v0.19.0

This release features official, out-of-the-box support for compiling dpctl for specified AMD GPU architectures, the addition of new function tensor.top_k, a radix-sort-based implementation of sorting functions, and improvements to interoperability with DLPack through tensor.dldevice_to_sycl_device and tensor.sycl_device_to_dldevice.

A number of adjustments were also made to improve performance of dpctl reductions (i.e., sum, min, max, etc.), accumulators (i.e., cumulative_sum, cumulative_logsumexp), and copy-and-cast operations.

Added

• Support for compiling dpctl for specified AMD GPU architecture with use of CodePlay oneAPI plug-in gh-1731
• Added tensor.top_k per Python Array API specification gh-1921
• Added functions tensor.dldevice_to_sycl_device and tensor.sycl_device_to_dldevice for converting between DLPack and sycl devices, and a method get_device_id to dpctl.SyclDevice to improve interoperability with DLPack protocol gh-1953
• Added DPCTL_OFFLOAD_COMPRESS cmake option (set to OFF by default) to toggle --offload-compress linker option when building dpctl gh-1961

Changed

• Improved performance of copy-and-cast operations from numpy.ndarray to tensor.usm_ndarray for contiguous inputs gh-1829
• py_sort and py_argsort now throw py::value_error if inputs are not C-contiguous gh-1838
• Improved performance of copying operation to C-/F-contig array, with optimization for batch of square matrices gh-1850
• Improved performance of tensor.argsort function for all types gh-1859
• Improved performance of tensor.sort and tensor.argsort for short arrays in the range [16, 64] elements gh-1866
• Implemented radix sort algorithm to be used in dpt.sort and dpt.argsort gh-1867, gh-1883
• Extended dpctl.SyclTimer with device_timer keyword, implementing different methods of collecting device times gh-1872
• dpctl changed to see GPU devices out of the box in virtual environment on Windows gh-1922
• Improved performance of tensor.cumulative_sum, tensor.cumulative_prod, tensor.cumulative_logsumexp as well as performance of boolean indexing gh-1923, gh-1942
• Improved performance of tensor.min, tensor.max, tensor.logsumexp, tensor.reduce_hypot for floating point type arrays by at least 2x gh-1932, gh-1937
• Updated Cython examples to use scikit-build gh-1935
• Reduced binary size of _tensor_accumulation_impl by 13 MB gh-1957
• Extended tensor.asarray to support objects that implement __usm_ndarray__ property to be interpreted as usm_ndarray objects gh-1959
• tensor.usm_ndarray object disallows implicit conversions to NumPy array gh-1964
• stream arguments in tensor.usm_ndarray methods now raise an error if stream is not a tensor.SyclQueue gh-1969
• dpctl initialization sets subprocess to use SPAWN method on Linux to enable gdb-oneapi to debug kernels submitted from Python applications gh-1971
• Reduced binary size of _tensor_elementwise_impl gh-1976
• Allow dpctl.SyclQueue.memcpy to and from multi-dimensional buffers gh-1985

Fixed

• Fixed a bug in tensor.roll for very large values of shift gh-1869
• Fix for tensor.result_type when all inputs are Python built-in scalars gh-1877
• Improved error in constructors tensor.full and tensor.full_like when provided a non-numeric fill value gh-1878
• Added a check for pointer alignment when copying to C-contiguous memory gh-1890, gh-1891
• Fixed dpctl installed into virtual environment not finding DPC++ runtime libraries by adding DPCTL_WITH_REDIST cmake option (set to OFF by default) gh-1893
• Fixed incorrect result (issue gh-1901) in tensor.cumulative_sum and in advanced indexing gh-1902
• Fixed __setitem__() for tensor.usm_ndarray when passed an empty boolean mask gh-1915
• tensor.from_dlpack docstring now shows that return type can be NumPy array and stipulates when this will be the case gh-1919
• Fixed docstring in helper class in DLPack tests gh-1920
• Fixed a bug in tensor.astype where copy=False would not be respected for 1d arrays when order keyword is specified gh-1928
• Replaced deprecated CL/sycl.hpp with recommended sycl/sycl.hpp in examples gh-1933
• Fixed tensor.take_along_axis and tensor.put_along_axis raising an error for tensor.uint64 indices when given an array of dimension greater than 1 gh-1934
• Fixed unexpected results of tensor.sum with a requested output type of bool gh-1958
• Use std::move to avoid unnecessary copying of temporary in triul_ctor.cpp gh-1960
• Make stream a keyword-only argument in tensor.usm_ndarray.to_device per requirement by array API specification gh-1966
• Improve efficiency of copy implementation and avoid an unnecessary kernel invocation in tensor.argsort for 1d input gh-1967
• Corrected uses of NumPy constructors with tensor.usm_ndarray inputs in test suite gh-1968
• Fixed array API namespace inspection utilities showing complex128 as a valid dtype on devices without double precision and device keywords not working with dpctl.SyclQueue or filter strings gh-1979
• Fixed a bug in test_sycl_device_interface.cpp which would cause compilation to fail with Clang version 20.0 gh-1989
• Fixed memory leaks in smart-pointer-managed USM temporaries in synchronizing kernel calls gh-2002
• UsmNDArray_MakeSimpleFromPtr and UsmNDArray_MakeFromPtr now raise an error when provided an invalid typenum before attempting to create the array gh-2003
• Fixed typos in tensor.from_numpy and tensor.astype gh-2006

Maintenance

• Revert pinning of cmake to 3.26 on Windows gh-1823
• Update black version used in Python code style workflow gh-1828
• Fixed CI/CD workflow for building conda packages on Windows gh-1831
• Revert work-around in test_sycl_kernel_submit.py for problem in MKL 2024.2.0 gh-1836
• Do not use Mambaforge variant of miniforge as deprecated gh-1844
• Use pybind11=2.13.6 gh-1845
• Remove unnecessary include in C++ header file gh-1846
• Build translation unit "simplify_iteration_space.cpp" compiled multiple times as a static library gh-1847
• Add instructions for installing dpctl from Intel PyPi channel gh-1860
• Fix warnings when generating docs gh-1855, gh-1861
• Align conda recipe with conda-forge's {{ stdlib("c") }} migration gh-1868
• Add missing include of SYCL header to "math_utils.hpp" gh-1899
• Add support of CV-qualifiers in is_complex<T> helper gh-1900
• Tuning work for elementwise functions with modest performance gains (under 10%) gh-1889
• Reduce binary size of accumulators by saving repeated expressions to a temporary gh-1896
• Added workflow to run nightly tests of dpctl gh-1903, gh-1905
• Support and testing for Python 3.13 for dpctl gh-1941, gh-1943
• Change libtensor to use std::size_t and dpctl::tensor::ssize_t throughout and fix missing includes for std::size_t and size_t gh-1950
• Fixed some unqualified size_t and fixed-width integral types in libtensor gh-1955
• Add versioneer as a build requirement in documentation on building dpctl from source gh-1972
• Remove const qualifiers for class and struct members gh-1974, gh-1975
• Various code quality improvements to test_sycl_queue_submit_local_accessor_arg.cpp gh-1990
• Added Python 3.12 to package metadata gh-2005
• Miscellaneous changes to continuous integration/delivery (CI/CD) supporting scripts:
  gh-1837, gh-1839, gh-1848, gh-1853, gh-1854, gh-1856, gh-1858, gh-1863, gh-1864, gh-1865, gh-1881, gh-1882, gh-1884, gh-1886, gh-1888, gh-1897, gh-1898, gh-1909, gh-1916, gh-1927, gh-1940, gh-1948, gh-1949, gh-1952, gh-1962, gh-1963, gh-1973, gh-1980, gh-1981, gh-1983, gh-1988

New Contributors

• @sommerlukas made their first contribution in #1985