PetscLogEventSetCollective#

Indicates that a particular event is collective.

Synopsis#

#include "petscsys.h"   
PetscErrorCode PetscLogEventSetCollective(PetscLogEvent event, PetscBool collective)

Logically Collective

Input Parameters#

event - The event id
collective - PetscBool indicating whether a particular event is collective

Notes#

New events returned from PetscLogEventRegister() are collective by default.

Collective events are handled specially if the command line option -log_sync is used. In that case the logging saves information about two parts of the event; the time for all the MPI ranks to synchronize and then the time for the actual computation/communication to be performed. This option is useful to debug imbalance within the computations or communications.

Level#

developer

Location#

src/sys/logging/plog.c

Index of all Profiling routines
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Index of all manual pages