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oneTBB 2022.3 Release Notes

contrib/libs/tbb/RELEASE_NOTES.md

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oneTBB 2022.3 Release Notes

:rocket: Preview Features

  • Introduced API for setting dynamic task dependencies in task_group. This allows successor tasks to execute only after all their predecessors have completed.

:tada: New Features

  • Extended task_arena with API support for enqueuing functions into a task_group and waiting for the task_group to complete.
  • Introduced API for setting and getting the assertion handler. This allows applications to set their own assertion handling functions.

:rotating_light: Known Limitations

  • The oneapi::tbb::info namespace interfaces might unexpectedly change the process affinity mask on Windows* OS systems (see https://github.com/open-mpi/hwloc/issues/366 for details) when using hwloc version lower than 2.5.
  • Using a hwloc version other than 1.11, 2.0, or 2.5 may cause an undefined behavior on Windows OS. See https://github.com/open-mpi/hwloc/issues/477 for details.
  • The NUMA topology may be detected incorrectly on Windows* OS machines where the number of NUMA node threads exceeds the size of 1 processor group.
  • On Windows OS on ARM64*, when compiling an application using oneTBB with the Microsoft* Compiler, the compiler issues a warning C4324 that a structure was padded due to the alignment specifier. Consider suppressing the warning by specifying /wd4324 to the compiler command line.
  • C++ exception handling mechanism on Windows* OS on ARM64* might corrupt memory if an exception is thrown from any oneTBB parallel algorithm (see Windows* OS on ARM64* compiler issue: https://developercommunity.visualstudio.com/t/ARM64-incorrect-stack-unwinding-for-alig/1544293.
  • When CPU resource coordination is enabled by setting the TCM_ENABLE environment variable to 1, tasks from a lower-priority task_arena might be executed before tasks from a higher-priority task_arena.
  • When CPU resource coordination is enabled, cgroups CPU quota and period limitations settings are ignored.
  • Using oneTBB on WASM* may cause applications to run in a single thread. See Limitations of WASM Support.

NOTE: To see known limitations that impact all versions of oneTBB, refer to oneTBB Documentation.

:hammer: Issues Fixed

:octocat: Open-Source Contributions Integrated

oneTBB 2022.2 Release Notes

:tada: New Features

  • Improved Hybrid CPU and NUMA Platforms API Support: Enhanced API availability for better compatibility with Hybrid CPU and NUMA platforms.
  • Added support for verifying signatures of dynamic dependencies at runtime. To enable this feature, specify -DTBB_VERIFY_DEPENDENCY_SIGNATURE=ON when invoking CMake.
  • Added support for printing warning messages about issues in dynamic dependency loading. To see these messages in the console, build the library with the TBB_DYNAMIC_LINK_WARNING macro defined.
  • Added a Natvis file for custom visualization of TBB containers when debugging with Microsoft* Visual Studio.
  • Refined Environment Setup: Replaced CPATH with C_INCLUDE_PATH and CPLUS_INCLUDE_PATH in environment setup to avoid unintended compiler warnings caused by globally applied include paths.

:rotating_light: Known Limitations

  • The oneapi::tbb::info namespace interfaces might unexpectedly change the process affinity mask on Windows* OS systems (see https://github.com/open-mpi/hwloc/issues/366 for details) when using hwloc version lower than 2.5.
  • Using a hwloc version other than 1.11, 2.0, or 2.5 may cause an undefined behavior on Windows OS. See https://github.com/open-mpi/hwloc/issues/477 for details.
  • The NUMA topology may be detected incorrectly on Windows* OS machines where the number of NUMA node threads exceeds the size of 1 processor group.
  • On Windows OS on ARM64*, when compiling an application using oneTBB with the Microsoft* Compiler, the compiler issues a warning C4324 that a structure was padded due to the alignment specifier. Consider suppressing the warning by specifying /wd4324 to the compiler command line.
  • C++ exception handling mechanism on Windows* OS on ARM64* might corrupt memory if an exception is thrown from any oneTBB parallel algorithm (see Windows* OS on ARM64* compiler issue: https://developercommunity.visualstudio.com/t/ARM64-incorrect-stack-unwinding-for-alig/1544293.
  • When CPU resource coordination is enabled, tasks from a lower-priority task_arena might be executed before tasks from a higher-priority task_arena.
  • Using oneTBB on WASM* may cause applications to run in a single thread. See Limitations of WASM Support.

NOTE: To see known limitations that impact all versions of oneTBB, refer to oneTBB Documentation.

:octocat: Open-Source Contributions Integrated

oneTBB 2022.1 Release Notes

:tada: New Features

  • The oneTBB repository migrated to the new UXL Foundation organization.
  • blocked_nd_range is now a fully supported feature.
  • Introduced the ONETBB_SPEC_VERSION macro to specify the version of oneAPI specification implemented by the current version of the library.

:rocket: Preview Features

  • Added the explicit deduction guides to blocked_nd_range to support C++17 Class Template Argument Deduction.
  • Extended task_arena API to select TBB workers leave policy and to hint the start and the end of parallel computations.

:rotating_light: Known Limitations

  • The oneapi::tbb::info namespace interfaces might unexpectedly change the process affinity mask on Windows* OS systems (see https://github.com/open-mpi/hwloc/issues/366 for details) when using hwloc version lower than 2.5.
  • Using a hwloc version other than 1.11, 2.0, or 2.5 may cause an undefined behavior on Windows OS. See https://github.com/open-mpi/hwloc/issues/477 for details.
  • The NUMA topology may be detected incorrectly on Windows* OS machines where the number of NUMA node threads exceeds the size of 1 processor group.
  • On Windows OS on ARM64*, when compiling an application using oneTBB with the Microsoft* Compiler, the compiler issues a warning C4324 that a structure was padded due to the alignment specifier. Consider suppressing the warning by specifying /wd4324 to the compiler command line.
  • C++ exception handling mechanism on Windows* OS on ARM64* might corrupt memory if an exception is thrown from any oneTBB parallel algorithm (see Windows* OS on ARM64* compiler issue: https://developercommunity.visualstudio.com/t/ARM64-incorrect-stack-unwinding-for-alig/1544293.
  • When CPU resource coordination is enabled, tasks from a lower-priority task_arena might be executed before tasks from a higher-priority task_arena.
  • Using oneTBB on WASM* may cause applications to run in a single thread. See Limitations of WASM Support.

NOTE: To see known limitations that impact all versions of oneTBB, refer to oneTBB Documentation.

:hammer: Issues Fixed

:octocat: Open-Source Contributions Integrated

oneTBB 2022.0 Release Notes

:rocket: Preview Features

  • Extended the Flow Graph receiving nodes with a new try_put_and_wait API that submits a message to the graph and waits for its completion.

:rotating_light: Known Limitations

  • The oneapi::tbb::info namespace interfaces might unexpectedly change the process affinity mask on Windows* OS systems (see https://github.com/open-mpi/hwloc/issues/366 for details) when using hwloc version lower than 2.5.
  • Using a hwloc version other than 1.11, 2.0, or 2.5 may cause an undefined behavior on Windows OS. See https://github.com/open-mpi/hwloc/issues/477 for details.
  • The NUMA topology may be detected incorrectly on Windows* OS machines where the number of NUMA node threads exceeds the size of 1 processor group.
  • On Windows OS on ARM64*, when compiling an application using oneTBB with the Microsoft* Compiler, the compiler issues a warning C4324 that a structure was padded due to the alignment specifier. Consider suppressing the warning by specifying /wd4324 to the compiler command line.
  • C++ exception handling mechanism on Windows* OS on ARM64* might corrupt memory if an exception is thrown from any oneTBB parallel algorithm (see Windows* OS on ARM64* compiler issue: https://developercommunity.visualstudio.com/t/ARM64-incorrect-stack-unwinding-for-alig/1544293.
  • When CPU resource coordination is enabled, tasks from a lower-priority task_arena might be executed before tasks from a higher-priority task_arena.
  • Using oneTBB on WASM*, may cause applications to run in a single thread. See Limitations of WASM Support.

NOTE: To see known limitations that impact all versions of oneTBB, refer to oneTBB Documentation.

:hammer: Issues Fixed

  • Fixed the missed signal for thread request for enqueue operation.
  • Significantly improved scalability of task_group, flow_graph, and parallel_for_each.
  • Removed usage of std::aligned_storage deprecated in C++23 (Inspired by Valery Matskevich https://github.com/oneapi-src/oneTBB/pull/1394).
  • Fixed the issue where oneapi::tbb::info interfaces might interfere with the process affinity mask on the Windows* OS systems with multiple processor groups.

:octocat: Open-Source Contributions Integrated

oneTBB 2021.13 Release Notes

:tada: New Features

:rotating_light: Known Limitations

  • The oneapi::tbb::info namespace interfaces might unexpectedly change the process affinity mask on Windows* OS systems (see https://github.com/open-mpi/hwloc/issues/366 for details) when using hwloc version lower than 2.5.
  • Using a hwloc version other than 1.11, 2.0, or 2.5 may cause an undefined behavior on Windows OS. See https://github.com/open-mpi/hwloc/issues/477 for details.
  • The NUMA topology may be detected incorrectly on Windows* OS machines where the number of NUMA node threads exceeds the size of 1 processor group.
  • On Windows OS on ARM64*, when compiling an application using oneTBB with the Microsoft* Compiler, the compiler issues a warning C4324 that a structure was padded due to the alignment specifier. Consider suppressing the warning by specifying /wd4324 to the compiler command line.
  • C++ exception handling mechanism on Windows* OS on ARM64* might corrupt memory if an exception is thrown from any oneTBB parallel algorithm (see Windows* OS on ARM64* compiler issue: https://developercommunity.visualstudio.com/t/ARM64-incorrect-stack-unwinding-for-alig/1544293.
  • When CPU resource coordination is enabled, tasks from a lower-priority task_arena might be executed before tasks from a higher-priority task_arena.
  • Using oneTBB on WASM* may cause applications to run in a single thread. See Limitations of WASM Support.

NOTE: To see known limitations that impact all versions of oneTBB, refer to oneTBB Documentation.

:hammer: Issues Fixed

  • Improved security by excluding CWD from search of load-time dependencies.
  • Improved performance on Apple* platforms by aligning block-time behavior with other OS.
  • Improved performance on non-hybrid CPU hardware by reworking block-time behavior.
  • Improved performance on ARM64 platform by fixing backoff behavior for spin loops.
  • Improved performance when constraints API is used on server CPU HW with multiple NUMA nodes.

:octocat: Open-Source Contributions Integrated

oneTBB 2021.12 Release Notes

:rotating_light: Known Limitations

  • The oneapi::tbb::info namespace interfaces might unexpectedly change the process affinity mask on Windows* OS systems (see https://github.com/open-mpi/hwloc/issues/366 for details) when using hwloc version lower than 2.5.
  • Using a hwloc version other than 1.11, 2.0, or 2.5 may cause an undefined behavior on Windows OS. See https://github.com/open-mpi/hwloc/issues/477 for details.
  • The NUMA topology may be detected incorrectly on Windows* OS machines where the number of NUMA node threads exceeds the size of 1 processor group.
  • On Windows OS on ARM64*, when compiling an application using oneTBB with the Microsoft* Compiler, the compiler issues a warning C4324 that a structure was padded due to the alignment specifier. Consider suppressing the warning by specifying /wd4324 to the compiler command line.
  • C++ exception handling mechanism on Windows* OS on ARM64* might corrupt memory if an exception is thrown from any oneTBB parallel algorithm (see Windows* OS on ARM64* compiler issue: https://developercommunity.visualstudio.com/t/ARM64-incorrect-stack-unwinding-for-alig/1544293.
  • When CPU resource coordination is enabled, tasks from a lower-priority task_arena might be executed before tasks from a higher-priority task_arena.

NOTE: To see known limitations that impact all versions of oneTBB, refer to oneTBB Documentation.

:hammer: Issues Fixed

  • Fixed parallel_for_each algorithm behavior for iterators defining iterator_concept trait instead of iterator_category.
  • Fixed the redefinition issue for std::min and std::max on Windows* OS (GitHub* #832).
  • Fixed the incorrect binary search order in TBBConfig.cmake.
  • Enabled the oneTBB library search using the pkg-config tool in Conda packages.

:octocat: Open-Source Contributions Integrated

oneTBB 2021.11 Release Notes

:rotating_light: Known Limitations

  • The oneapi::tbb::info namespace interfaces might unexpectedly change the process affinity mask on Windows* OS systems (see https://github.com/open-mpi/hwloc/issues/366 for details) when using hwloc version lower than 2.5.
  • Using a hwloc version other than 1.11, 2.0, or 2.5 may cause an undefined behavior on Windows OS. See https://github.com/open-mpi/hwloc/issues/477 for details.
  • The NUMA topology may be detected incorrectly on Windows* OS machines where the number of NUMA node threads exceeds the size of 1 processor group.
  • On Windows OS on ARM64*, when compiling an application using oneTBB with the Microsoft* Compiler, the compiler issues a warning C4324 that a structure was padded due to the alignment specifier. Consider suppressing the warning by specifying /wd4324 to the compiler command line.
  • C++ exception handling mechanism on Windows* OS on ARM64* might corrupt memory if an exception is thrown from any oneTBB parallel algorithm (see Windows* OS on ARM64* compiler issue: https://developercommunity.visualstudio.com/t/ARM64-incorrect-stack-unwinding-for-alig/1544293).
  • Using TBBConfig.cmake in 32-bit environment may cause incorrect linkage with 64-bit oneTBB library. As a workaround, set CMAKE_PREFIX_PATH:
    • On Linux* OS: to TBBROOT/lib32/
    • On Windows* OS: to TBBROOT/lib32/;TBBROOT/bin32/

NOTE: To see known limitations that impact all versions of oneTBB, refer to oneTBB Documentation.

:hammer: Issues Fixed

  • Fixed tbb::this_task_arena() behavior for specific tbb::task_arena{1,0}.
  • Restored performance on systems with a high number of CPU cores that support _tpause.

oneTBB 2021.10 Release Notes

:tada: New Features

  • Since C++17, parallel algorithms and Flow Graph nodes are allowed to accept pointers to the member functions and member objects as the user-provided callables.
  • Added missed member functions, such as assignment operators and swap function, to the concurrent_queue and concurrent_bounded_queue containers.

:rotating_light: Known Limitations

  • A static assert will cause compilation failures in oneTBB headers when compiling with clang 12.0.0 or newer if using the LLVM standard library with -ffreestanding and C++11/14 compiler options.
  • An application using Parallel STL algorithms in libstdc++ versions 9 and 10 may fail to compile due to incompatible interface changes between earlier versions of Threading Building Blocks (TBB) and oneAPI Threading Building Blocks (oneTBB). Disable support for Parallel STL algorithms by defining PSTL_USE_PARALLEL_POLICIES (in libstdc++ 9) or _GLIBCXX_USE_TBB_PAR_BACKEND (in libstdc++ 10) macro to zero before inclusion of the first standard header file in each translation unit.
  • On Linux* OS, if oneAPI Threading Building Blocks (oneTBB) or Threading Building Blocks (TBB) are installed in a system folder like /usr/lib64, the application may fail to link due to the order in which the linker searches for libraries. Use the -L linker option to specify the correct location of oneTBB library. This issue does not affect the program execution.
  • The oneapi::tbb::info namespace interfaces might unexpectedly change the process affinity mask on Windows* OS systems (see https://github.com/open-mpi/hwloc/issues/366 for details) when using hwloc* version lower than 2.5.
  • Using a hwloc* version other than 1.11, 2.0, or 2.5 may cause an undefined behavior on Windows* OS. See https://github.com/open-mpi/hwloc/issues/477 for details.
  • The NUMA* topology may be detected incorrectly on Windows* OS machines where the number of NUMA* node threads exceeds the size of 1 processor group.
  • On Windows* OS on ARM64*, when compiling an application using oneTBB with the Microsoft* Compiler, the compiler issues a warning C4324 that a structure was padded due to the alignment specifier. Consider suppressing the warning by specifying /wd4324 to the compiler command line.
  • oneTBB does not support fork(), to work-around the issue, consider using task_scheduler_handle to join oneTBB worker threads before using fork().
  • C++ exception handling mechanism on Windows* OS on ARM64* might corrupt memory if an exception is thrown from any oneTBB parallel algorithm (see Windows* OS on ARM64* compiler issue: https://developercommunity.visualstudio.com/t/ARM64-incorrect-stack-unwinding-for-alig/1544293).

:hammer: Issues Fixed

  • Fixed the hang in the reserve method of concurrent unordered containers (GitHub* #1056).
  • Fixed the C++20 three-way comparison feature detection (GitHub* #1093).
  • Fixed oneTBB integration with CMake* in the Conda* environment.

oneTBB 2021.9 Release Notes

:tada: New Features

  • Hybrid CPU support is now a fully supported feature.

:rotating_light: Known Limitations

  • A static assert will cause compilation failures in oneTBB headers when compiling with clang 12.0.0 or newer if using the LLVM standard library with -ffreestanding and C++11/14 compiler options.
  • An application using Parallel STL algorithms in libstdc++ versions 9 and 10 may fail to compile due to incompatible interface changes between earlier versions of Threading Building Blocks (TBB) and oneAPI Threading Building Blocks (oneTBB). Disable support for Parallel STL algorithms by defining PSTL_USE_PARALLEL_POLICIES (in libstdc++ 9) or _GLIBCXX_USE_TBB_PAR_BACKEND (in libstdc++ 10) macro to zero before inclusion of the first standard header file in each translation unit.
  • On Linux* OS, if oneAPI Threading Building Blocks (oneTBB) or Threading Building Blocks (TBB) are installed in a system folder like /usr/lib64, the application may fail to link due to the order in which the linker searches for libraries. Use the -L linker option to specify the correct location of oneTBB library. This issue does not affect the program execution.
  • The oneapi::tbb::info namespace interfaces might unexpectedly change the process affinity mask on Windows* OS systems (see https://github.com/open-mpi/hwloc/issues/366 for details) when using hwloc version lower than 2.5.
  • Using a hwloc version other than 1.11, 2.0, or 2.5 may cause an undefined behavior on Windows OS. See https://github.com/open-mpi/hwloc/issues/477 for details.
  • The NUMA topology may be detected incorrectly on Windows OS machines where the number of NUMA node threads exceeds the size of 1 processor group.
  • On Windows OS on ARM64*, when compiling an application using oneTBB with the Microsoft* Compiler, the compiler issues a warning C4324 that a structure was padded due to the alignment specifier. Consider suppressing the warning by specifying /wd4324 to the compiler command line.
  • oneTBB does not support fork(), to work-around the issue, consider using task_scheduler_handle to join oneTBB worker threads before using fork().
  • C++ exception handling mechanism on Windows* OS on ARM64* might corrupt memory if an exception is thrown from any oneTBB parallel algorithm (see Windows* OS on ARM64* compiler issue: https://developercommunity.visualstudio.com/t/ARM64-incorrect-stack-unwinding-for-alig/1544293).

:hammer: Issues Fixed

  • Improved robustness of thread creation algorithm on Linux* OS.
  • Enabled full support of Thread Sanitizer on macOS*
  • Fixed the issue with destructor calls for uninitialized objects in oneapi::tbb::parallel_for_each algorithm (GitHub* #691)
  • Fixed the issue with tbb::concurrent_lru_cache when items history capacity is zero (GitHub* #265)
  • Fixed compilation issues on modern GCC* versions

:octocat: Open-Source Contributions Integrated

oneTBB 2021.8 Release Notes

:rotating_light: Known Limitations

  • A static assert causes compilation failures in oneTBB headers when compiling with Clang* 12.0.0 or newer if using the LLVM* standard library with -ffreestanding and C++11/14 compiler options.
  • An application using Parallel STL algorithms in libstdc++ versions 9 and 10 may fail to compile due to incompatible interface changes between earlier versions of Threading Building Blocks (TBB) and oneAPI Threading Building Blocks (oneTBB). Disable support for Parallel STL algorithms by defining PSTL_USE_PARALLEL_POLICIES (in libstdc++ 9) or _GLIBCXX_USE_TBB_PAR_BACKEND (in libstdc++ 10) macro to zero before inclusion of the first standard header file in each translation unit.
  • On Linux* OS, if oneAPI Threading Building Blocks (oneTBB) or Threading Building Blocks (TBB) are installed in a system folder like /usr/lib64, the application may fail to link due to the order in which the linker searches for libraries. Use the -L linker option to specify the correct location of oneTBB library. This issue does not affect the program execution.
  • The oneapi::tbb::info namespace interfaces might unexpectedly change the process affinity mask on Windows* OS systems (see https://github.com/open-mpi/hwloc/issues/366 for details) when using hwloc version lower than 2.5.
  • Using a hwloc version other than 1.11, 2.0, or 2.5 may cause an undefined behavior on Windows* OS. See https://github.com/open-mpi/hwloc/issues/477 for details.
  • The NUMA topology may be detected incorrectly on Windows OS machines where the number of NUMA node threads exceeds the size of 1 processor group.
  • On Windows OS on ARM64*, when compiling an application using oneTBB with the Microsoft* Compiler, the compiler issues a warning C4324 that a structure was padded due to the alignment specifier. Consider suppressing the warning by specifying /wd4324 to the compiler command line.
  • oneTBB does not support fork(), to work-around the issue, consider using task_scheduler_handle to join oneTBB worker threads before using fork().
  • C++ exception handling mechanism on Windows* OS on ARM64* might corrupt memory if an exception is thrown from any oneTBB parallel algorithm (see Windows* OS on ARM64* compiler issue: https://developercommunity.visualstudio.com/t/ARM64-incorrect-stack-unwinding-for-alig/1544293).

:hammer: Issues Fixed

  • Fixed oneapi::tbb::concurrent_bounded_queue::pop return type (GitHub* #807).
  • Fixed oneapi::tbb::concurrent_queue and oneapi::tbb::concurrent_bounded_queue with non-default constructible value types (GitHub* #885).
  • Fixed incorrect splitting of iteration space in case there is no support for proportional splitting in custom ranges.

:octocat: Open-Source Contributions Integrated

oneTBB 2021.7 Release Notes

:rotating_light: Known Limitations

  • A static assert causes compilation failures in oneTBB headers when compiling with Clang* 12.0.0 or newer if using the LLVM* standard library with -ffreestanding and C++11/14 compiler options.
  • An application using Parallel STL algorithms in libstdc++ versions 9 and 10 may fail to compile due to incompatible interface changes between earlier versions of Threading Building Blocks (TBB) and oneAPI Threading Building Blocks (oneTBB). Disable support for Parallel STL algorithms by defining PSTL_USE_PARALLEL_POLICIES (in libstdc++ 9) or _GLIBCXX_USE_TBB_PAR_BACKEND (in libstdc++ 10) macro to zero before inclusion of the first standard header file in each translation unit.
  • On Linux* OS, if oneAPI Threading Building Blocks (oneTBB) or Threading Building Blocks (TBB) are installed in a system folder like /usr/lib64, the application may fail to link due to the order in which the linker searches for libraries. Use the -L linker option to specify the correct location of oneTBB library. This issue does not affect the program execution.
  • The oneapi::tbb::info namespace interfaces might unexpectedly change the process affinity mask on Windows* OS systems (see https://github.com/open-mpi/hwloc/issues/366 for details) when using hwloc version lower than 2.5.
  • Using a hwloc version other than 1.11, 2.0, or 2.5 may cause an undefined behavior on Windows* OS. See https://github.com/open-mpi/hwloc/issues/477 for details.
  • The NUMA topology may be detected incorrectly on Windows OS machines where the number of NUMA node threads exceeds the size of 1 processor group.
  • On Windows OS on ARM64*, when compiling an application using oneTBB with the Microsoft* Compiler, the compiler issues a warning C4324 that a structure was padded due to the alignment specifier. Consider suppressing the warning by specifying /wd4324 to the compiler command line.
  • oneTBB does not support fork(), to work-around the issue, consider using task_scheduler_handle to join oneTBB worker threads before using fork().
  • C++ exception handling mechanism on Windows* OS on ARM64* might corrupt memory if an exception is thrown from any oneTBB parallel algorithm (see Windows* OS on ARM64* compiler issue: https://developercommunity.visualstudio.com/t/ARM64-incorrect-stack-unwinding-for-alig/1544293).

:hammer: Issues Fixed

  • Memory allocator crash when allocating ~1TB on 64-bit systems (GitHub* #838).
  • Fixed thread distribution over NUMA nodes on Windows* OS systems.
  • For oneapi::tbb::suspend, it is guaranteed that the user-specified callable object is executed by the calling thread.

:octocat: Open-Source Contributions Integrated

oneTBB 2021.6 Release Notes

:tada: New Features

  • Improved support and use of the latest C++ standards for parallel_sort that allows using this algorithm with user-defined and standard library-defined objects with modern semantics.
  • The following features are now fully functional: task_arena extensions, collaborative_call_once, adaptive mutexes, heterogeneous overloads for concurrent_hash_map, and task_scheduler_handle.
  • Added support for Windows* Server 2022 and Python 3.10.

:rotating_light: Known Limitations

  • An application using Parallel STL algorithms in libstdc++ versions 9 and 10 may fail to compile due to incompatible interface changes between earlier versions of Threading Building Blocks (TBB) and oneAPI Threading Building Blocks (oneTBB). Disable support for Parallel STL algorithms by defining PSTL_USE_PARALLEL_POLICIES (in libstdc++ 9) or _GLIBCXX_USE_TBB_PAR_BACKEND (in libstdc++ 10) macro to zero before inclusion of the first standard header file in each translation unit.
  • On Linux* OS, if oneAPI Threading Building Blocks (oneTBB) or Threading Building Blocks (TBB) are installed in a system folder like /usr/lib64, the application may fail to link due to the order in which the linker searches for libraries. Use the -L linker option to specify the correct location of oneTBB library. This issue does not affect the program execution.
  • The oneapi::tbb::info namespace interfaces might unexpectedly change the process affinity mask on Windows* OS systems (see https://github.com/open-mpi/hwloc/issues/366 for details) when using hwloc version lower than 2.5.
  • Using a hwloc version other than 1.11, 2.0, or 2.5 may cause an undefined behavior on Windows OS. See https://github.com/open-mpi/hwloc/issues/477 for details.
  • The NUMA topology may be detected incorrectly on Windows OS machines where the number of NUMA node threads exceeds the size of 1 processor group.
  • On Windows OS on ARM64*, when compiling an application using oneTBB with the Microsoft* Compiler, the compiler issues a warning C4324 that a structure was padded due to the alignment specifier. Consider suppressing the warning by specifying /wd4324 to the compiler command line.
  • oneTBB does not support fork(), to work-around the issue, consider using task_scheduler_handle to join oneTBB worker threads before using fork().
  • C++ exception handling mechanism on Windows* OS on ARM64* might corrupt memory if an exception is thrown from any oneTBB parallel algorithm (see Windows* OS on ARM64* compiler issue: https://developercommunity.visualstudio.com/t/ARM64-incorrect-stack-unwinding-for-alig/1544293).

:hammer: Issues Fixed

  • Memory allocator crash on a system with an incomplete /proc/meminfo (GitHub* #584).
  • Incorrect blocking of task stealing (GitHub* #478).
  • Hang due to incorrect decrement of a limiter_node (GitHub* #634).
  • Memory corruption in some rare cases when passing big messages in a flow graph (GitHub* #639).
  • Possible deadlock in a throwable flow graph node with a lightweight policy. The lightweight policy is now ignored for functors that can throw exceptions (GitHub* #420).
  • Crash when obtaining a range from empty ordered and unordered containers (GitHub* #641).
  • Deadlock in a concurrent_vector resize() that could happen when the new size is less than the previous size (GitHub* #733).

:octocat: Open-Source Contributions Integrated

oneTBB 2021.5 Release Notes

:rocket: Preview Features

  • Extended task_group interface with a new run_and_wait overload to accept task_handle.

:tada: New Features

  • Enabled Microsoft Visual Studio* 2022 and Python 3.9 support.

:rotating_light: Known Limitations

  • An application using Parallel STL algorithms in libstdc++ versions 9 and 10 may fail to compile due to incompatible interface changes between earlier versions of Threading Building Blocks (TBB) and oneAPI Threading Building Blocks (oneTBB). Disable support for Parallel STL algorithms by defining PSTL_USE_PARALLEL_POLICIES (in libstdc++ 9) or _GLIBCXX_USE_TBB_PAR_BACKEND (in libstdc++ 10) macro to zero before inclusion of the first standard header file in each translation unit.
  • On Linux* OS, if oneAPI Threading Building Blocks (oneTBB) or Threading Building Blocks (TBB) are installed in a system folder like /usr/lib64, the application may fail to link due to the order in which the linker searches for libraries. Use the -L linker option to specify the correct location of oneTBB library. This issue does not affect the program execution.
  • The oneapi::tbb::info namespace interfaces might unexpectedly change the process affinity mask on Windows* OS systems (see https://github.com/open-mpi/hwloc/issues/366 for details) when using hwloc version lower than 2.5.
  • Using a hwloc version other than 1.11, 2.0, or 2.5 may cause an undefined behavior on Windows OS. See https://github.com/open-mpi/hwloc/issues/477 for details.
  • The NUMA topology may be detected incorrectly on Windows OS machines where the number of NUMA node threads exceeds the size of 1 processor group.
  • On Windows OS on ARM64*, when compiling an application using oneTBB with the Microsoft* Compiler, the compiler issues a warning C4324 that a structure was padded due to the alignment specifier. Consider suppressing the warning by specifying /wd4324 to the compiler command line.
  • oneTBB does not support fork(), to work-around the issue, consider using task_scheduler_handle to join oneTBB worker threads before using fork().
  • C++ exception handling mechanism on Windows* OS on ARM64* might corrupt memory if an exception is thrown from any oneTBB parallel algorithm (see Windows* OS on ARM64* compiler issue: https://developercommunity.visualstudio.com/t/ARM64-incorrect-stack-unwinding-for-alig/1544293).

:hammer: Issues Fixed

  • Reworked synchronization mechanism to reduce contention when multiple task_arena's are used concurrently.
  • Fixed possible correctness issue in queuing_rw_mutex on non-Intel platforms.
  • Fixed GCC* 11 warnings.
  • Fixed sporadic memory corruption.

oneTBB 2021.4 Release Notes

:rocket: Preview Features

  • Introduced the collaborative_call_once algorithm that executes the callable object exactly once, but allows other threads to join oneTBB parallel construction used inside this callable object. Inspired by Ben FrantzDale and Henry Heffan.

:rotating_light: Known Limitations

  • An application using Parallel STL algorithms in libstdc++ versions 9 and 10 may fail to compile due to incompatible interface changes between earlier versions of Threading Building Blocks (TBB) and oneAPI Threading Building Blocks (oneTBB). Disable support for Parallel STL algorithms by defining PSTL_USE_PARALLEL_POLICIES (in libstdc++ 9) or _GLIBCXX_USE_TBB_PAR_BACKEND (in libstdc++ 10) macro to zero before inclusion of the first standard header file in each translation unit.
  • On Linux* OS, if oneAPI Threading Building Blocks (oneTBB) or Threading Building Blocks (TBB) are installed in a system folder like /usr/lib64, the application may fail to link due to the order in which the linker searches for libraries. Use the -L linker option to specify the correct location of oneTBB library. This issue does not affect the program execution.
  • The oneapi::tbb::info namespace interfaces might unexpectedly change the process affinity mask on Windows* OS systems (see https://github.com/open-mpi/hwloc/issues/366 for details) when using hwloc version lower than 2.5.
  • Using a hwloc version other than 1.11, 2.0, or 2.5 may cause an undefined behavior on Windows OS. See https://github.com/open-mpi/hwloc/issues/477 for details.
  • The NUMA topology may be detected incorrectly on Windows OS machines where the number of NUMA node threads exceeds the size of 1 processor group.
  • On Windows OS on ARM64*, when compiling an application using oneTBB with the Microsoft* Compiler, the compiler issues a warning C4324 that a structure was padded due to the alignment specifier. Consider suppressing the warning by specifying /wd4324 to the compiler command line.
  • oneTBB does not support fork(), to work-around the issue, consider using task_scheduler_handle to join oneTBB worker threads before using fork().

:hammer: Issues Fixed

  • Enabled full support of Address Sanitizer and Thread Sanitizer.
  • Fixed a race condition in tbbmalloc that may cause a crash in realloc() when using tbbmalloc_proxy.
  • Enabled GCC* 11 support.
  • Fixed limiter_node behavior when an integral type is used as an argument for the DecrementType template parameter.
  • Fixed a possible memory leak when the static or affinity partitioners are used.
  • Fixed possible system oversubscription when using a process mask and an explicit number of threads in the task arena.

:octocat: Open-Source Contributions Integrated