1 static char help[] = "Tests various 3-dimensional DMDA routines.\n\n"; 2 3 #include <petscdm.h> 4 #include <petscdmda.h> 5 #include <petscao.h> 6 7 int main(int argc, char **argv) 8 { 9 PetscMPIInt rank; 10 PetscInt M = 3, N = 5, P = 3, s = 1, w = 2, nloc, l, i, j, k, kk, m = PETSC_DECIDE, n = PETSC_DECIDE, p = PETSC_DECIDE; 11 PetscInt Xs, Xm, Ys, Ym, Zs, Zm, iloc, *iglobal; 12 const PetscInt *ltog; 13 PetscInt *lx = NULL, *ly = NULL, *lz = NULL; 14 PetscBool test_order = PETSC_FALSE; 15 DM da; 16 PetscViewer viewer; 17 Vec local, global; 18 PetscScalar value; 19 DMBoundaryType bx = DM_BOUNDARY_NONE, by = DM_BOUNDARY_NONE, bz = DM_BOUNDARY_NONE; 20 DMDAStencilType stencil_type = DMDA_STENCIL_BOX; 21 AO ao; 22 PetscBool flg = PETSC_FALSE; 23 24 PetscFunctionBeginUser; 25 PetscCall(PetscInitialize(&argc, &argv, (char *)0, help)); 26 PetscCall(PetscViewerDrawOpen(PETSC_COMM_WORLD, 0, "", 300, 0, 400, 300, &viewer)); 27 28 /* Read options */ 29 PetscCall(PetscOptionsGetInt(NULL, NULL, "-NX", &M, NULL)); 30 PetscCall(PetscOptionsGetInt(NULL, NULL, "-NY", &N, NULL)); 31 PetscCall(PetscOptionsGetInt(NULL, NULL, "-NZ", &P, NULL)); 32 PetscCall(PetscOptionsGetInt(NULL, NULL, "-m", &m, NULL)); 33 PetscCall(PetscOptionsGetInt(NULL, NULL, "-n", &n, NULL)); 34 PetscCall(PetscOptionsGetInt(NULL, NULL, "-p", &p, NULL)); 35 PetscCall(PetscOptionsGetInt(NULL, NULL, "-s", &s, NULL)); 36 PetscCall(PetscOptionsGetInt(NULL, NULL, "-w", &w, NULL)); 37 flg = PETSC_FALSE; 38 PetscCall(PetscOptionsGetBool(NULL, NULL, "-star", &flg, NULL)); 39 if (flg) stencil_type = DMDA_STENCIL_STAR; 40 flg = PETSC_FALSE; 41 PetscCall(PetscOptionsGetBool(NULL, NULL, "-box", &flg, NULL)); 42 if (flg) stencil_type = DMDA_STENCIL_BOX; 43 44 flg = PETSC_FALSE; 45 PetscCall(PetscOptionsGetBool(NULL, NULL, "-xperiodic", &flg, NULL)); 46 if (flg) bx = DM_BOUNDARY_PERIODIC; 47 flg = PETSC_FALSE; 48 PetscCall(PetscOptionsGetBool(NULL, NULL, "-xghosted", &flg, NULL)); 49 if (flg) bx = DM_BOUNDARY_GHOSTED; 50 flg = PETSC_FALSE; 51 PetscCall(PetscOptionsGetBool(NULL, NULL, "-xnonghosted", &flg, NULL)); 52 53 flg = PETSC_FALSE; 54 PetscCall(PetscOptionsGetBool(NULL, NULL, "-yperiodic", &flg, NULL)); 55 if (flg) by = DM_BOUNDARY_PERIODIC; 56 flg = PETSC_FALSE; 57 PetscCall(PetscOptionsGetBool(NULL, NULL, "-yghosted", &flg, NULL)); 58 if (flg) by = DM_BOUNDARY_GHOSTED; 59 flg = PETSC_FALSE; 60 PetscCall(PetscOptionsGetBool(NULL, NULL, "-ynonghosted", &flg, NULL)); 61 62 flg = PETSC_FALSE; 63 PetscCall(PetscOptionsGetBool(NULL, NULL, "-zperiodic", &flg, NULL)); 64 if (flg) bz = DM_BOUNDARY_PERIODIC; 65 flg = PETSC_FALSE; 66 PetscCall(PetscOptionsGetBool(NULL, NULL, "-zghosted", &flg, NULL)); 67 if (flg) bz = DM_BOUNDARY_GHOSTED; 68 flg = PETSC_FALSE; 69 PetscCall(PetscOptionsGetBool(NULL, NULL, "-znonghosted", &flg, NULL)); 70 71 PetscCall(PetscOptionsGetBool(NULL, NULL, "-testorder", &test_order, NULL)); 72 73 flg = PETSC_FALSE; 74 PetscCall(PetscOptionsGetBool(NULL, NULL, "-distribute", &flg, NULL)); 75 if (flg) { 76 PetscCheck(m != PETSC_DECIDE, PETSC_COMM_WORLD, PETSC_ERR_USER_INPUT, "Must set -m option with -distribute option"); 77 PetscCall(PetscMalloc1(m, &lx)); 78 for (i = 0; i < m - 1; i++) lx[i] = 4; 79 lx[m - 1] = M - 4 * (m - 1); 80 PetscCheck(n != PETSC_DECIDE, PETSC_COMM_WORLD, PETSC_ERR_USER_INPUT, "Must set -n option with -distribute option"); 81 PetscCall(PetscMalloc1(n, &ly)); 82 for (i = 0; i < n - 1; i++) ly[i] = 2; 83 ly[n - 1] = N - 2 * (n - 1); 84 PetscCheck(p != PETSC_DECIDE, PETSC_COMM_WORLD, PETSC_ERR_USER_INPUT, "Must set -p option with -distribute option"); 85 PetscCall(PetscMalloc1(p, &lz)); 86 for (i = 0; i < p - 1; i++) lz[i] = 2; 87 lz[p - 1] = P - 2 * (p - 1); 88 } 89 90 /* Create distributed array and get vectors */ 91 PetscCall(DMDACreate3d(PETSC_COMM_WORLD, bx, by, bz, stencil_type, M, N, P, m, n, p, w, s, lx, ly, lz, &da)); 92 PetscCall(DMSetFromOptions(da)); 93 PetscCall(DMSetUp(da)); 94 PetscCall(PetscFree(lx)); 95 PetscCall(PetscFree(ly)); 96 PetscCall(PetscFree(lz)); 97 PetscCall(DMView(da, viewer)); 98 PetscCall(DMCreateGlobalVector(da, &global)); 99 PetscCall(DMCreateLocalVector(da, &local)); 100 101 /* Set global vector; send ghost points to local vectors */ 102 value = 1; 103 PetscCall(VecSet(global, value)); 104 PetscCall(DMGlobalToLocalBegin(da, global, INSERT_VALUES, local)); 105 PetscCall(DMGlobalToLocalEnd(da, global, INSERT_VALUES, local)); 106 107 /* Scale local vectors according to processor rank; pass to global vector */ 108 PetscCallMPI(MPI_Comm_rank(PETSC_COMM_WORLD, &rank)); 109 value = rank; 110 PetscCall(VecScale(local, value)); 111 PetscCall(DMLocalToGlobalBegin(da, local, INSERT_VALUES, global)); 112 PetscCall(DMLocalToGlobalEnd(da, local, INSERT_VALUES, global)); 113 114 if (!test_order) { /* turn off printing when testing ordering mappings */ 115 if (M * N * P < 40) { 116 PetscCall(PetscPrintf(PETSC_COMM_WORLD, "\nGlobal Vector:\n")); 117 PetscCall(VecView(global, PETSC_VIEWER_STDOUT_WORLD)); 118 PetscCall(PetscPrintf(PETSC_COMM_WORLD, "\n")); 119 } 120 } 121 122 /* Send ghost points to local vectors */ 123 PetscCall(DMGlobalToLocalBegin(da, global, INSERT_VALUES, local)); 124 PetscCall(DMGlobalToLocalEnd(da, global, INSERT_VALUES, local)); 125 126 flg = PETSC_FALSE; 127 PetscCall(PetscOptionsGetBool(NULL, NULL, "-local_print", &flg, NULL)); 128 if (flg) { 129 PetscViewer sviewer; 130 PetscCall(PetscViewerASCIIPushSynchronized(PETSC_VIEWER_STDOUT_WORLD)); 131 PetscCall(PetscSynchronizedPrintf(PETSC_COMM_WORLD, "\nLocal Vector: processor %d\n", rank)); 132 PetscCall(PetscViewerGetSubViewer(PETSC_VIEWER_STDOUT_WORLD, PETSC_COMM_SELF, &sviewer)); 133 PetscCall(VecView(local, sviewer)); 134 PetscCall(PetscViewerRestoreSubViewer(PETSC_VIEWER_STDOUT_WORLD, PETSC_COMM_SELF, &sviewer)); 135 PetscCall(PetscViewerASCIIPopSynchronized(PETSC_VIEWER_STDOUT_WORLD)); 136 } 137 138 /* Tests mappings between application/PETSc orderings */ 139 if (test_order) { 140 ISLocalToGlobalMapping ltogm; 141 142 PetscCall(DMGetLocalToGlobalMapping(da, <ogm)); 143 PetscCall(ISLocalToGlobalMappingGetSize(ltogm, &nloc)); 144 PetscCall(ISLocalToGlobalMappingGetIndices(ltogm, <og)); 145 146 PetscCall(DMDAGetGhostCorners(da, &Xs, &Ys, &Zs, &Xm, &Ym, &Zm)); 147 PetscCall(DMDAGetAO(da, &ao)); 148 /* PetscCall(AOView(ao,PETSC_VIEWER_STDOUT_WORLD)); */ 149 PetscCall(PetscMalloc1(nloc, &iglobal)); 150 151 /* Set iglobal to be global indices for each processor's local and ghost nodes, 152 using the DMDA ordering of grid points */ 153 kk = 0; 154 for (k = Zs; k < Zs + Zm; k++) { 155 for (j = Ys; j < Ys + Ym; j++) { 156 for (i = Xs; i < Xs + Xm; i++) { 157 iloc = w * ((k - Zs) * Xm * Ym + (j - Ys) * Xm + i - Xs); 158 for (l = 0; l < w; l++) iglobal[kk++] = ltog[iloc + l]; 159 } 160 } 161 } 162 163 /* Map this to the application ordering (which for DMDAs is just the natural ordering 164 that would be used for 1 processor, numbering most rapidly by x, then y, then z) */ 165 PetscCall(AOPetscToApplication(ao, nloc, iglobal)); 166 167 /* Then map the application ordering back to the PETSc DMDA ordering */ 168 PetscCall(AOApplicationToPetsc(ao, nloc, iglobal)); 169 170 /* Verify the mappings */ 171 kk = 0; 172 for (k = Zs; k < Zs + Zm; k++) { 173 for (j = Ys; j < Ys + Ym; j++) { 174 for (i = Xs; i < Xs + Xm; i++) { 175 iloc = w * ((k - Zs) * Xm * Ym + (j - Ys) * Xm + i - Xs); 176 for (l = 0; l < w; l++) { 177 if (iglobal[kk] != ltog[iloc + l]) { 178 PetscCall(PetscPrintf(MPI_COMM_WORLD, "[%d] Problem with mapping: z=%" PetscInt_FMT ", j=%" PetscInt_FMT ", i=%" PetscInt_FMT ", l=%" PetscInt_FMT ", petsc1=%" PetscInt_FMT ", petsc2=%" PetscInt_FMT "\n", rank, k, j, i, l, ltog[iloc + l], iglobal[kk])); 179 } 180 kk++; 181 } 182 } 183 } 184 } 185 PetscCall(PetscFree(iglobal)); 186 PetscCall(ISLocalToGlobalMappingRestoreIndices(ltogm, <og)); 187 } 188 189 /* Free memory */ 190 PetscCall(PetscViewerDestroy(&viewer)); 191 PetscCall(VecDestroy(&local)); 192 PetscCall(VecDestroy(&global)); 193 PetscCall(DMDestroy(&da)); 194 PetscCall(PetscFinalize()); 195 return 0; 196 } 197 198 /*TEST 199 200 test: 201 args: -testorder -nox 202 203 TEST*/ 204