1 static char help[] = "Tests various 1-dimensional DMDA routines.\n\n"; 2 3 #include <petscdm.h> 4 #include <petscdmda.h> 5 #include <petscdraw.h> 6 7 int main(int argc, char **argv) 8 { 9 PetscMPIInt rank; 10 PetscInt M = 13, s = 1, dof = 1; 11 DMBoundaryType bx = DM_BOUNDARY_PERIODIC; 12 DM da; 13 PetscViewer viewer; 14 Vec local, global; 15 PetscScalar value; 16 PetscDraw draw; 17 PetscBool flg = PETSC_FALSE; 18 ISLocalToGlobalMapping is; 19 20 PetscFunctionBeginUser; 21 PetscCall(PetscInitialize(&argc, &argv, (char *)0, help)); 22 PetscCall(PetscViewerDrawOpen(PETSC_COMM_WORLD, 0, "", 280, 480, 600, 200, &viewer)); 23 PetscCall(PetscViewerDrawGetDraw(viewer, 0, &draw)); 24 PetscCall(PetscDrawSetDoubleBuffer(draw)); 25 26 /* Readoptions */ 27 PetscCall(PetscOptionsGetInt(NULL, NULL, "-M", &M, NULL)); 28 PetscCall(PetscOptionsGetEnum(NULL, NULL, "-wrap", DMBoundaryTypes, (PetscEnum *)&bx, NULL)); 29 PetscCall(PetscOptionsGetInt(NULL, NULL, "-dof", &dof, NULL)); 30 PetscCall(PetscOptionsGetInt(NULL, NULL, "-s", &s, NULL)); 31 32 /* Create distributed array and get vectors */ 33 PetscCall(DMDACreate1d(PETSC_COMM_WORLD, bx, M, dof, s, NULL, &da)); 34 PetscCall(DMSetFromOptions(da)); 35 PetscCall(DMSetUp(da)); 36 PetscCall(DMView(da, viewer)); 37 PetscCall(DMCreateGlobalVector(da, &global)); 38 PetscCall(DMCreateLocalVector(da, &local)); 39 40 value = 1; 41 PetscCall(VecSet(global, value)); 42 43 PetscCallMPI(MPI_Comm_rank(PETSC_COMM_WORLD, &rank)); 44 value = rank + 1; 45 PetscCall(VecScale(global, value)); 46 47 PetscCall(VecView(global, viewer)); 48 PetscCall(PetscViewerASCIIPrintf(PETSC_VIEWER_STDOUT_WORLD, "\nGlobal Vector:\n")); 49 PetscCall(VecView(global, PETSC_VIEWER_STDOUT_WORLD)); 50 PetscCall(PetscViewerASCIIPrintf(PETSC_VIEWER_STDOUT_WORLD, "\n")); 51 52 /* Send ghost points to local vectors */ 53 PetscCall(DMGlobalToLocalBegin(da, global, INSERT_VALUES, local)); 54 PetscCall(DMGlobalToLocalEnd(da, global, INSERT_VALUES, local)); 55 56 PetscCall(PetscOptionsGetBool(NULL, NULL, "-local_print", &flg, NULL)); 57 if (flg) { 58 PetscViewer sviewer; 59 60 PetscCall(PetscViewerASCIIPushSynchronized(PETSC_VIEWER_STDOUT_WORLD)); 61 PetscCall(PetscViewerASCIISynchronizedPrintf(PETSC_VIEWER_STDOUT_WORLD, "\nLocal Vector: processor %d\n", rank)); 62 PetscCall(PetscViewerGetSubViewer(PETSC_VIEWER_STDOUT_WORLD, PETSC_COMM_SELF, &sviewer)); 63 PetscCall(VecView(local, sviewer)); 64 PetscCall(PetscViewerRestoreSubViewer(PETSC_VIEWER_STDOUT_WORLD, PETSC_COMM_SELF, &sviewer)); 65 PetscCall(PetscViewerFlush(PETSC_VIEWER_STDOUT_WORLD)); 66 PetscCall(PetscViewerASCIIPopSynchronized(PETSC_VIEWER_STDOUT_WORLD)); 67 } 68 PetscCall(PetscViewerASCIIPrintf(PETSC_VIEWER_STDOUT_WORLD, "\nLocal to global mapping\n")); 69 PetscCall(DMGetLocalToGlobalMapping(da, &is)); 70 PetscCall(ISLocalToGlobalMappingView(is, PETSC_VIEWER_STDOUT_WORLD)); 71 72 /* Free memory */ 73 PetscCall(PetscViewerDestroy(&viewer)); 74 PetscCall(VecDestroy(&global)); 75 PetscCall(VecDestroy(&local)); 76 PetscCall(DMDestroy(&da)); 77 PetscCall(PetscFinalize()); 78 return 0; 79 } 80 81 /*TEST 82 83 test: 84 nsize: 2 85 args: -nox 86 filter: grep -v " MPI process" 87 output_file: output/ex2_1.out 88 requires: x 89 90 test: 91 suffix: 2 92 nsize: 3 93 args: -wrap none -local_print -nox 94 filter: grep -v "Vec Object: Vec" 95 requires: x 96 97 test: 98 suffix: 3 99 nsize: 3 100 args: -wrap ghosted -local_print -nox 101 filter: grep -v "Vec Object: Vec" 102 requires: x 103 104 TEST*/ 105