1 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_view,\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.\n\n"; 8 9 /*T 10 Concepts: PetscLog^user-defined event profiling 11 Concepts: profiling^user-defined event 12 Concepts: PetscLog^activating/deactivating events for profiling 13 Concepts: profiling^activating/deactivating events 14 Processors: n 15 T*/ 16 17 /* 18 Include "petscsys.h" so that we can use PETSc profiling routines. 19 */ 20 #include <petscsys.h> 21 #include <petscviewer.h> 22 23 int main(int argc,char **argv) 24 { 25 PetscMPIInt rank; 26 int i,imax=10000,icount; 27 PetscLogEvent USER_EVENT,check_USER_EVENT; 28 29 PetscCall(PetscInitialize(&argc,&argv,NULL,help)); 30 31 /* 32 Create a new user-defined event. 33 - Note that PetscLogEventRegister() returns to the user a unique 34 integer event number, which should then be used for profiling 35 the event via PetscLogEventBegin() and PetscLogEventEnd(). 36 - The user can also optionally log floating point operations 37 with the routine PetscLogFlops(). 38 */ 39 PetscCall(PetscLogEventRegister("User event",PETSC_VIEWER_CLASSID,&USER_EVENT)); 40 PetscCall(PetscLogEventGetId("User event",&check_USER_EVENT)); 41 PetscCheck(USER_EVENT == check_USER_EVENT,PETSC_COMM_SELF,PETSC_ERR_PLIB,"Event Ids do not match"); 42 43 PetscCall(PetscLogEventBegin(USER_EVENT,0,0,0,0)); 44 icount = 0; 45 for (i=0; i<imax; i++) icount++; 46 PetscCall(PetscLogFlops(imax)); 47 PetscCall(PetscSleep(0.5)); 48 PetscCall(PetscLogEventEnd(USER_EVENT,0,0,0,0)); 49 50 /* 51 We disable the logging of an event. 52 53 */ 54 PetscCall(PetscLogEventDeactivate(USER_EVENT)); 55 PetscCall(PetscLogEventBegin(USER_EVENT,0,0,0,0)); 56 PetscCall(PetscSleep(0.5)); 57 PetscCall(PetscLogEventEnd(USER_EVENT,0,0,0,0)); 58 59 /* 60 We next enable the logging of an event 61 */ 62 PetscCall(PetscLogEventActivate(USER_EVENT)); 63 PetscCall(PetscLogEventBegin(USER_EVENT,0,0,0,0)); 64 PetscCall(PetscSleep(0.5)); 65 PetscCall(PetscLogEventEnd(USER_EVENT,0,0,0,0)); 66 67 /* 68 We test event logging imbalance 69 */ 70 PetscCallMPI(MPI_Comm_rank(PETSC_COMM_WORLD,&rank)); 71 if (rank == 0) PetscCall(PetscSleep(0.5)); 72 PetscCall(PetscLogEventSync(USER_EVENT,PETSC_COMM_WORLD)); 73 PetscCall(PetscLogEventBegin(USER_EVENT,0,0,0,0)); 74 PetscCallMPI(MPI_Barrier(PETSC_COMM_WORLD)); 75 PetscCall(PetscSleep(0.5)); 76 PetscCall(PetscLogEventEnd(USER_EVENT,0,0,0,0)); 77 78 PetscCall(PetscFinalize()); 79 return 0; 80 } 81 82 /*TEST 83 84 build: 85 requires: defined(PETSC_USE_LOG) 86 87 test: 88 89 TEST*/ 90