PetscLogEventBegin#

Logs the beginning of a user event.

Synopsis#

Not Collective

Input Parameters#

  • e - PetscLogEvent obtained from PetscLogEventRegister()

  • o1 - object associated with the event, or NULL

  • o2 - object associated with the event, or NULL

  • o3 - object associated with the event, or NULL

  • o4 - object associated with the event, or NULL

Fortran Synopsis#

void PetscLogEventBegin(int e, PetscErrorCode ierr)

Example Usage#

  PetscLogEvent USER_EVENT;

  PetscLogDouble user_event_flops;
  PetscLogEventRegister("User event",0, &USER_EVENT);
  PetscLogEventBegin(USER_EVENT, 0, 0, 0, 0);
  [code segment to monitor]
  PetscLogFlops(user_event_flops);
  PetscLogEventEnd(USER_EVENT, 0, 0, 0, 0);

Developer Note#

PetscLogEventBegin() and PetscLogEventBegin() return error codes instead of explicitly handling the errors that occur in the macro directly because other packages that use this macros have used them in their own functions or methods that do not return error codes and it would be disruptive to change the current behavior.

See Also#

Profiling, PetscLogEventRegister(), PetscLogEventEnd(), PetscLogFlops()

Level#

intermediate

Location#

src/sys/logging/plog.c


Index of all Profiling routines
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Index of all manual pages