static char help[] = "Tests various 2-dimensional DMDA routines.\n\n"; #include #include int main(int argc, char **argv) { PetscMPIInt rank; PetscInt M = 10, N = 8, m = PETSC_DECIDE; PetscInt s = 2, w = 2, n = PETSC_DECIDE, nloc, l, i, j, kk; PetscInt Xs, Xm, Ys, Ym, iloc, *iglobal; const PetscInt *ltog; PetscInt *lx = NULL, *ly = NULL; PetscBool testorder = PETSC_FALSE, flg; DMBoundaryType bx = DM_BOUNDARY_NONE, by = DM_BOUNDARY_NONE; DM da; PetscViewer viewer; Vec local, global; PetscScalar value; DMDAStencilType st = DMDA_STENCIL_BOX; AO ao; PetscFunctionBeginUser; PetscCall(PetscInitialize(&argc, &argv, NULL, help)); PetscCall(PetscViewerDrawOpen(PETSC_COMM_WORLD, 0, "", 300, 0, 400, 400, &viewer)); /* Readoptions */ PetscCall(PetscOptionsGetInt(NULL, NULL, "-NX", &M, NULL)); PetscCall(PetscOptionsGetInt(NULL, NULL, "-NY", &N, NULL)); PetscCall(PetscOptionsGetInt(NULL, NULL, "-m", &m, NULL)); PetscCall(PetscOptionsGetInt(NULL, NULL, "-n", &n, NULL)); PetscCall(PetscOptionsGetInt(NULL, NULL, "-s", &s, NULL)); PetscCall(PetscOptionsGetInt(NULL, NULL, "-w", &w, NULL)); flg = PETSC_FALSE; PetscCall(PetscOptionsGetBool(NULL, NULL, "-xperiodic", &flg, NULL)); if (flg) bx = DM_BOUNDARY_PERIODIC; flg = PETSC_FALSE; PetscCall(PetscOptionsGetBool(NULL, NULL, "-yperiodic", &flg, NULL)); if (flg) by = DM_BOUNDARY_PERIODIC; flg = PETSC_FALSE; PetscCall(PetscOptionsGetBool(NULL, NULL, "-xghosted", &flg, NULL)); if (flg) bx = DM_BOUNDARY_GHOSTED; flg = PETSC_FALSE; PetscCall(PetscOptionsGetBool(NULL, NULL, "-yghosted", &flg, NULL)); if (flg) by = DM_BOUNDARY_GHOSTED; flg = PETSC_FALSE; PetscCall(PetscOptionsGetBool(NULL, NULL, "-star", &flg, NULL)); if (flg) st = DMDA_STENCIL_STAR; flg = PETSC_FALSE; PetscCall(PetscOptionsGetBool(NULL, NULL, "-box", &flg, NULL)); if (flg) st = DMDA_STENCIL_BOX; flg = PETSC_FALSE; PetscCall(PetscOptionsGetBool(NULL, NULL, "-testorder", &testorder, NULL)); /* Test putting two nodes in x and y on each processor, exact last processor in x and y gets the rest. */ flg = PETSC_FALSE; PetscCall(PetscOptionsGetBool(NULL, NULL, "-distribute", &flg, NULL)); if (flg) { PetscCheck(m != PETSC_DECIDE, PETSC_COMM_WORLD, PETSC_ERR_USER_INPUT, "Must set -m option with -distribute option"); PetscCall(PetscMalloc1(m, &lx)); for (i = 0; i < m - 1; i++) lx[i] = 4; lx[m - 1] = M - 4 * (m - 1); PetscCheck(n != PETSC_DECIDE, PETSC_COMM_WORLD, PETSC_ERR_USER_INPUT, "Must set -n option with -distribute option"); PetscCall(PetscMalloc1(n, &ly)); for (i = 0; i < n - 1; i++) ly[i] = 2; ly[n - 1] = N - 2 * (n - 1); } /* Create distributed array and get vectors */ PetscCall(DMDACreate2d(PETSC_COMM_WORLD, bx, by, st, M, N, m, n, w, s, lx, ly, &da)); PetscCall(DMSetFromOptions(da)); PetscCall(DMSetUp(da)); PetscCall(PetscFree(lx)); PetscCall(PetscFree(ly)); PetscCall(DMView(da, viewer)); PetscCall(DMCreateGlobalVector(da, &global)); PetscCall(DMCreateLocalVector(da, &local)); /* Set global vector; send ghost points to local vectors */ value = 1; PetscCall(VecSet(global, value)); PetscCall(DMGlobalToLocalBegin(da, global, INSERT_VALUES, local)); PetscCall(DMGlobalToLocalEnd(da, global, INSERT_VALUES, local)); /* Scale local vectors according to processor rank; pass to global vector */ PetscCallMPI(MPI_Comm_rank(PETSC_COMM_WORLD, &rank)); value = rank; PetscCall(VecScale(local, value)); PetscCall(DMLocalToGlobalBegin(da, local, INSERT_VALUES, global)); PetscCall(DMLocalToGlobalEnd(da, local, INSERT_VALUES, global)); if (!testorder) { /* turn off printing when testing ordering mappings */ PetscCall(PetscPrintf(PETSC_COMM_WORLD, "\nGlobal Vectors:\n")); PetscCall(VecView(global, PETSC_VIEWER_STDOUT_WORLD)); PetscCall(PetscPrintf(PETSC_COMM_WORLD, "\n\n")); } /* Send ghost points to local vectors */ PetscCall(DMGlobalToLocalBegin(da, global, INSERT_VALUES, local)); PetscCall(DMGlobalToLocalEnd(da, global, INSERT_VALUES, local)); flg = PETSC_FALSE; PetscCall(PetscOptionsGetBool(NULL, NULL, "-local_print", &flg, NULL)); if (flg) { PetscViewer sviewer; PetscCall(PetscViewerASCIIPushSynchronized(PETSC_VIEWER_STDOUT_WORLD)); PetscCall(PetscSynchronizedPrintf(PETSC_COMM_WORLD, "\nLocal Vector: processor %d\n", rank)); PetscCall(PetscViewerGetSubViewer(PETSC_VIEWER_STDOUT_WORLD, PETSC_COMM_SELF, &sviewer)); PetscCall(VecView(local, sviewer)); PetscCall(PetscViewerRestoreSubViewer(PETSC_VIEWER_STDOUT_WORLD, PETSC_COMM_SELF, &sviewer)); PetscCall(PetscViewerASCIIPopSynchronized(PETSC_VIEWER_STDOUT_WORLD)); } /* Tests mappings between application/PETSc orderings */ if (testorder) { ISLocalToGlobalMapping ltogm; PetscCall(DMGetLocalToGlobalMapping(da, <ogm)); PetscCall(ISLocalToGlobalMappingGetSize(ltogm, &nloc)); PetscCall(ISLocalToGlobalMappingGetIndices(ltogm, <og)); PetscCall(DMDAGetGhostCorners(da, &Xs, &Ys, NULL, &Xm, &Ym, NULL)); PetscCall(DMDAGetAO(da, &ao)); PetscCall(PetscMalloc1(nloc, &iglobal)); /* Set iglobal to be global indices for each processor's local and ghost nodes, using the DMDA ordering of grid points */ kk = 0; for (j = Ys; j < Ys + Ym; j++) { for (i = Xs; i < Xs + Xm; i++) { iloc = w * ((j - Ys) * Xm + i - Xs); for (l = 0; l < w; l++) iglobal[kk++] = ltog[iloc + l]; } } /* Map this to the application ordering (which for DMDAs is just the natural ordering that would be used for 1 processor, numbering most rapidly by x, then y) */ PetscCall(AOPetscToApplication(ao, nloc, iglobal)); /* Then map the application ordering back to the PETSc DMDA ordering */ PetscCall(AOApplicationToPetsc(ao, nloc, iglobal)); /* Verify the mappings */ kk = 0; for (j = Ys; j < Ys + Ym; j++) { for (i = Xs; i < Xs + Xm; i++) { iloc = w * ((j - Ys) * Xm + i - Xs); for (l = 0; l < w; l++) { if (iglobal[kk] != ltog[iloc + l]) { PetscCall(PetscFPrintf(PETSC_COMM_SELF, stdout, "[%d] Problem with mapping: j=%" PetscInt_FMT ", i=%" PetscInt_FMT ", l=%" PetscInt_FMT ", petsc1=%" PetscInt_FMT ", petsc2=%" PetscInt_FMT "\n", rank, j, i, l, ltog[iloc + l], iglobal[kk])); } kk++; } } } PetscCall(PetscFree(iglobal)); PetscCall(ISLocalToGlobalMappingRestoreIndices(ltogm, <og)); } /* Free memory */ PetscCall(PetscViewerDestroy(&viewer)); PetscCall(VecDestroy(&local)); PetscCall(VecDestroy(&global)); PetscCall(DMDestroy(&da)); PetscCall(PetscFinalize()); return 0; } /*TEST test: nsize: 4 args: -nox filter: grep -v -i Object requires: x test: suffix: 2 args: -testorder -nox requires: x output_file: output/empty.out TEST*/