PetscLogEventSetCollective#

Indicates that a particular event is collective.

Synopsis#

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

Not Collective

Input Parameters#

  • event - The event id

  • collective - Boolean flag indicating whether a particular event is collective

Notes#

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

Collective events are handled specially if the -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

See Also#

PetscLogEventBegin(), PetscLogEventEnd(), PetscLogEventRegister()

Level#

developer

Location#

src/sys/logging/plog.c


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