petsc-3.7.7 2017-09-25

EventRegLogRegister

Registers an event for logging operations in an application code.

Synopsis

#include "petscsys.h"   
PetscErrorCode EventRegLogRegister(PetscEventRegLog eventLog, const char ename[], PetscClassId classid, PetscLogEvent *event)

Not Collective

Input Parameters

	eventLog	- The EventLog
	ename	- The name associated with the event
	classid	- The classid associated to the class for this event

Output Parameter

event -The event

Example of Usage

      int USER_EVENT;
      PetscLogDouble user_event_flops;
      PetscLogEventRegister("User event name",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);

Notes

PETSc can gather data for use with the utilities Jumpshot (part of the MPICH distribution). If PETSc has been compiled with flag -DPETSC_HAVE_MPE (MPE is an additional utility within MPICH), the user can employ another command line option, -log_mpe, to create a logfile, "mpe.log", which can be visualized Jumpshot.

Keywords

log, event, register