More changes for dropping 3.10 / adding 3.15 by mdboom · Pull Request #3113 · NVIDIA/cuda-python

mdboom · 2026-10-14T21:03:20Z

This is a follow-on with a bunch of things that got missed in #3080.

coderabbitai · 2026-10-14T21:06:35Z

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📝 Summary

Summary by CodeRabbit

Documentation
- Updated Python requirements for project helpers and most samples from 3.10+ to 3.11+; one sample now requires Python 3.12+.
Bug Fixes
- CUDA operation failures now include additional error details as exception notes, with consistent reporting.
Compatibility
- Added Python 3.15 support across packages and included Python 3.15 wheel artifacts in processing. Python 3.15 nightly-wheel setup was removed, and test failures on Python 3.15 now follow normal failure behavior.

The pull request updates Python compatibility code, package metadata, wheel workflows, and documented requirements. It removes exception-note fallbacks and compatibility dependencies, adjusts Python 3.15 and 3.16 CI handling, and raises documented minimum versions.

Changes: Python version support

Layer / File(s)	Summary
Core compatibility and error handling `cuda_core/cuda/core/_utils/`, `cuda_core/cuda/core/_memory/_copy_enums.py`, `cuda_core/cuda/core/system/typing.py`, `cuda_core/pixi.toml`, `cuda_core/tests/`, `cuda_core/AGENTS.md`, `cuda_core/cuda/core/_cpp/rt/DESIGN.md`, `cuda_bindings/pixi.toml`, `cuda_python_test_helpers/pyproject.toml`	Core code imports `StrEnum` from the standard library and calls `add_note` without a fallback. Compatibility dependencies and Python-version-specific test branches are removed. Error-handling guidance describes exception notes without version-specific behavior.
Python 3.15 package and CI support `cuda_bindings/pyproject.toml`, `cuda_core/pyproject.toml`, `cuda_pathfinder/pyproject.toml`, `cuda_pathfinder/tests/test_find_nvidia_headers.py`, `cuda_python/pyproject.toml`, `.github/workflows/*wheel.yml`, `ci/ci-pipeline.mmd`, `ci/tools/download-wheels`	Package metadata and CI include Python 3.15 support. Wheel workflows allow prereleases for Python 3.16 and remove Python 3.15 nightly-wheel setup and test exceptions. Artifact processing no longer excludes matching Python 3.15 directories.
Documented Python requirements `.github/actions/check-doc-links/action.yml`, `samples/cuda_bindings//README.md`, `samples/cuda_core//README.md`, `samples/cuda_core/*/requirements.txt`	The action prerequisite and sample requirements specify Python 3.11 or newer. The systemInfo sample specifies Python 3.12 or newer.

Priority: ➖ Normal

Change: Feature

Merge Risk: ⚪ Minimal · up to cfb28

The Python compatibility dependency is updated, with no conflicting requirement found in the supported test workflows. Normal checks remain appropriate, but no identified issue blocks merging.

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Reviewing files that changed from the base of the PR and between 1f41281 and 92982ea.

📒 Files selected for processing: 77

.github/actions/check-doc-links/action.yml
.github/workflows/build-wheel.yml
.github/workflows/test-wheel-linux.yml
.github/workflows/test-wheel-windows.yml
ci/ci-pipeline.mmd
ci/tools/download-wheels
cuda_bindings/pixi.toml
cuda_bindings/pyproject.toml
cuda_core/AGENTS.md
cuda_core/cuda/core/_cpp/rt/DESIGN.md
cuda_core/cuda/core/_memory/_copy_enums.py
cuda_core/cuda/core/_utils/cuda_utils.pyx
cuda_core/cuda/core/_utils/pycompat.py
cuda_core/cuda/core/system/typing.py
cuda_core/pixi.toml
cuda_core/tests/graph/test_graph_builder.py
cuda_core/tests/test_enum_coverage.py
cuda_core/tests/test_error_handling.py
cuda_python_test_helpers/pyproject.toml
samples/cuda_bindings/0_Introduction/clockNvrtc/README.md
samples/cuda_bindings/0_Introduction/simpleCubemapTexture/README.md
samples/cuda_bindings/0_Introduction/systemWideAtomics/README.md
samples/cuda_bindings/0_Introduction/vectorAddDriverApi/README.md
samples/cuda_bindings/0_Introduction/vectorAddMmap/README.md
samples/cuda_bindings/2_Concepts_and_Techniques/streamOrderedAllocation/README.md
samples/cuda_bindings/3_CUDA_Features/cudaGraphsManualNodes/README.md
samples/cuda_bindings/3_CUDA_Features/globalToShmemAsyncCopy/README.md
samples/cuda_bindings/4_CUDA_Libraries/conjugateGradientMultiBlockCG/README.md
samples/cuda_bindings/4_CUDA_Libraries/nvidiaSmi/README.md
samples/cuda_bindings/extra/isoFdModelling/README.md
samples/cuda_bindings/extra/jitProgram/README.md
samples/cuda_core/binarySearch/README.md
samples/cuda_core/blockwiseSum/README.md
samples/cuda_core/blurImageUnifiedMemory/README.md
samples/cuda_core/copyImageArraytoGPU/README.md
samples/cuda_core/cudaComputeLambdas/README.md
samples/cuda_core/cudaGraphs/README.md
samples/cuda_core/customPyTorchKernel/README.md
samples/cuda_core/customTensorFlowKernel/README.md
samples/cuda_core/deviceQuery/README.md
samples/cuda_core/fftSignalAnalysis/README.md
samples/cuda_core/glInteropFluid/README.md
samples/cuda_core/glInteropMipmapLod/README.md
samples/cuda_core/glInteropPlasma/README.md
samples/cuda_core/greenContext/README.md
samples/cuda_core/ipcMemoryPool/README.md
samples/cuda_core/jitLtoLinking/README.md
samples/cuda_core/kernelNsysProfile/README.md
samples/cuda_core/launchConfigTuning/README.md
samples/cuda_core/launchConfigTuning/requirements.txt
samples/cuda_core/matrixMulSharedMem/README.md
samples/cuda_core/memoryResources/README.md
samples/cuda_core/multiGPUGradientAverage/README.md
samples/cuda_core/pageRank/README.md
samples/cuda_core/parallelHistogram/README.md
samples/cuda_core/parallelHistogram/requirements.txt
samples/cuda_core/parallelReduction/README.md
samples/cuda_core/persistentProgramCache/README.md
samples/cuda_core/prefixSum/README.md
samples/cuda_core/prefixSum/requirements.txt
samples/cuda_core/processCheckpoint/README.md
samples/cuda_core/reduction/README.md
samples/cuda_core/reductionMultiBlockCG/README.md
samples/cuda_core/simpleMultiGpu/README.md
samples/cuda_core/simpleP2P/README.md
samples/cuda_core/simplePrint/README.md
samples/cuda_core/simpleZeroCopy/README.md
samples/cuda_core/streamingCopyComputeOverlap/README.md
samples/cuda_core/streamingCopyComputeOverlap/requirements.txt
samples/cuda_core/stridedMemoryViewConstructors/README.md
samples/cuda_core/stridedMemoryViewCpu/README.md
samples/cuda_core/stridedMemoryViewGpu/README.md
samples/cuda_core/systemInfo/README.md
samples/cuda_core/textureSample/README.md
samples/cuda_core/threadBlockCluster/README.md
samples/cuda_core/tmaTensorMap/README.md
samples/cuda_core/vectorAdd/README.md

💤 Files with no reviewable changes: 5

cuda_bindings/pixi.toml
cuda_core/tests/test_enum_coverage.py
cuda_core/pixi.toml
cuda_bindings/pyproject.toml
cuda_python_test_helpers/pyproject.toml

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.github/workflows/test-wheel-linux.yml
.github/workflows/test-wheel-windows.yml
cuda_bindings/pyproject.toml
cuda_core/pyproject.toml
cuda_pathfinder/pyproject.toml
cuda_pathfinder/tests/test_find_nvidia_headers.py
cuda_python/pyproject.toml

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.github/workflows/test-wheel-linux.yml
.github/workflows/test-wheel-windows.yml

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github-actions · 2026-10-15T13:03:51Z

Doc Preview CI
Preview removed because the pull request was closed or merged.

Andy-Jost

Approving. CI is green, and the 3.10 cleanup and the 3.15 guard removals look right. Three non-blocking follow-ups:

No CUDA 12 test job on Python 3.15. All 3.15 jobs run on CUDA 13.4.2 (ci/test-matrix.yml L60-L61, L132). So CI never imports the CUDA 12 half of a cp315 cuda-core wheel. cuda-bindings 12.9.10 now has cp315 wheels on PyPI, so pip install "cuda-core[cu12]" resolves on 3.15. Only the test coverage is missing. Suggestion: add a PY_VER: '3.15', CUDA_VER: '12.9.1' row. #3108 adds the same coverage on the 1.2.x branch.
The ml-dtypes cap keeps a guard whose TODO is now met. ml-dtypes 0.6.0 has cp315 and cp315t wheels for win_amd64, win_arm64, and manylinux x86_64/aarch64. The <0.6.0 cap holds CI at 0.5.4, which has no cp315 wheels (cuda_core/pyproject.toml L84-L85). As a result, the Windows 3.15 job skips test_bfloat16_mapping with "ml_dtypes not installed", and the Linux 3.15 jobs build ml-dtypes 0.5.4 from source. If the tests pass with 0.6.x, raise the cap and remove the Windows 3.15 guard and its TODO.
Stale numpy cap in the cuda-bindings test group. cuda_bindings/pyproject.toml L48-L49 keeps numpy>=1.21.1,<=2.6.0.dev0 and its comment about scientific-python nightlies. This PR removes the nightly index, and numpy 2.5.4 has cp315 wheels, so the comment no longer applies. The cap will also exclude numpy 2.6.0 when it ships. <2.6 gives the same result for releases without the comment. Or remove the cap if CI should run numpy 2.6.

Removed preview folders for the following PRs: - PR #2902 - PR #3061 - PR #3105 - PR #3108 - PR #3113 - PR #3122

More changes for dropping 3.10 / adding 3.15

92982ea

mdboom requested a review from leofang October 14, 2026 21:03

github-actions Bot added CI/CD CI/CD infrastructure cuda.bindings Everything related to the cuda.bindings module cuda.core Everything related to the cuda.core module labels Oct 14, 2026

mdboom requested a review from Andy-Jost October 14, 2026 21:05

coderabbitai Bot reviewed Oct 14, 2026

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Comment thread samples/cuda_core/systemInfo/README.md Outdated

mdboom added 2 commits October 14, 2026 17:09

Fix inconsistency found by CodeRabbit

a8aeb26

Even more stuff

189ae81

github-actions Bot added the cuda.pathfinder Everything related to the cuda.pathfinder module label Oct 14, 2026

mdboom self-assigned this Oct 14, 2026

mdboom added this to the cuda.core next milestone Oct 14, 2026

coderabbitai Bot reviewed Oct 14, 2026

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Comment thread cuda_core/pyproject.toml Outdated

Update cffi to a version that supports Python 3.15

cfb2838

Andy-Jost approved these changes Oct 15, 2026

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mdboom merged commit 166cd5a into NVIDIA:main Oct 15, 2026
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mdboom mentioned this pull request Oct 15, 2026

Last 3.15 changes #3121

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github-actions Bot pushed a commit that referenced this pull request Oct 16, 2026

Clean up PR preview folders for 6 closed/merged PRs

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Removed preview folders for the following PRs: - PR #2902 - PR #3061 - PR #3105 - PR #3108 - PR #3113 - PR #3122

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More changes for dropping 3.10 / adding 3.15 - #3113

More changes for dropping 3.10 / adding 3.15#3113
mdboom merged 4 commits into
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mdboom:drop-3.10-features

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