1 static char help[] = "Tests various DM routines.\n\n"; 2 3 #include <petscdm.h> 4 #include <petscdmda.h> 5 6 int main(int argc, char **argv) 7 { 8 PetscMPIInt rank; 9 PetscInt M = 10, N = 8, m = PETSC_DECIDE, n = PETSC_DECIDE; 10 DM da; 11 PetscViewer viewer; 12 Vec local, global; 13 PetscScalar value; 14 15 PetscFunctionBeginUser; 16 PetscCall(PetscInitialize(&argc, &argv, (char *)0, help)); 17 PetscCall(PetscViewerDrawOpen(PETSC_COMM_WORLD, 0, "", 300, 0, 300, 300, &viewer)); 18 19 /* Read options */ 20 PetscCall(PetscOptionsGetInt(NULL, NULL, "-M", &M, NULL)); 21 PetscCall(PetscOptionsGetInt(NULL, NULL, "-N", &N, NULL)); 22 PetscCall(PetscOptionsGetInt(NULL, NULL, "-m", &m, NULL)); 23 PetscCall(PetscOptionsGetInt(NULL, NULL, "-n", &n, NULL)); 24 25 /* Create distributed array and get vectors */ 26 PetscCall(DMDACreate2d(PETSC_COMM_WORLD, DM_BOUNDARY_NONE, DM_BOUNDARY_NONE, DMDA_STENCIL_BOX, M, N, m, n, 1, 1, NULL, NULL, &da)); 27 PetscCall(DMSetFromOptions(da)); 28 PetscCall(DMSetUp(da)); 29 PetscCall(DMCreateGlobalVector(da, &global)); 30 PetscCall(DMCreateLocalVector(da, &local)); 31 32 value = -3.0; 33 PetscCall(VecSet(global, value)); 34 PetscCall(DMGlobalToLocalBegin(da, global, INSERT_VALUES, local)); 35 PetscCall(DMGlobalToLocalEnd(da, global, INSERT_VALUES, local)); 36 37 PetscCallMPI(MPI_Comm_rank(PETSC_COMM_WORLD, &rank)); 38 value = rank + 1; 39 PetscCall(VecScale(local, value)); 40 PetscCall(DMLocalToGlobalBegin(da, local, ADD_VALUES, global)); 41 PetscCall(DMLocalToGlobalEnd(da, local, ADD_VALUES, global)); 42 43 PetscCall(VecView(global, PETSC_VIEWER_STDOUT_WORLD)); 44 PetscCall(DMView(da, viewer)); 45 46 /* Free memory */ 47 PetscCall(PetscViewerDestroy(&viewer)); 48 PetscCall(VecDestroy(&local)); 49 PetscCall(VecDestroy(&global)); 50 PetscCall(DMDestroy(&da)); 51 PetscCall(PetscFinalize()); 52 return 0; 53 } 54 55 /*TEST 56 57 test: 58 nsize: 2 59 args: -nox 60 filter: grep -v -i Object 61 62 test: 63 suffix: cuda1 64 requires: cuda 65 args: -dm_vec_type cuda -nox 66 filter: grep -v -i Object 67 68 test: 69 suffix: cuda2 70 nsize: 2 71 requires: cuda 72 args: -dm_vec_type cuda -nox 73 filter: grep -v -i Object 74 75 TEST*/ 76