v25.01.00

This is a beta release of cuPyNumeric.

Linux x86 and ARM conda packages are available at https://anaconda.org/legate/cupynumeric.

Documentation for this release can be found at https://docs.nvidia.com/cupynumeric/25.01/.

New features

Added functionality

• Add the method parameter to cupynumeric.convolve.
• Increase the maximum array dimension from 4 to 6.
• Experimental support for NumPy 2.0 (not reflected in the package constraints yet).

Memory management enhancements

• Updates to take advantage of the deferred-eager pool unification in Legate. This change has the potential to increase the effective available memory capacity by up to 100% for many usecases. It also removes the need for the user to adjust the --eager-alloc-percentage.
• Add the offload_to() API, that allows a user to offload an array to a particular memory kind, such that any copies in other memories are discarded. This can be useful e.g. to evict an array from GPU memory onto system memory, freeing up space for subsequent GPU tasks.

I/O improvements

• Use cuFile to accelerate HDF5 reads on the GPU.
• Add support for reading "binary" HDF5 datasets (in particular useful for reading boolean-type datasets).

UX Improvements

• Consider NUMA node topology when allocating CPU cores and memory during automatic machine configuration.
• Add environment variable LEGATE_LIMIT_STDOUT, to only print out the output from one of the copies of the top-level program in a multi-process execution.
• Remove an extraneous warning about __buffer__ being unimplemented.

Deprecations

• Drop support for the Maxwell GPU architecture. cuPyNumeric now requires at least Pascal (sm_60).

v24.11.02

This is a patch release of cuPyNumeric.

Linux x86 and ARM conda packages are available at https://anaconda.org/legate/cupynumeric.

Documentation for this release can be found at https://docs.nvidia.com/cupynumeric/24.11/.

Packaging Changes

• Update for Legate v24.11.01

v24.11.01

This is a patch release of cuPyNumeric.

Linux x86 and ARM conda packages are available at https://anaconda.org/legate/cupynumeric.

Documentation for this release can be found at https://docs.nvidia.com/cupynumeric/24.11/.

Bug Fixes

• Explicit fallback to __array__() on __buffer__

v24.11.00

This is a beta release of cuPyNumeric.

Linux x86 and ARM conda packages are available at https://anaconda.org/legate/cupynumeric.

Documentation for this release can be found at https://docs.nvidia.com/cupynumeric/24.11/.

New features

Improved API coverage

• Implement np.unravel_index
• Implement np.angle
• Implement np.median
• Implement np.ix_
• Implement np.meshgrid
• Implement np.expand_dims
• Implement np.rot90
• Implement np.round
• Implement np.fft.fftshift and np.fft.ifftshift
• Implement np.roll
• Support full_matrices parameter of np.linalg.svd

Memory management enhancements

• Memory efficient implementation of matrix multiplication - this implementation batches over the reduction dimension, achieving constant memory overhead regardless of array sizes.
• Memory efficiency for stencil computation - add np.ndarray.stencil_hint method, that instructs cuPyNumeric to pre-allocate the necessary space for ghost elements when an array is to be used in a stencil computation, reducing intermediate memory use.
• Memory allocation report - report the object-memory mapping when a computation runs out of memory, to help users debug and optimize memory usage.

Enhanced infrastructure support

• GH200 Grace Hopper Superchip support - allows users to leverage GH200-based cloud instances and supercomputers.
• GASNet support - support GASNet as an alternative networking backend to UCX, using a GASNet wrapper, MPI wrapper, and custom build utilities.
• Initial HDF5 support - distributed read/write of HDF5 files using a POSIX backend.
• Automatic resource configuration at run time - automatically discover and use all the available compute resources including CPU, GPU, system memory, and framebuffer memory.
• More enhancements from Legate 24.11

Other

• Re-implement the RNG module on top of the C++ STL random library, removing the need to have cuRand in CPU-only installations.

Known Issues

cuPyNumeric will emit a false-positive warning like the following:

RuntimeWarning: cuPyNumeric has not implemented numpy.ndarray.__buffer__ and is falling back to canonical NumPy. You may notice significantly decreased performance for this function call.

in cases such as when an arithmetic operation is performed on a scalar array, e.g. cupynumeric.array(42) * 2. There is no actual performance degradation occurring in this case. We are working on a patch that will suppress this warning.

v24.06.01

This is a patch release, and includes the following fixes:

• Fix for nv-legate/legate#947
• Fix package dependencies (cuda and openblas)

x86 conda packages with multi-node support (based on UCX) are available at https://anaconda.org/legate/cunumeric.

Documentation for this release can be found at https://docs.nvidia.com/cunumeric/24.06/.

v24.06.00

This release ports cuNumeric to the C++-based Legate-Core. Additionally, it includes the following new features:

• np.linalg.qr, np.linalg.svd (single-GPU support only)
• "where" argument for unary operations
• np.select
• np.flipup, np.fliplr
• np.cov
• np.load (initial, unoptimized implementation)
• np.average
• np.logical_and/or.reduce
• np.digitize
• np.diff
• np.linalg.cholesky, np.linalg.solve (multi-GPU support, based on cuSolverMp -- not included in conda packages, requires a manual build)
• C++-based ndarray class (experimental support)

x86 conda packages with multi-node support (based on UCX) are available at https://anaconda.org/legate/cunumeric.

Documentation for this release can be found at https://docs.nvidia.com/cunumeric/24.06/.

Known issues

Including the nvidia conda channel in an environment with cunumeric may end up pulling cutensor 2.0, even though the cunumeric packages explicitly request cutensor 1.7. This can cause error messages like this:

OSError: libcutensor.so.1: cannot open shared object file: No such file or directory

This is not an issue with cuNumeric, but with incorrect constraints on the cutensor packages on the nvidia channel. Please avoid including the nvidia conda channel in any conda environment including cunumeric.

v23.11.00

This release contains performance improvements to the variance operation, and a multi-dimensional Cholesky implementation.

Conda packages for this release are available at https://anaconda.org/legate/cunumeric.

What's Changed

🚀 New Features

• Added variance as a unary reduction by @jjwilke in #593
• Add batched cholesky implementation and tests by @jjwilke in #1029

🐛 Bug Fixes

• Replacing set with OrderedSet to avoid control-replication violations by @ipdemes in #1054
• Inline boolean operators in NumPy are bitwise, not logical by @manopapad in #1057
• Fix #1065 ("where" fails with IndexError) by @manopapad in #1067
• Fixes #1069, #1070 (minor einsum bugs) by @manopapad in #1072

📖 Documentation

• Suggest using mamba over conda by @manopapad in #1068

Full Changelog: v23.09.00...v23.11.00

v23.09.00

This release adds support for the quantile API, and includes some performance and documentation improvements (notably a "Best Practices" guide).

Conda packages for this release are available at https://anaconda.org/legate/cunumeric.

What's Changed

🚀 New Features

• Quantile Implementation by @aschaffer in #664

🛠️ Improvements

• Add missing openmp variants to BitGenerator and UniqueReduce by @rohany in #1010
• Histogram refactor by @aschaffer in #1003

📖 Documentation

• Add best practices info to sphinx docs by @bryevdv in #1048

🐛 Bug Fixes

• Missing alignment on histogram call by @manopapad in #999
• Fix for control replication violation in test by @ipdemes in #1005
• Fix build instructions link by @bryevdv in #1014
• Add back None as an accepted value for axis on some type sigs by @manopapad in #1017
• If a scalar ufunc arg is cn.ndarray use its type directly by @manopapad in #1011
• Skip the docstrings for functions pulled from cloned modules by @manopapad in #1024
• Fix random test failures in CPU-only runs by @manopapad in #1025
• Don't cast histogram to int64 when density=True by @manopapad in #1042
• Explicitly cast result of shift binary operators by @manopapad in #1046
• Remove use of deprecated np.find_common_type by @manopapad in #1045

New Contributors

• @ajschmidt8 made their first contribution in #1035

Full Changelog: v23.07.00...v23.09.00

v23.07.00

This release adds support for histogram, broadcast* and various nan* APIs. It also includes performance improvements to the FFT functions and cleanups in ufunc support.

Conda packages for this release are available at https://anaconda.org/legate/cunumeric.

What's Changed

🚀 New Features

• Implement broadcast routines by @bryevdv in #759
• Sanitize unary reductions that have NaNs by @shriram-jagan in #925
• Histogram Functionality by @aschaffer in #983

🛠️ Improvements

• Add ufunc methods by @bryevdv in #834
• Support of the shape argument in empty_like() & Co. by @madsbk in #845
• Add support for Python 3.11 (#830) by @marcinz in #837
• Ensure ufunc/function dispatching is narrow by @seberg in #977
• Fft improvements by @mfoerste4 in #732

📖 Documentation

• Note new minimum CUDA requirements for conda packages by @manopapad in #875

🐛 Bug Fixes

• Fix bugs in concatenate and stack APIs. by @robinwnv in #844
• Fixes #858 by @manopapad in #859
• Fix concatenate and *stack APIs to support scalars(#818, #839) by @robinwnv in #866
• Avoid following compiler symlinks by @manopapad in #880
• Fix for some binary operators on float16 by @magnatelee in #889
• WAR for TBLIS compiler detection while upstream PR is pending by @manopapad in #890
• Also build CPU-only packages for haswell (#869) by @marcinz in #882
• Fix array API(#885). by @robinwnv in #910
• Fix unit tests by @magnatelee in #920
• Fix an incorrect type by @marcinz in #931
• Use correct type, to avoid int narrowing by @manopapad in #941
• Fix cunumeric.arange issues by @yimoj in #940
• Use the right type for scalar arguments by @magnatelee in #942
• Fall back to NumPy eagerly on RandomState methods by @manopapad in #959
• Fix bugs in random integer functions by @manopapad in #966
• Resolve numpy 1.25 issues by @bryevdv in #973
• Set lib_dir explicitly to lib/, even on RHEL by @manopapad in #971
• fixing putmask logic for scalar inputs by @ipdemes in #980
• fixing cuda error by @ipdemes in #978
• Change arg to LLONG_MIN to make it consistent with python. by @shriram-jagan in #986
• Missing alignment on histogram call by @manopapad in #1000

New Contributors

• @madsbk made their first contribution in #845
• @sandeepd-nv made their first contribution in #899
• @seberg made their first contribution in #977
• @shriram-jagan made their first contribution in #988
• @aschaffer made their first contribution in #983

Full Changelog: v23.03.00...v23.07.00

v23.03.00

This is the beta release of cuNumeric.

This release is focused on bug fixes, code clean-up and documentation updates, in preparation for entering beta status.

Conda packages for this release are available at https://anaconda.org/legate/cunumeric.

What's Changed

🐛 Bug Fixes

• Do reductions properly in tensor contraction tasks by @magnatelee in #803
• Seed the NumPy RNG at the start of every test by @manopapad in #792
• Fix handling of negative axis in np.repeat by @manopapad in #821
• Fix for #720 (by @lightsighter) by @manopapad in #721
• Ensure unary_func seeding is deterministic across processes by @manopapad in #825

🛠️ Improvements

• Update the architectures built in conda package by @marcinz in #770
• Use thrust::cuda::par_nosync if available by @magnatelee in #780
• Preemptively convert to np.ndarray on NumPy fallback by @manopapad in #802
• Removing all Legion references from the code by @magnatelee in #811
• Remove exception throwing from RNG code by @manopapad in #815
• Pin legate to a specific commit by @trxcllnt in #824
• Add support for Python 3.11 by @m3vaz in #830

📖 Documentation

• [WIP] Docs refresh by @bryevdv in #805

Full Changelog: v23.01.00...v23.03.00