ompi/mpi_init: lazy-wait during PMIx fence execution #2453
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Relax CPU usage pressure from the application processes when doing modex and barrier in ompi_mpi_init. We see significant latencies in SLURM/pmix plugin barrier progress because app processes are aggressively call opal_progress pushing away daemon process doing collective progress. (ported from 0861884 and 06a73da) Signed-off-by: Artem Polyakov <[email protected]>
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@rhc54 @hppritcha @jladd-mlnx please review |
rhc54
approved these changes
Nov 24, 2016
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Relax CPU usage pressure from the application processes when doing
modex and barrier in ompi_mpi_init.
We see significant latencies in SLURM/pmix plugin barrier progress
because app processes are aggressively call opal_progress pushing
away daemon process doing collective progress.
(ported from 0861884 and 06a73da)
Signed-off-by: Artem Polyakov [email protected]