[all-commits] [llvm/llvm-project] 038e66: [OpenMP] Have hidden helper team allocate new OS t...

[Jonathan Peyton via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 038e66fe59962de121ce24ee709eca7a0783cbc4
      https://github.com/llvm/llvm-project/commit/038e66fe59962de121ce24ee709eca7a0783cbc4
  Author: Jonathan Peyton <jonathan.l.peyton at intel.com>
  Date:   2024-03-29 (Fri, 29 Mar 2024)

  Changed paths:
    M openmp/runtime/src/kmp_runtime.cpp
    A openmp/runtime/test/tasking/hidden_helper_task/issue-87117.c

  Log Message:
  -----------
  [OpenMP] Have hidden helper team allocate new OS threads only (#87119)

The hidden helper team pre-allocates the gtid space [1,
num_hidden_helpers] (inclusive). If regular host threads are allocated,
then put back in the thread pool, then the hidden helper team is
initialized, the hidden helper team tries to allocate the threads from
the thread pool with gtids higher than [1, num_hidden_helpers]. Instead,
have the hidden helper team fork OS threads so the correct gtid range
used for hidden helper threads.

Fixes: #87117



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