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