1 2 static char help[] = "Tests timing PetscSortInt().\n\n"; 3 4 #include <petscsys.h> 5 6 int main(int argc,char **argv) 7 { 8 PetscInt i,n = 1000,*values; 9 #if defined(PETSC_USE_LOG) 10 PetscLogEvent event; 11 #endif 12 PetscRandom rand; 13 PetscReal value; 14 PetscErrorCode ierr; 15 PetscBool values_view=PETSC_FALSE; 16 PetscMPIInt rank; 17 18 ierr = PetscInitialize(&argc,&argv,(char*)0,help);if (ierr) return ierr; 19 ierr = MPI_Comm_rank(PETSC_COMM_WORLD,&rank);CHKERRQ(ierr); 20 ierr = PetscOptionsGetInt(NULL,NULL,"-n",&n,NULL);CHKERRQ(ierr); 21 ierr = PetscOptionsGetBool(NULL,0,"-values_view",&values_view,NULL);CHKERRQ(ierr); 22 23 ierr = PetscRandomCreate(PETSC_COMM_SELF,&rand);CHKERRQ(ierr); 24 ierr = PetscRandomSetFromOptions(rand);CHKERRQ(ierr); 25 26 ierr = PetscMalloc1(n,&values);CHKERRQ(ierr); 27 for (i=0; i<n; i++) { 28 ierr = PetscRandomGetValueReal(rand,&value);CHKERRQ(ierr); 29 values[i] = (PetscInt)(n*value + 2.0); 30 } 31 ierr = PetscSortInt(n,values);CHKERRQ(ierr); 32 33 ierr = PetscLogEventRegister("Sort",0,&event);CHKERRQ(ierr); 34 ierr = PetscLogEventBegin(event,0,0,0,0);CHKERRQ(ierr); 35 36 for (i=0; i<n; i++) { 37 ierr = PetscRandomGetValueReal(rand,&value);CHKERRQ(ierr); 38 values[i] = (PetscInt)(n*value + 2.0); 39 } 40 ierr = PetscSortInt(n,values);CHKERRQ(ierr); 41 ierr = PetscLogEventEnd(event,0,0,0,0);CHKERRQ(ierr); 42 43 for (i=1; i<n; i++) { 44 if (values[i] < values[i-1]) SETERRQ(PETSC_COMM_SELF,PETSC_ERR_PLIB,"Values not sorted"); 45 if (values_view && !rank) {ierr = PetscPrintf(PETSC_COMM_SELF,"%D %D\n",i,values[i]);CHKERRQ(ierr);} 46 } 47 ierr = PetscFree(values);CHKERRQ(ierr); 48 ierr = PetscRandomDestroy(&rand);CHKERRQ(ierr); 49 50 ierr = PetscFinalize(); 51 return ierr; 52 } 53 54 /*TEST 55 56 test: 57 args: -values_view 58 59 TEST*/ 60