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