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