[all-commits] [llvm/llvm-project] 4722c6: [openmp] Use core_siblings_list if physical_packag...

[Nikita Popov via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 4722c6b87ca87fb87c9f522cb9decf70cc8b8c2b
      https://github.com/llvm/llvm-project/commit/4722c6b87ca87fb87c9f522cb9decf70cc8b8c2b
  Author: Nikita Popov <npopov at redhat.com>
  Date:   2024-10-14 (Mon, 14 Oct 2024)

  Changed paths:
    M openmp/runtime/src/kmp_affinity.cpp
    M openmp/runtime/test/affinity/kmp-hw-subset.c

  Log Message:
  -----------
  [openmp] Use core_siblings_list if physical_package_id not available (#111831)

On powerpc, physical_package_id may not be available. Currently, this
causes openmp to fall back to flat topology and various affinity tests
fail.

Fix this by parsing core_siblings_list to deterimine which cpus belong
to the same socket. This matches what the testing code does. The code to
parse the CPU list format thankfully already exists.

Fixes https://github.com/llvm/llvm-project/issues/111809.



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