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RELEASE_NOTES.md

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Release Notes

This document contains changes of oneTBB compared to the last release.

Table of Contents

🎉 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.

🚨 Known Limitations

  • The oneapi::tbb::info namespace interfaces might unexpectedly change the process affinity mask on Windows* OS systems (see open-mpi/hwloc#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 open-mpi/hwloc#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.

🔨 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 uxlfoundation#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

  • Detect the GNU Binutils version to determine WAITPKG support better. Contributed by Martijn Courteaux (uxlfoundation#1347).
  • Fixed the build on non-English locales. Contributed by Vladislav Shchapov (uxlfoundation#1450).
  • Improved Bazel support. Contributed by Julian Amann (uxlfoundation#1434).