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Subject: Re: [OMPI users] SYSTEM CPU with OpenMPI 1.4.3
From: tmishima_at_[hidden]
Date: 2010-11-18 05:19:13


Hi,

I found that ./openmpi-1.4.3/ompi/runtime/ompi_mpi_init.c was changed.
Calling opal_progress_event_users_decrement was deleted as below.

$diff openmpi-1.4.2/ompi/runtime/ompi_mpi_init.c openmpi-1.4.3
/ompi/runtime/ompi_mpi_init.c
813,819d812
< /* Undo ORTE calling opal_progress_event_users_increment() during
< MPI lifetime, to get better latency when not using TCP. Do
< this *after* dyn_init, as dyn init uses lots of ORTE
< communication and we don't want to hinder the performance of
< that code. */
< opal_progress_event_users_decrement();
<

I confirmed that this change affects SYSTEM CPU & performace decrement.
Is it safe to replace the routine with older one?

Anyway, if it's just a mistake, please fix it in the next version.

Regards,
Tetsuya Mishima