This is the release note of v12.2.0. See here for the complete list of solved issues and merged PRs.

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✨ Highlights

Support for CUDA 12.2

CuPy now supports CUDA 12.2. Note that there is a known issue on CUDA 12.2 for Windows. See #7776 for details.

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🛠️ Changes without compatibility

Deprecation of cupy-wheel Package

Due to the recent specification change in Pip 23.1, it became difficult for cupy-wheel to ensure detecting the CUDA version installed correctly. As discussed in RFC #7628, we have decided to remove this package in CuPy v13. To allow existing projects using cupy-wheel to continue to work, the package remains available for v12 releases.

📝 Changes

Enhancements

• Minor updates for cuQuantum/cuTensorNet support (#7730)
• Bump mypy version to 1.4.1 (#7736)
• Support CUDA 12.2 (#7752)

Performance Improvements

• Fix random module performance regression (#7592)

Bug Fixes

• Fix returned CUDA statuses not being checked (#7618)
• Fix cuSPARSE error message (#7684)
• Fix memory pool to try resolve fragmentation when limit is set (#7685)
• Fix type/exception annotations in cuSPARSE binding (#7703)
• Update pylibcugraph weakly connected components call (#7704)
• Improve detection for package installation source on Windows (#7711)
• Temporarily disable CUB histogram (#7716)
• Fix aweights type not checked in cupy.cov (#7717)
• Revert FP16 headers from CUDA 12.2.0 to CUDA 12.1.1 (#7773)

Code Fixes

• Introduce cython-lint (#7612)

Documentation

• Improve README and Installation Guide (#7599)
• update badges (#7600)
• Fix small typos in docstrings (#7657)
• Fix docstring of asarray (#7695)
• Add CUDA 12.2 to list of supported CUDA (#7756)
• Remove incorrect cupyx.distributed.NCCLBackend.all_gather comment (#7765)
• Fix Note highlight sections in README (#7770)
• Add notes for CUDA 12.2 on Windows support (#7778)

Installation

• Fix cupy-wheel package installation fails with pip 23.1+ (#7624)

Tests

• Bump versions of static checkers (#7598)
• Fix build-cuda test restore-keys not working (#7614)
• [v12] Require numpy<1.25 for round_ tests (#7642)
• Ignore pkg_resources deprecation warning on import (#7656)
• Skip TestLOBPCG::test_maxit_None in CUDA 12.1.1 & cuSOVLER 11.4.5 (#7670)
• Bump CUDA minor versions used in CI (#7683)
• [v12] Allow specifying Docker repository for CI images (#7690)
• Use "/test" tag configuration from pull-request base branch (#7706)
• XFAIL known test failures in cuSPARSE module (#7725)
• Fix test_fht not to feed cupy.ndarray to scipy.fft.fhtoffset (#7728)
• CI: remove explicit Cython installation (#7731)
• Fix test_sum_duplicates_incompatibility for SciPy 1.11 (#7768)

Others

• Fix flake8-cython not working (#7606)
• Add env var to disable RPATH (#7718)
• Bump version to v12.2.0 (#7755)

👥 Contributors

The CuPy Team would like to thank all those who contributed to this release!

@12rambau @asi1024 @emcastillo @jnke2016 @kmaehashi @leofang @pelmers @pri1311 @RandomY-2 @takagi