CTK13.3 GCC15 C++20] TestNoLaunch(amd64, RTXA6000): sm{86}

cudax nvcc GCC / B8 / [CTK13.3 GCC15 C++20] Build(amd64): sm{75}

cudax nvcc GCC / B8 / [CTK13.3 GCC15 C++20] Test(amd64, RTX2080): sm{75}

libcu++ nvcc Clang / Do / [CTK13.3 Clang21 C++20] Build(amd64)

libcu++ nvcc Clang / Do / [CTK13.3 Clang21 C++20] Test(amd64, T4)

libcu++ nvcc GCC / FE / [CTK13.3 GCC15 C++20] Build(amd64)

libcu++ nvcc GCC / FE / [CTK13.3 GCC15 C++20] Test(amd64, T4)

libcu++ nvcc GCC / FE / [CTK13.3 GCC15 C++20] Test(amd64, H100)

libcu++ nvcc GCC / FU / [CTK13.3 GCC15 C++20] Build(amd64): sm{90}

libcu++ nvcc GCC / FU / [CTK13.3 GCC15 C++20] Test(amd64, H100 2-GPU): sm{90}

Python (cuda.compute on v2/HostJIT) nvcc GCC / Gk / [CTK12.9 GCC13 py3.14] Build cuda.cccl(amd64)

Python (cuda.compute on v2/HostJIT) nvcc GCC / Gk / [CTK13.3 GCC13 py3.14] Test cuda.compute(amd64, L4)

Python (cuda.compute on v2/HostJIT) nvcc GCC / Gk / [CTK13.3 GCC13 py3.14] Test cuda.cccl.examples(amd64, L4)

Python nvcc GCC / G0 / [CTK12.9 GCC13 py3.14] Build cuda.cccl(amd64)

Python nvcc GCC / G0 / [CTK13.3 GCC13 py3.14] Test cuda.compute(amd64, L4)

Python nvcc GCC / G0 / [CTK13.3 GCC13 py3.14] Test cuda.cccl.examples(amd64, L4)

Python nvcc GCC / G0 / [CTK13.3 GCC13 py3.14] Test cuda.cccl.headers(amd64)

Python nvcc GCC / HI / [CTK12.9 GCC13 py3.14] Build cuda.stf(amd64)

Python nvcc GCC / HI / [CTK13.3 GCC13 py3.14] Test cuda.stf._experimental(amd64, L4)

Thrust nvcc GCC / Hw / [CTK13.3 GCC15 C++20] Build(amd64): sm{89}

Thrust nvcc GCC / Hw / [CTK13.3 GCC15 C++20] TestGPU(amd64, RTX4090): sm{89}

Thrust nvcc GCC / Hw / [CTK13.3 GCC15 C++20] TestCPU(amd64): sm{89}

Python nvcc MSVC / HU / [CTK12.9 MSVC14.44 py3.14] Build cuda.cccl(amd64)

Python nvcc MSVC / HU / [CTK13.3 MSVC14.44 py3.14] Test cuda.compute(amd64, L4)

Python nvcc MSVC / HU / [CTK13.3 MSVC14.44 py3.14] Test cuda.cccl.examples(amd64, L4)

Python nvcc MSVC / HU / [CTK13.3 MSVC14.44 py3.14] Test cuda.cccl.headers(amd64)

Thrust nvcc MSVC / IA / [CTK13.3 MSVC14.50 C++20] Build(amd64): sm{89}

Thrust nvcc MSVC / IA / [CTK13.3 MSVC14.50 C++20] TestCPU(amd64): sm{89}

CCCL C Parallel v2 (HostJIT) nvcc GCC / [CTK13.3 GCC13] Test(amd64, RTX2080)

CCCL Packaging nvcc Clang / [CTK13.3 Clang21] Test(amd64, RTX2080): sm{75}

CCCL Packaging nvcc GCC / [CTK13.3 GCC15] Install(amd64)

CCCL Packaging nvcc GCC / [CTK13.3 GCC15] Test(amd64, RTX2080): sm{75}

CCCL Packaging nvcc GCC / [CTK13.3 GCC15] Test(amd64, T4): sm{75} -min-cmake

clang-tidy ClangCUDA / [CTK12.9 Clang21 C++17] Build(amd64): sm{75}

CUB ClangCUDA / [CTK12.9 Clang21 C++20] BuildHostLaunch(amd64): sm{75;80;90;100;120}

CUB ClangCUDA / [CTK12.9 Clang21 C++20] BuildNoLaunch(amd64): sm{75;80;90;100;120}

CUB nvcc Clang / [CTK13.3 Clang21 C++20] BuildHostLaunch(amd64)

CUB nvcc Clang / [CTK13.3 Clang21 C++20] BuildNoLaunch(amd64)

CUB nvcc NVHPC / [CTK13.2 NVHPC26.5 C++20] BuildHostLaunch(amd64)

CUB nvcc NVHPC / [CTK13.2 NVHPC26.5 C++20] BuildNoLaunch(amd64)

cudax nvcc Clang / [CTK13.3 Clang21 C++20] Build(amd64): sm{75;120}

cudax nvcc NVHPC / [CTK13.2 NVHPC26.5 C++20] Build(amd64): sm{75;120}

libcu++ ClangCUDA / [CTK12.9 Clang21 C++17] Build(amd64): sm{75;80;90;100;120}

libcu++ ClangCUDA / [CTK12.9 Clang21 C++20] Build(amd64): sm{75;80;90;100;120}

libcu++ ClangCUDA / [CTK12.9 Clang21 C++23] Build(amd64): sm{75;80;90;100;120}

libcu++ nvcc Clang / [CTK12.0 Clang14 C++17] Build(amd64)

libcu++ nvcc Clang / [CTK12.0 Clang14 C++20] Build(amd64)

libcu++ nvcc Clang / [CTK12.9 Clang14 C++17] Build(amd64)

libcu++ nvcc Clang / [CTK12.9 Clang14 C++20] Build(amd64)

libcu++ nvcc Clang / [CTK12.9 Clang19 C++17] Build(amd64)

libcu++ nvcc Clang / [CTK12.9 Clang19 C++20] Build(amd64)

libcu++ nvcc Clang / [CTK13.0 Clang15 C++17] Build(amd64)

libcu++ nvcc Clang / [CTK13.0 Clang15 C++20] Build(amd64)

libcu++ nvcc Clang / [CTK13.0 Clang20 C++17] Build(amd64)

libcu++ nvcc Clang / [CTK13.0 Clang20 C++20] Build(amd64)

libcu++ nvcc Clang / [CTK13.3 Clang15 C++17] Build(amd64)

libcu++ nvcc Clang / [CTK13.3 Clang15 C++20] Build(amd64)

libcu++ nvcc Clang / [CTK13.3 Clang16 C++20] Build(amd64)

libcu++ nvcc Clang / [CTK13.3 Clang17 C++20] Build(amd64)

libcu++ nvcc Clang / [CTK13.3 Clang18 C++20] Build(amd64)

libcu++ nvcc Clang / [CTK13.3 Clang19 C++20] Build(amd64)

libcu++ nvcc Clang / [CTK13.3 Clang20 C++20] Build(amd64)

libcu++ nvcc Clang / [CTK13.3 Clang21 C++17] Build(amd64)

libcu++ nvcc Clang / [CTK13.3 Clang21 C++20] Build(arm64)

libcu++ nvcc GCC / [CTK12.0 GCC7 C++17] Build(amd64)

libcu++ nvcc GCC / [CTK12.0 GCC12 C++17] Build(amd64)

libcu++ nvcc GCC / [CTK12.0 GCC12 C++20] Build(amd64)

libcu++ nvcc GCC / [CTK12.9 GCC7 C++17] Build(amd64)

libcu++ nvcc GCC / [CTK12.9 GCC14 C++17] Build(amd64)

libcu++ nvcc GCC / [CTK12.9 GCC14 C++20] Build(amd64)

libcu++ nvcc GCC / [CTK13.0 GCC11 C++17] Build(amd64)

libcu++ nvcc GCC / [CTK13.0 GCC11 C++20] Build(amd64)

libcu++ nvcc GCC / [CTK13.0 GCC15 C++17] Build(amd64)

libcu++ nvcc GCC / [CTK13.0 GCC15 C++20] Build(amd64)

libcu++ nvcc GCC / [CTK13.3 GCC11 C++17] Build(amd64)

libcu++ nvcc GCC / [CTK13.3 GCC11 C++20] Build(amd64)

libcu++ nvcc GCC / [CTK13.3 GCC12 C++20] Build(amd64)

libcu++ nvcc GCC / [CTK13.3 GCC13 C++20] Build(amd64)

libcu++ nvcc GCC / [CTK13.3 GCC14 C++20] Build(amd64)

libcu++ nvcc GCC / [CTK13.3 GCC15 C++17] Build(amd64)

libcu++ nvcc GCC / [CTK13.3 GCC15 C++17] NVRTC(amd64, RTX2080): sm{75}

libcu++ nvcc GCC / [CTK13.3 GCC15 C++20] Build(arm64)

libcu++ nvcc GCC / [CTK13.3 GCC15 C++20] NVRTC(amd64, RTX2080): sm{75}

libcu++ nvcc GCC / [CTK13.3 GCC15] VerifyCodegen(amd64)

libcu++ nvcc NVHPC / [CTK13.2 NVHPC26.5 C++20] Build(amd64)

NVBench Helper nvcc Clang / [CTK13.3 Clang21] Test(amd64, RTX2080)

NVBench Helper nvcc GCC / [CTK13.3 GCC15] Test(amd64, RTX2080)

NVHPC stdpar nvcc NVHPC / [CTK13.2 NVHPC26.5 C++20] Build(amd64)

Thrust ClangCUDA / [CTK12.9 Clang21 C++20] Build(amd64): sm{75;120}

Thrust nvcc Clang / [CTK13.3 Clang21 C++20] Build(amd64): sm{75;120}

Thrust nvcc NVHPC / [CTK13.2 NVHPC26.5 C++20] Build(amd64): sm{75;120}

CCCL C Parallel nvcc MSVC / [CTK13.3 MSVC14.44] Build(amd64): sm{75}

CUB nvcc MSVC / [CTK13.3 MSVC14.50 C++20] BuildHostLaunch(amd64): sm{86}

CUB nvcc MSVC / [CTK13.3 MSVC14.50 C++20] BuildNoLaunch(amd64): sm{86}

cudax nvcc MSVC / [CTK13.3 MSVC14.50 C++20] Build(amd64): sm{75}

libcu++ nvcc MSVC / [CTK12.0 MSVC14.29 C++17] Build(amd64)

libcu++ nvcc MSVC / [CTK12.0 MSVC14.39 C++17] Build(amd64)

libcu++ nvcc MSVC / [CTK12.0 MSVC14.39 C++20] Build(amd64)

libcu++ nvcc MSVC / [CTK12.9 MSVC14.29 C++17] Build(amd64)

libcu++ nvcc MSVC / [CTK12.9 MSVC14.44 C++17] Build(amd64)

libcu++ nvcc MSVC / [CTK12.9 MSVC14.44 C++20] Build(amd64)

libcu++ nvcc MSVC / [CTK13.0 MSVC14.29 C++17] Build(amd64)

libcu++ nvcc MSVC / [CTK13.0 MSVC14.44 C++17] Build(amd64)

libcu++ nvcc MSVC / [CTK13.0 MSVC14.44 C++20] Build(amd64)

libcu++ nvcc MSVC / [CTK13.3 MSVC14.29 C++17] Build(amd64)

libcu++ nvcc MSVC / [CTK13.3 MSVC14.44 C++20] Build(amd64)

libcu++ nvcc MSVC / [CTK13.3 MSVC14.50 C++17] Build(amd64)

libcu++ nvcc MSVC / [CTK13.3 MSVC14.50 C++20] Build(amd64)

Verify Dev Containers / Verify devcontainer files are up-to-date

Verify Dev Containers / matrix.devcontainer.name

Build documentation

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Build RAPIDS (optional) / rmm ucxx raft cuvs nvforest cuml

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Bench Compare (${{ matrix.gpu }})

Compile-time Bench (public-headers-gcc13) / Compile-time: Public headers compile-time bench

Compile-time Bench (public-headers-gcc13) / Compile-time comment: Public headers compile-time bench

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