Actual source code: ex44.c
2: static char help[] = "Tests various DMComposite routines.\n\n";
4: #include <petscdm.h>
5: #include <petscdmda.h>
6: #include <petscdmcomposite.h>
8: int main(int argc, char **argv)
9: {
10: PetscMPIInt rank;
11: DM da1, da2, packer;
12: Vec local, global, globals[2], buffer;
13: PetscScalar value;
14: PetscViewer viewer;
16: PetscFunctionBeginUser;
17: PetscCall(PetscInitialize(&argc, &argv, (char *)0, help));
19: PetscCall(DMCompositeCreate(PETSC_COMM_WORLD, &packer));
20: PetscCall(DMDACreate1d(PETSC_COMM_WORLD, DM_BOUNDARY_NONE, 8, 1, 1, NULL, &da1));
21: PetscCall(DMSetFromOptions(da1));
22: PetscCall(DMSetUp(da1));
23: PetscCall(DMCompositeAddDM(packer, da1));
24: PetscCall(DMDACreate1d(PETSC_COMM_WORLD, DM_BOUNDARY_NONE, 6, 1, 1, NULL, &da2));
25: PetscCall(DMSetFromOptions(da2));
26: PetscCall(DMSetUp(da2));
27: PetscCall(DMCompositeAddDM(packer, da2));
29: PetscCall(DMCreateGlobalVector(packer, &global));
30: PetscCall(DMCreateLocalVector(packer, &local));
31: PetscCall(DMCreateLocalVector(packer, &buffer));
33: PetscCall(DMCompositeGetAccessArray(packer, global, 2, NULL, globals));
34: value = 1;
35: PetscCall(VecSet(globals[0], value));
36: value = -1;
37: PetscCall(VecSet(globals[1], value));
38: PetscCallMPI(MPI_Comm_rank(PETSC_COMM_WORLD, &rank));
39: value = rank + 1;
40: PetscCall(VecScale(globals[0], value));
41: PetscCall(VecScale(globals[1], value));
42: PetscCall(DMCompositeRestoreAccessArray(packer, global, 2, NULL, globals));
44: /* Test GlobalToLocal in insert mode */
45: PetscCall(DMGlobalToLocalBegin(packer, global, INSERT_VALUES, local));
46: PetscCall(DMGlobalToLocalEnd(packer, global, INSERT_VALUES, local));
48: PetscCall(PetscViewerASCIIPushSynchronized(PETSC_VIEWER_STDOUT_WORLD));
49: PetscCall(PetscViewerASCIISynchronizedPrintf(PETSC_VIEWER_STDOUT_WORLD, "\nLocal Vector: processor %d\n", rank));
50: PetscCall(PetscViewerGetSubViewer(PETSC_VIEWER_STDOUT_WORLD, PETSC_COMM_SELF, &viewer));
51: PetscCall(VecView(local, viewer));
52: PetscCall(PetscViewerRestoreSubViewer(PETSC_VIEWER_STDOUT_WORLD, PETSC_COMM_SELF, &viewer));
53: PetscCall(PetscViewerFlush(PETSC_VIEWER_STDOUT_WORLD));
54: PetscCall(PetscViewerASCIIPopSynchronized(PETSC_VIEWER_STDOUT_WORLD));
56: /* Test LocalToGlobal in insert mode */
57: PetscCall(DMLocalToGlobalBegin(packer, local, INSERT_VALUES, global));
58: PetscCall(DMLocalToGlobalEnd(packer, local, INSERT_VALUES, global));
60: PetscCall(VecView(global, PETSC_VIEWER_STDOUT_WORLD));
62: /* Test LocalToLocal in insert mode */
63: PetscCall(DMLocalToLocalBegin(packer, local, INSERT_VALUES, buffer));
64: PetscCall(DMLocalToLocalEnd(packer, local, INSERT_VALUES, buffer));
66: PetscCall(PetscViewerASCIIPushSynchronized(PETSC_VIEWER_STDOUT_WORLD));
67: PetscCall(PetscViewerASCIISynchronizedPrintf(PETSC_VIEWER_STDOUT_WORLD, "\nLocal Vector: processor %d\n", rank));
68: PetscCall(PetscViewerGetSubViewer(PETSC_VIEWER_STDOUT_WORLD, PETSC_COMM_SELF, &viewer));
69: PetscCall(VecView(buffer, viewer));
70: PetscCall(PetscViewerRestoreSubViewer(PETSC_VIEWER_STDOUT_WORLD, PETSC_COMM_SELF, &viewer));
71: PetscCall(PetscViewerFlush(PETSC_VIEWER_STDOUT_WORLD));
72: PetscCall(PetscViewerASCIIPopSynchronized(PETSC_VIEWER_STDOUT_WORLD));
74: PetscCall(VecDestroy(&buffer));
75: PetscCall(VecDestroy(&local));
76: PetscCall(VecDestroy(&global));
77: PetscCall(DMDestroy(&packer));
78: PetscCall(DMDestroy(&da2));
79: PetscCall(DMDestroy(&da1));
81: PetscCall(PetscFinalize());
82: return 0;
83: }
85: /*TEST
87: test:
88: nsize: 3
90: TEST*/