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