1: /*$Id: ex3.c,v 1.39 2001/03/23 23:21:03 balay Exp $*/

  3: static char help[] = "Augmenting PETSc profiling by add events.n
  4: Run this program with one of then
  5: following options to generate logging information:  -log, -log_summary,n
  6: -log_all.  The PETSc routines automatically log event times and flops,n
  7: so this monitoring is intended solely for users to employ in applicationn
  8: codes.  Note that the code must be compiled with the flag -DPETSC_USE_LOGn
  9: (the default) to activate logging.nn";

 11: /*T
 12:    Concepts: PetscLog^user-defined event profiling
 13:    Concepts: profiling^user-defined event
 14:    Concepts: PetscLog^activating/deactivating events for profiling
 15:    Concepts: profiling^activating/deactivating events
 16:    Processors: n
 17: T*/

 19: /* 
 20:   Include "petsc.h" so that we can use PETSc profiling routines.
 21: */
 22:  #include petsc.h

 24: #undef __FUNCT__
 26: int main(int argc,char **argv)
 27: {
 28:   int i,ierr,imax=10000,icount,USER_EVENT;

 30:   PetscInitialize(&argc,&argv,(char *)0,help);

 32:   /* 
 33:      Create a new user-defined event.
 34:       - Note that PetscLogEventRegister() returns to the user a unique
 35:         integer event number, which should then be used for profiling
 36:         the event via PetscLogEventBegin() and PetscLogEventEnd().
 37:       - The user can also optionally log floating point operations
 38:         with the routine PetscLogFlops().
 39:   */
 40:   PetscLogEventRegister(&USER_EVENT,"User event",PETSC_VIEWER_COOKIE);
 41:   PetscLogEventBegin(USER_EVENT,0,0,0,0);
 42:   icount = 0;
 43:   for (i=0; i<imax; i++) icount++;
 44:   PetscLogFlops(imax);
 45:   PetscSleep(1);
 46:   PetscLogEventEnd(USER_EVENT,0,0,0,0);

 48:   /* 
 49:      We disable the logging of an event.

 51:   */
 52:   PetscLogEventDeactivate(USER_EVENT);
 53:   PetscLogEventBegin(USER_EVENT,0,0,0,0);
 54:   PetscSleep(1);
 55:   PetscLogEventEnd(USER_EVENT,0,0,0,0);

 57:   /* 
 58:      We next enable the logging of an event
 59:   */
 60:   PetscLogEventActivate(USER_EVENT);
 61:   PetscLogEventBegin(USER_EVENT,0,0,0,0);
 62:   PetscSleep(1);
 63:   PetscLogEventEnd(USER_EVENT,0,0,0,0);

 65:   PetscFinalize();
 66:   return 0;
 67: }
 68: