Actual source code: ex58.c
1: static char help[] = "Tests PetscGlobalMinMax\n\n";
3: #include <petscsys.h>
5: int main(int argc, char **argv)
6: {
7: PetscMPIInt size, rank;
8: PetscInt li[2], gi[2] = {-1, -1};
9: PetscReal lr[2], gr[2] = {-1., -1.};
11: PetscFunctionBeginUser;
12: PetscCall(PetscInitialize(&argc, &argv, NULL, help));
13: PetscCallMPI(MPI_Comm_size(PETSC_COMM_WORLD, &size));
14: PetscCallMPI(MPI_Comm_rank(PETSC_COMM_WORLD, &rank));
16: li[0] = 4 + rank;
17: li[1] = -3 + size - rank;
18: PetscCall(PetscGlobalMinMaxInt(PETSC_COMM_WORLD, li, gi));
19: if (gi[0] != 4 || gi[1] != -3 + size) PetscCall(PetscPrintf(PETSC_COMM_SELF, "1) Error MIN/MAX %" PetscInt_FMT " %" PetscInt_FMT "\n", gi[0], gi[1]));
20: PetscCall(PetscGlobalMinMaxInt(PETSC_COMM_WORLD, li, li));
21: if (li[0] != gi[0] || li[1] != gi[1]) PetscCall(PetscPrintf(PETSC_COMM_SELF, "2) Error MIN/MAX %" PetscInt_FMT " %" PetscInt_FMT "\n", li[0], li[1]));
23: if (rank == 0) {
24: li[0] = PETSC_INT_MAX;
25: li[1] = PETSC_INT_MIN;
26: } else if (rank == 1) {
27: li[0] = PETSC_INT_MIN;
28: li[1] = PETSC_INT_MAX;
29: }
31: PetscCall(PetscGlobalMinMaxInt(PETSC_COMM_WORLD, li, gi));
32: if (gi[0] > li[0] || gi[1] < li[1]) PetscCall(PetscPrintf(PETSC_COMM_SELF, "3) Error MIN/MAX %" PetscInt_FMT " %" PetscInt_FMT "\n", gi[0], gi[1]));
34: lr[0] = 4.0 + rank;
35: lr[1] = -3.0 + size - rank;
36: PetscCall(PetscGlobalMinMaxReal(PETSC_COMM_WORLD, lr, gr));
37: if (gr[0] != 4.0 || gr[1] != -3.0 + size) PetscCall(PetscPrintf(PETSC_COMM_SELF, "4) Error MIN/MAX %g %g\n", (double)gr[0], (double)gr[1]));
38: PetscCall(PetscGlobalMinMaxReal(PETSC_COMM_WORLD, lr, lr));
39: if (lr[0] != gr[0] || lr[1] != gr[1]) PetscCall(PetscPrintf(PETSC_COMM_SELF, "5) Error MIN/MAX %g %g\n", (double)lr[0], (double)li[1]));
41: PetscCall(PetscFinalize());
42: return 0;
43: }
45: /*TEST
47: test:
48: output_file: output/ex58_1.out
50: test:
51: suffix: 2
52: output_file: output/ex58_1.out
53: nsize: 2
55: TEST*/