v0.21.0

This release features the addition of new function tensor.isin, indexing of tensor.usm_ndarray with numpy.ndarray, and support for building dpctl for specific CUDA architectures.

Improvements were also made to the build time and binary size of the project, and to the build driver script, making it more convenient when building for CUDA or AMD devices.

Added

• Added tensor.isin per future Python Array API specification version gh-2098
• numpy.ndarrays are now permitted when indexing on tensor.usm_ndarray gh-2128

Changed

• Made a number of constexpr variables inline or static throughout the project, especially in headers, to reduce binary size and improve build time gh-2094, gh-2107
• DPCTL_TARGET_CUDA and DPCTL_TARGET_HIP now permit specifying the CUDA or HIP architectures gh-2096, gh-2099
• Extended build_locally.py build driver script to permit --target-cuda and --target-hip options, which match the behavior of DPCTL_TARGET_CUDA and DPCTL_TARGET_HIP gh-2109
• Improved tensor.asnumpy and tensor.to_numpy for size-0 arrays gh-2120
• Permit type casting size-0 tensor.usm_ndarray to arbitrary dtype via tensor.usm_ndarray constructor's buffer keyword (i.e., using the original memory as the buffer for the new size-0 array's underlying memory) gh-2123

Fixed

• Fixed tensor.asarray failing when given device keyword with an input array of a dtype not supported by device gh-2097
• Fixes undefined behavior in radix sort algorithm and avoids call to sorting algorithms when calling tensor.sort and tensor.argsort on size-1 arrays, or along a size-1 axis gh-2106
• Fixed incorrect results when calling dpt.astype on tensor.usm_ndarray constructed from a boolean view into a numpy.ndarray gh-2122
• Fixed dpctl imported in virtual environment on Windows failing to see devices or find DLLs gh-2130
• Fixed Cythonization failure when testing the ability to create dpctl Cython API extensions with an editable install gh-2147

Maintenance

• Revert restricting Cython to below 3.1.0 when building dpctl for Python 3.13 gh-2118
• Add a link to tensor.DLDeviceType documentation from __dlpack_device__ docstring gh-2127
• Update pybind11 to 3.0.1 gh-2145
• Miscellaneous changes to continuous integration/delivery (CI/CD) supporting scripts gh-2043, gh-2044, gh-2065, gh-2066, gh-2068, gh-2070 gh-2088, gh-2104, gh-2151, gh-2154, gh-2155

v0.20.2

This release is identical to 0.20.1 in terms of features

This release adds metadata and conda recipe changes intended for releasing the dpctl package with Python 3.13

v0.20.1

This is a bug fix release which fixes missing event dependencies in roll and reshape Python bindings for size-1 input arrays, see gh-2095

v0.20.0

This release achieves compliance of dpctl.tensor with the Python Array API 2024.12 standard.

The dpctl namespace has also received a number of new features, including new Python classes dpctl.LocalAccessor, dpctl.WorkGroupMemory, and dpctl.RawKernelArg to be used as kernel argument types, support for peer access between dpctl.SyclDevice instances, and support for composite Level Zero devices.

Added

• Added dpctl.WorkGroupMemory class representing sycl::ext::oneapi::experimental::work_group_memory, to be used as a kernel argument type gh-1984
• Added dpctl.LocalAccessor class representing sycl::local_accessor, to be used as a kernel argument type gh-1991
• Added dpctl.SyclPlatform.get_devices method for getting all dpctl.SyclDevices for the platform gh-1992
• Added support for the composite devices extension for Level Zero devices, usable with some devices when setting ZE_FLAT_DEVICE_HIERARCHY=COMBINED gh-1993
• Added out keyword to tensor.take gh-2010
• Added dpctl.RawKernelArg class representing sycl::ext::oneapi::experimental::raw_kernal_arg, to be used as a kernel argument type gh-2038
• Added dpctl.SyclDevice methods for querying, enabling, and disabling peer access between devices gh-2077, gh-2082

Changed

• Updated Level Zero loader detection to no longer rely on reading libur_adapter_level_zero.so for the loader filename gh-2025
• Updated integer array indexing to align with the 2024.12 array API specification gh-2032
• Support for Boolean data-type is added to dpctl.tensor.ceil, dpctl.tensor.floor, and dpctl.tensor.trunc gh-2033
• Changed implementation of DPCTLPlatform_GetDefaultContext from using deprecated ext_oneapi_get_default_context to khr_get_default_context gh-2042
• Updated supported array API specification version to 2024.12 gh-2047
• Implementation struct for tensor.imag now uses a static member value for the imaginary part of real-valued inputs gh-2063
• Updated repr to show the shape of the abbreviated arrays and show the shape and data type of zero-size arrays gh-2067
• Changed tensor.__array_namespace_info__().capabilities()[]"max dimensions"] to None gh-2071

Fixed

• Refactored code common to accumulation operations (dpt.cumulative_sum, dpt.cumulative_prod, dpt.cumulative_logsumexp) and removed unnecessary event initialization gh-2011
• Fixed incorrect results for dpt.cumulative_sum and dpt.cumulative_prod when dtype=dpt.bool gh-2018
• Fixed a typo in dpctl.SyclPlatform repr gh-2035
• Fixed a bug in tensor.asarray where order="K" could fail to produce an array sufficient for the internal copy operation for some edge cases, including a contiguous array with permuted dimensions gh-2058
• Fixed a typo in dpctl.memory.USMAllocationError gh-2072

Maintenance

• Document dpctl.device_type, dpctl.backend_type, dpctl.event_status_type, and dpctl.global_mem_cache_type enums gh-2019
• Updated SYCL_INCLUDE_DIR_HINT in Conda recipe gh-2039
• Updated expected dtypes in element-wise function docstrings gh-2041, gh-2048
• Set ARRAY_API_TESTS_VERSION=2024.12 when running array API conformity job in CI gh-2046
• Install hwloc when running CI job for nightly SYCL compiler gh-2050
• Added cython-lint to pre-commit to improve style and readability of Cython code gh-2056
• Skip upload jobs when GitHub CI is called from a forked repo gh-2059
• Disable nightly tests run from forked repos gh-2060
• Fixed a typo in beginner's guide example gh-2061
• Updated bandit version gh-2075
• Updated Conda installation instructions gh-2080, gh-2081
• Fixed an incorrect link to changelog in package metadata gh-2085
• Miscellaneous changes to continuous integration/delivery (CI/CD) supporting scripts gh-2020, gh-2034, gh-2043, gh-2044, gh-2065, gh-2066, gh-2068, gh-2070

New Contributors

• @jharlow-intel made their first contribution in #2054
• @david-cortes-intel made their first contribution in #2080

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 ...

v0.18.3

This is a bug fix release which supports use of dpctl in virtual environment on Windows, resolving gh-1745.

v0.18.2

This is a bug-fix release, see https://github.com/IntelPython/dpctl/milestone/15.

It backports fixes for

• tensor.result_type behavior for scalars (see gh-1874) and
• errors when using dpctl in virtual environment on Linux (gh-1892).

Changes from PR gh-1899 were also backported.

v0.18.1

This is incremental release where only installation instructions in README were updated to reflect the change in location of index with Python packages built by Intel(R) relative to 0.18.0 release.

v0.18.0

This release reaches an important milestone of making offloading fully asynchronous.

Calls to dpctl.tensor submit tasks for execution to DPC++ runtime and return without waiting for execution of these tasks to finish.
The sequential semantics a user comes to expect from execution of Python script is preserved though.

The full list of changes that went into this release are:

Added

• Implement tensor.take_along_axis per Python Array API specification gh-1778
• Implement tensor.put_along_axis to complement tensor.take_along_axis gh-1798
• Support for 'device=tensor.kDLCPU' in tensor.from_dlpack function and tensor.usm_ndarray.__dlpack__ method gh-1781
• Support DLPack on Windows gh-1746
• Implement tensor.nextafter function per Python Array API specification gh-1730
• Implement tensor.count_nonzero and tensor.diff functions from Python array API specification gh-1732, gh-1780
• Add support for order="K" to *_like array creation functions, and change default order keyword value from 'C' to 'K' gh-1808
• Support for 'max dimensions' in Array API capabilities info data gh-1774
• Add support for device aspect 'emulated' gh-1691
• dpctl::tensor::usm_memory class defined in dpctl4pybind11.hpp adds constructor to create Python USM memory objects viewing into existing USM allocations, which can be made by an external library gh-1782
• Add support for COVERAGE build type in project's CMake script gh-1692

Change

• Change ownership of USM allocation by dpctl.memory objects, make executions of dpctl.tensor operations asynchronous gh-1705
• Add support for Python scalars by tensor.where function gh-1719
• Optimize division by Python scalar in statistical functions tensor.mean, tensor.std, tensor.var gh-1820
• Use transcendental functions from sycl namespace instead of std namespace gh-1707
• Changes for compatibility with recent NumPy in runtime environment gh-1735, gh-1772, gh-1804
• Array creation function tensor.zeros to use asynchronous memset operation gh-1806
• The setter of tensor.usm_ndarray.shape property now supports Python scalar value gh-1786
• Use 'pyproject.toml' instead of 'setup.py' aligning with current packaging best practices gh-1660
• No longer set SOVERSION property in DPCTLSyclInterface library on Linux gh-1773
• Update version of 'pybind11' used gh-1758, gh-1812
• Handle possible exceptions by usm_host_allocator used with std::vector gh-1791
• Use dpctl::tensor::offset_utils::sycl_free_noexcept instead of sycl::free in host_task tasks associated with life-time management of temporary USM allocations gh-1797
• Add "same_kind"-style casting for in-place mathematical operators of tensor.usm_ndarray gh-1827, gh-1830

Fixed

• Fix setting of release variable Sphinx config file gh-1685
• Handle possible NULL return value from device aspect queries DPCTLDevice_GetMaxWorkGroupSize1d and DPCTLDevice_GetMaxWorkGroupSize2d gh-1690
• Add license header to conda script files gh-1695
• Fix tensor.round behavior on CUDA devices gh-1700
• Add missing #include <sstream> gh-1701
• Fix for issue 1724 gh-1728
• Correct USM type for return array of tensor.extract function gh-1727
• Fix for tensor.unique_all and tensor.unique_inverse to always return index arrays with default indexing data type gh-1741
• Propagate read-only flag from __sycl_usm_array_interface__ in tensor.asarray function gh-1756
• tensor.clip to handle Python scalars which are out of bound for the data type of integral array gh-1759
• Avoid dead-locking by releasing GIL around blocking operations in libtensor gh-1753
• Element-wise tensor.divide and comparison operations allow greater range of Python integer and integer array combinations gh-1771
• Fix for unexpected behavior when using floating point types for array indexing gh-1792
• Enable pytest --pyargs dpctl.tests gh-1833

Maintenance

• Improve performance of test_sort_complex_fp_nan gh-1704
• Improve exception wording raised by tensor.broadcast_arrays() gh-1720
• Remove template keyword in method call of sycl::kernel_bundle gh-1726
• Backport changelog edits from maintenance/0.17.x gh-1736
• Replace uses of 'intel' channels in docs and readme file gh-1737
• Update references to deprecated environment variable SYCL_DEVICE_FILTER gh-1740
• Correction for installation instruction steps gh-1754
• Fix for crash during testing with open source SYCL bundle by updating CPU RT library used gh-1762
• Add missing include to fix build break with newer LLVM gh-1776
• Add #include <utility> for definition of std::move used gh-1787
• Change to CMake script to accomodate DPC++ transition from PI to UR architecture gh-1788
• Document tensor._flags.Flags class gh-1794
• Fix for unreferenced unreleased bug in copy-and-cast code logic gh-1799
• Explicitly include headers used in C++ translation units implementing reduction operations gh-1802
• Clean-up uses of Strided1DIndexer class gh-1805
• Tweak to readability of C++ code implementing matrix-matrix multiplication gh-1810
• Do not add sycl::event associated with compute task to vector of events representing execution of host_task gh-1807
• Remove 'level-zero' conda package from run-time dependencies of 'dpctl' since Intel GPU driver stack now explicitly depends on libze1 package which provides Level-Zero loader library gh-1801, gh-1840
• Use dedicated type-support matrices for in-place element-wise binary operations gh-1816
• Remove recommendation to install wheels from Anaconda PyPI index gh-1819
• Removed use of post-link and pre-unlink conda scripts in dpctl gh-1821
• Pin compiler used to build 0.18.0 version to 2025.0.0 gh-1822
• A varienty of changes to continuous integration/delivery (CI/CD) supporting scripts to keep CI running smoothly:
  gh-1686, gh-1688, gh-1697, gh-1698, gh-1703, gh-1702, gh-1709, gh-1712, gh-1713, gh-1722, gh-1725, gh-1729, gh-1733, [gh-1721](https...

0.17.0

This release features updated documentation web-page https://intelpython.github.io/dpctl/latest/index.html, adds cumulative reductions,
and complies with revision 2023.12 of Python Array API specification.

Added

• Added pybind11 caster for sycl::half to map to/from Python float to "dpctl4pybind11.hpp" header: gh-1655
• Added support for DLPack data interchange per Python Array API 2023.12 specification: gh-1667
• Implemented tensor.cumulative_sum, tensor.cumulative_prod and tensor.cumulative_logsumexp: gh-1602

Changed

• Expanded documentation for dpctl: gh-1619
• Expanded utils.intel_device_info functionality: gh-1656
• Improved performance of elementwise operations: gh-1651
• Efficiency improvement by avoiding unnecessary copying of sycl::queue: gh-1645
• dpctl uses pybind11 2.12.0: gh-1640
• Improved performance of tensor.reshape operation with order="F" when copying is needed, or requested: gh-1677

Fixed

• Fixed initialization of byte type constants in dpctl_capi Python/C API loader class in "dpctl4pybind11.hpp": gh-1665
• Fixed crash in tensor.sort reported for a CPU device and a CUDA device: gh-1676
• Fixed race condition in accumulation kernel for custom operations that caused test failures with AMD CPUs: gh-1624
• Fixed comparison operators for mixed signed and unsigned integral types: gh-1650
• Support use of index arrays of different integral types in indexing operations: gh-47
• Fixed source code to compile for NVidia(TM) GPUs with DPC++ 2024.1: gh-1630
• Corrected tensor.tile for scalar inputs and empty repetitions: gh-1628
• Fixed support for out keyword in tensor.matmul: gh-1610
• Fixed bug in basic slicing of empty arrays: gh-1680
• Fixed bug in tensor.bitwise_invert for boolean input array: gh-1681
• Fixed bug in tensor.repeat on zero-size input arrays: gh-1682

New Contributors

• @bdmoore1 made their first contribution in #1659
• @ekomarova made their first contribution in #1666

Full Changelog: https://github.com/IntelPython/dpctl/blob/master/CHANGELOG.md