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Changelog for rocThrust

Documentation for rocThrust available at https://rocm.docs.amd.com/projects/rocThrust/en/latest/.

rocThrust 4.0.0 for ROCm 7.0

Changed

  • Updated the required version of Google Benchmark from 1.8.0 to 1.9.0.

Removed

  • device_malloc_allocator.h has been removed. This header file was unused and should not impact users.
  • Removed C++14 support, only C++17 is supported.

Upcoming changes

  • thrust::device_malloc_allocator is deprecated as of this version. It will be removed in an upcoming version.

rocThrust 3.4.0 for ROCm 6.5

Added

  • Added gfx950 support.
  • Merged changes from upstream CCCL/thrust 2.6.0

Known Issues

  • The order of the values being compared by thrust::exclusive_scan_by_key and thrust::inclusive_scan_by_key can change between runs when integers are being compared. This can cause incorrect output when a non-commutative operator such as division is being used.

rocThrust 3.3.0 for ROCm 6.4

Added

  • Added a section to install Thread Building Block (TBB) inside cmake/Dependencies.cmake if TBB is not already available.
  • Made Thread Building Block (TBB) an optional dependency with the new BUILD_HIPSTDPAR_TEST_WITH_TBB flag, default is OFF. When the flag is OFF and TBB is not already on the machine it will compile without TBB. Otherwise is will compile it with TBB.
  • Added extended tests to rtest.py. These tests are extra tests that did not fit the criteria of smoke and regression tests. These tests will take much longer to run relative to smoke and regression tests. Use python rtest.py [--emulation|-e|--test|-t]=extended to run these tests.
  • Added regression tests to rtest.py. These tests recreate scenarios that have caused hardware problems in past emulation environments. Use python rtest.py [--emulation|-e|--test|-t]=regression to run these tests.
  • Added smoke test options, which runs a subset of the unit tests and ensures that less than 2gb of VRAM will be used. Use python rtest.py [--emulation|-e|--test|-t]=smoke to run these tests.
  • Added --emulation option for rtest.py
  • Merged changes from upstream CCCL/thrust 2.4.0
  • Merged changes from upstream CCCL/thrust 2.5.0
  • Added find_first_of to HIPSTDPAR
  • Added search and find_end to HIPSTDPAR
  • Added search_n to HIPSTDPAR
  • Updated HIPSTDPAR's adjacent_find to use rocPRIM's implementation

Changed

  • Changed the C++ version from 14 to 17. C++14 will be deprecated in the next major release.
  • --test|-t is no longer a required flag for rtest.py. Instead, the user can use either --emulation|-e or --test|-t, but not both.
  • Split the contents of HIPSTDPAR's forwarding header into several implementation headers.
  • Fixed copy_if to work with large data types (512 bytes)

Known Issues

  • thrust::inclusive_scan_by_key might produce incorrect results when it's used with -O2 or -O3 optimization.
  • The error is caused by a recent compiler change. There is a fix available that will be released at a later date.

rocThrust 3.2.0 for ROCm 6.3

Added

  • Merged changes from upstream CCCL/thrust 2.3.2
    • Only the NVIDIA backend uses tuple and pair types from libcu++, other backends continue to use the original Thrust implementations and hence do not require libcu++ (CCCL) as a dependency.
  • Added the thrust::hip::par_det execution policy to enable bitwise reproducibility on algorithms that are not bitwise reproducible by default.

Changed

  • Updated the default value for the -a argument from rmake.py to gfx906:xnack-,gfx1030,gfx1100,gfx1101,gfx1102,gfx1151,gfx1200,gfx1201.
  • Enabled the upstream (thrust) test suite for execution by default. It can still be disabled by CMake option -DENABLE_UPSTREAM_TESTS=OFF.

Resolved issues

  • Fixed an issue in rmake.py where the list storing cmake options would contain individual characters instead of a full string of options.
  • Fixed the HIP backend not passing TestCopyIfNonTrivial from the upstream (thrust) test suite.
  • Fixed tests failing when compiled with -D_GLIBCXX_ASSERTIONS=ON.

rocThrust 3.1.0 for ROCm 6.2

Additions

  • Merged changes from upstream CCCL/thrust 2.2.0
    • Updated the contents of system/hip and test with the upstream changes to system/cuda and testing
  • Added HIPSTDPAR library as part of rocThrust.

Changes

  • Updated internal calls to rocprim::detail::invoke_result to use the public API rocprim::invoke_result.
  • Use rocprim::device_adjacent_difference for adjacent_difference API call.
  • Updated internal use of custom iterator in thrust::detail::unique_by_key to use rocPRIM's rocprim::unique_by_key.
  • Updated adjecent_difference to make use of rocprim:adjecent_difference when iterators are comparable and not equal otherwise use rocprim:adjacent_difference_inplace.

Fixes

  • Fixed incorrect implementation of thrust::optional<T&>::emplace().

Known issues

  • thrust::reduce_by_key outputs are not bit-wise reproducible, as run-to-run results for pseudo-associative reduction operators (e.g. floating-point arithmetic operators) are not deterministic on the same device.
  • Note that currently, rocThrust memory allocation is performed in such a way that most algorithmic API functions cannot be called from within hipGraphs.

rocThrust 3.0.0 for ROCm 6.0

Additions

  • Updated to match upstream Thrust 2.0.1
  • NV_IF_TARGET macro from libcu++ for NVIDIA backend and HIP implementation for HIP backend.

Changes

  • The cmake build system now additionally accepts GPU_TARGETS in addition to AMDGPU_TARGETS for setting the targeted gpu architectures. GPU_TARGETS=all will compile for all supported architectures. AMDGPU_TARGETS is only provided for backwards compatibility, GPU_TARGETS should be preferred.
  • Removed cub symlink from the root of the repository.
  • Removed support for deprecated macros (THRUST_DEVICE_BACKEND and THRUST_HOST_BACKEND).

Fixes

  • Fixed a segmentation fault when binary search / upper bound / lower bound / equal range was invoked with hip_rocprim::execute_on_stream_base policy.

Known issues

  • The THRUST_HAS_CUDART macro, which is no longer used in Thrust (it's provided only for legacy support) is replaced with NV_IF_TARGET and THRUST_RDC_ENABLED in the NVIDIA backend. The HIP backend doesn't have a THRUST_RDC_ENABLED macro, so some branches in Thrust code may be unreachable in the HIP backend.

rocThrust 2.18.0 for ROCm 5.7

Fixes

  • lower_bound, upper_bound, and binary_search failed to compile for certain types.
  • Fixed issue where transform_iterator would not compile with __device__-only operators.

Changes

  • Updated docs directory structure to match the standard of rocm-docs-core.
  • Removed references to and workarounds for deprecated hcc

rocThrust 2.17.0 for ROCm 5.5

Additions

  • Updates to match upstream Thrust 1.17.2

Changes

  • partition_copy now uses rocprim::partition_two_way for increased performance

Fixes

  • set_difference and set_intersection no longer hang if the number of items is above UINT_MAX (the unit tests for set_difference and set_intersection used to fail the TestSetDifferenceWithBigIndexes)

rocThrust 2.16.0 for ROCm 5.3

Additions

  • Updates to match upstream Thrust 1.16.0

Changes

  • rocThrust functionality dependent on device malloc is functional (ROCm 5.2 reenabled device malloc); you can now use device launched thrust::sort and thrust::sort_by_key

rocThrust 2.15.0 for ROCm 5.2

Additions

  • Packages for tests and benchmark executables on all supported operating systems using CPack

Known issues

  • async_copy, partition, and stable_sort_by_key unit tests are failing for HIP on Windows

rocThrust 2.14.0 for ROCm 5.1

Additions

  • Updates to match upstream Thrust 1.15.0

Known issues

  • async_copy, partition, and stable_sort_by_key unit tests are failing for HIP on Windows

rocThrust 2.13.0 for ROCm 5.0

Changes

  • Updates to match upstream Thrust 1.13.0
  • Updates to match upstream Thrust 1.14.0
  • Added async scan
  • Scan algorithms: inclusive_scan now uses the input-type as accumulator-type; exclusive_scan uses initial-value-type
    • This changes the behavior of small-size input types with large-size output types (e.g. short input, int output) and low-res input with high-res output (e.g. float input, double output)

rocThrust-2.11.2 for ROCm 4.5.0

Additions

  • Initial HIP on Windows support

Changes

  • Packaging has changed to a development package (called rocthrust-dev for .deb packages and rocthrust-devel for .rpm packages). Because rocThrust is a header-only library, there is no runtime package. To aid in the transition, the development package sets the provides field to rocthrust, so that existing packages that are dependent on rocThrust can continue to work. This provides feature is introduced as a deprecated feature because it will be removed in a future ROCm release.

Known issues

  • async_copy, partition, and stable_sort_by_key unit tests are failing for HIP on Windows
  • Mixed-type exclusive scan algorithm is not using the initial value type for the results type

[rocThrust-2.11.1 for ROCm 4.4.0]

Additions

  • gfx1030 support
  • AddressSanitizer build option

Fixes

  • async_transform unit test failure

[rocThrust-2.11.0 for ROCm 4.3.0]

Additions

  • Updates to match upstream Thrust 1.11
  • gfx90a support
  • gfx803 support re-enabled

[rocThrust-2.10.9 for ROCm 4.2.0]

Additions

  • Updates to match upstream Thrust 1.10

Changes

  • rocThrust now requires CMake version 3.10.2 or greater

Fixes

  • Size zero inputs are now properly handled with newer ROCm builds, which no longer allow zero-size kernel grid/block dimensions
  • Warning of unused results

[rocThrust-2.10.8 for ROCm 4.1.0]

  • There are no changes with this release

[rocThrust-2.10.7 for ROCm 4.0.0]

Additions

  • Updated to upstream Thrust 1.10.0
  • Implemented runtime error for unsupported algorithms and disabled respective tests
  • Updated CMake to use downloaded rocPRIM

[rocThrust-2.10.6 for ROCm 3.10]

Additions

  • copy_if on device test case

Known issues

  • We've disabled ROCm support for device malloc. As a result, rocThrust functionality dependent on device malloc does not work--avoid using device launched thrust::sort and thrust::sort_by_key. Note that Host launched functionality is not impacted.
    • A partial enablement of device malloc is possible by setting HIP_ENABLE_DEVICE_MALLOC to 1.
    • thrust::sort and thrust::sort_by_key may work on certain input sizes but we don't recommended this for production code.

[rocThrust-2.10.5 for ROCm 3.9.0]

Additions

  • Updated to upstream Thrust 1.9.8
  • New test cases for device-side algorithms

Fixes

  • Bug for binary search
  • Implemented workarounds for hipStreamDefault hang

Known issues

  • We've disabled ROCm support for device malloc. As a result, rocThrust functionality dependent on device malloc does not work--avoid using device launched thrust::sort and thrust::sort_by_key. Note that Host launched functionality is not impacted.
    • A partial enablement of device malloc is possible by setting HIP_ENABLE_DEVICE_MALLOC to 1.
    • thrust::sort and thrust::sort_by_key may work on certain input sizes but we don't recommended this for production code.

[rocThrust-2.10.4 for ROCm 3.8.0]

Known issues

  • We've disabled ROCm support for device malloc. As a result, rocThrust functionality dependent on device malloc does not work--avoid using device launched thrust::sort and thrust::sort_by_key. Note that Host launched functionality is not impacted.
    • A partial enablement of device malloc is possible by setting HIP_ENABLE_DEVICE_MALLOC to 1.
    • thrust::sort and thrust::sort_by_key may work on certain input sizes but we don't recommended this for production code.

[rocThrust-2.10.3 for ROCm 3.7.0]

Additions

  • Updated to upstream Thrust 1.9.4

Changes

  • Package dependency has changed to rocPRIM only

Known issues

  • We've disabled ROCm support for device malloc. As a result, rocThrust functionality dependent on device malloc does not work--avoid using device launched thrust::sort and thrust::sort_by_key. Note that Host launched functionality is not impacted.
    • A partial enablement of device malloc is possible by setting HIP_ENABLE_DEVICE_MALLOC to 1.
    • thrust::sort and thrust::sort_by_key may work on certain input sizes but we don't recommended this for production code.

[rocThrust-2.10.2 for ROCm 3.6.0]

Known issues

  • We've disabled ROCm support for device malloc. As a result, rocThrust functionality dependent on device malloc does not work--avoid using device launched thrust::sort and thrust::sort_by_key. Note that Host launched functionality is not impacted.
    • A partial enablement of device malloc is possible by setting HIP_ENABLE_DEVICE_MALLOC to 1.
    • thrust::sort and thrust::sort_by_key may work on certain input sizes but we don't recommended this for production code.

[rocThrust-2.10.1 for ROCm 3.5.0]

Additions

  • Improved tests with fixed and random seeds for test data

Changes

  • CMake searches for rocThrust locally first; if it isn't found, CMake downloads it from GitHub

Deprecations

  • HCC build has been deprecated