0.X.Y-notes.rst

.. currentmodule:: cuda.core.experimental

cuda.core 0.X.Y Release Notes

Released on TBD

Highlights

• Fix for :class:`LaunchConfig` grid parameter unit conversion when thread block clusters are used.

Breaking Changes

• CUDA 11 support dropped: CUDA 11 support is no longer tested and it may or may not work with cuda.bindings and CTK 11.x. Users are encouraged to migrate to CUDA 12.x or 13.x.
• LaunchConfig grid parameter interpretation: When :attr:`LaunchConfig.cluster` is specified, the :attr:`LaunchConfig.grid` parameter now correctly represents the number of clusters instead of blocks. Previously, the grid parameter was incorrectly interpreted as blocks, causing a mismatch with the expected C++ behavior. This change ensures that LaunchConfig(grid=4, cluster=2, block=32) correctly produces 4 clusters × 2 blocks/cluster = 8 total blocks, matching the C++ equivalent cudax::make_hierarchy(cudax::grid_dims(4), cudax::cluster_dims(2), cudax::block_dims(32)).
• When :class:`Buffer` is closed, :attr:`Buffer.handle` is now set to None. It was previously set to 0 by accident.

New features

• Added :attr:`Device.arch` property that returns the compute capability as a string (e.g., '75' for CC 7.5), providing a convenient alternative to manually concatenating the compute capability tuple.
• CUDA 13.x testing support through new test-cu13 dependency group.
• Stream-ordered memory allocation can now be shared on Linux via :class:`DeviceMemoryResource`.
• Added NVVM IR support to :class:`Program`. NVVM IR is now understood with code_type="nvvm".

New examples

None.

Fixes and enhancements

• Improved :class:`DeviceMemoryResource` allocation performance when there are no active allocations by setting a higher release threshold (addresses issue #771).
• Improved :class:`StridedMemoryView` creation time performance by optimizing shape and strides tuple creation using Python/C API (addresses issue #449).
• Fix :class:`LaunchConfig` grid unit conversion when cluster is set (addresses issue #867).
• Fixed a bug in :class:`GraphBuilder.add_child` where dependencies extracted from capturing stream were passed inconsistently with num_dependencies parameter (addresses issue #843).
• Make :class:`Buffer` creation more performant.
• Enabled :class:`MemoryResource` subclasses to accept :class:`Device` objects, in addition to previously supported device ordinals.