Actual source code: ex3.c
2: static char help[] = "Augmenting PETSc profiling by add events.\n\
3: Run this program with one of the\n\
4: following options to generate logging information: -log, -log_summary,\n\
5: -log_all. The PETSc routines automatically log event times and flops,\n\
6: so this monitoring is intended solely for users to employ in application\n\
7: codes. Note that the code must be compiled with the flag -DPETSC_USE_LOG\n\
8: (the default) to activate logging.\n\n";
10: /*T
11: Concepts: PetscLog^user-defined event profiling
12: Concepts: profiling^user-defined event
13: Concepts: PetscLog^activating/deactivating events for profiling
14: Concepts: profiling^activating/deactivating events
15: Processors: n
16: T*/
18: /*
19: Include "petsc.h" so that we can use PETSc profiling routines.
20: */
21: #include petsc.h
25: int main(int argc,char **argv)
26: {
28: int i,imax=10000,icount;
29: PetscEvent USER_EVENT;
31: PetscInitialize(&argc,&argv,(char *)0,help);
33: /*
34: Create a new user-defined event.
35: - Note that PetscLogEventRegister() returns to the user a unique
36: integer event number, which should then be used for profiling
37: the event via PetscLogEventBegin() and PetscLogEventEnd().
38: - The user can also optionally log floating point operations
39: with the routine PetscLogFlops().
40: */
41: PetscLogEventRegister(&USER_EVENT,"User event",PETSC_VIEWER_COOKIE);
42: PetscLogEventBegin(USER_EVENT,0,0,0,0);
43: icount = 0;
44: for (i=0; i<imax; i++) icount++;
45: PetscLogFlops(imax);
46: PetscSleep(1);
47: PetscLogEventEnd(USER_EVENT,0,0,0,0);
49: /*
50: We disable the logging of an event.
52: */
53: PetscLogEventDeactivate(USER_EVENT);
54: PetscLogEventBegin(USER_EVENT,0,0,0,0);
55: PetscSleep(1);
56: PetscLogEventEnd(USER_EVENT,0,0,0,0);
58: /*
59: We next enable the logging of an event
60: */
61: PetscLogEventActivate(USER_EVENT);
62: PetscLogEventBegin(USER_EVENT,0,0,0,0);
63: PetscSleep(1);
64: PetscLogEventEnd(USER_EVENT,0,0,0,0);
66: PetscFinalize();
67: return 0;
68: }
69: