1 static char help[] = "Tests PetscGlobalMinMax\n\n"; 2 3 #include <petscsys.h> 4 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.}; 10 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)); 15 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])); 22 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 } 30 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])); 33 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])); 40 41 PetscCall(PetscFinalize()); 42 return 0; 43 } 44 45 /*TEST 46 47 test: 48 output_file: output/ex58_1.out 49 50 test: 51 suffix: 2 52 output_file: output/ex58_1.out 53 nsize: 2 54 55 TEST*/ 56