Actual source code: ex3.c
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: int main(int argc,char **argv)
25: {
26: int i,ierr,imax=10000,icount,USER_EVENT;
28: PetscInitialize(&argc,&argv,(char *)0,help);
30: /*
31: Create a new user-defined event.
32: - Note that PetscLogEventRegister() returns to the user a unique
33: integer event number, which should then be used for profiling
34: the event via PetscLogEventBegin() and PetscLogEventEnd().
35: - The user can also optionally log floating point operations
36: with the routine PetscLogFlops().
37: */
38: PetscLogEventRegister(&USER_EVENT,"User event",PETSC_VIEWER_COOKIE);
39: PetscLogEventBegin(USER_EVENT,0,0,0,0);
40: icount = 0;
41: for (i=0; i<imax; i++) icount++;
42: PetscLogFlops(imax);
43: PetscSleep(1);
44: PetscLogEventEnd(USER_EVENT,0,0,0,0);
46: /*
47: We disable the logging of an event.
49: */
50: PetscLogEventDeactivate(USER_EVENT);
51: PetscLogEventBegin(USER_EVENT,0,0,0,0);
52: PetscSleep(1);
53: PetscLogEventEnd(USER_EVENT,0,0,0,0);
55: /*
56: We next enable the logging of an event
57: */
58: PetscLogEventActivate(USER_EVENT);
59: PetscLogEventBegin(USER_EVENT,0,0,0,0);
60: PetscSleep(1);
61: PetscLogEventEnd(USER_EVENT,0,0,0,0);
63: PetscFinalize();
64: return 0;
65: }
66: