v5.0.x: Add opal_clock_gettime() / opal_clock_getres() #9832
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As of Dec 2021, it turns out that CLOCK_MONOTONIC can actually go backwards on macOS (!). Add two simple portable wrappers that use CLOCK_MONOTONIC_RAW on Darwin (which doesn't go backwards) and CLOCK_MONOTONIC everywhere else. Additionally, if the underlying OS does not have clock_gettime(), use gettimeofday() instead. Signed-off-by: Jeff Squyres <jsquyres@cisco.com> (cherry picked from commit c74f80a)
Update MPI_Wtick and MPI_Wtime to use the portable wrappers opal_clock_gettime() and opal_clock_getres(). Signed-off-by: Jeff Squyres <jsquyres@cisco.com> (cherry picked from commit e72b4e6)
bosilca
approved these changes
Jan 4, 2022
bwbarrett
approved these changes
Jan 5, 2022
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This is the v5.0.x PR for master PR #9798.
See individual commit messages for details.