1 2 static char help[] = "Tests various 2-dimensional DMDA routines.\n\n"; 3 4 #include <petscdm.h> 5 #include <petscdmda.h> 6 7 int main(int argc,char **argv) 8 { 9 PetscMPIInt rank; 10 PetscErrorCode ierr; 11 PetscInt M = 10,N = 8,m = PETSC_DECIDE; 12 PetscInt s =2,w=2,n = PETSC_DECIDE,nloc,l,i,j,kk; 13 PetscInt Xs,Xm,Ys,Ym,iloc,*iglobal; 14 const PetscInt *ltog; 15 PetscInt *lx = NULL,*ly = NULL; 16 PetscBool testorder = PETSC_FALSE,flg; 17 DMBoundaryType bx = DM_BOUNDARY_NONE,by= DM_BOUNDARY_NONE; 18 DM da; 19 PetscViewer viewer; 20 Vec local,global; 21 PetscScalar value; 22 DMDAStencilType st = DMDA_STENCIL_BOX; 23 AO ao; 24 25 ierr = PetscInitialize(&argc,&argv,(char*)0,help);if (ierr) return ierr; 26 ierr = PetscViewerDrawOpen(PETSC_COMM_WORLD,0,"",300,0,400,400,&viewer);CHKERRQ(ierr); 27 28 /* Readoptions */ 29 ierr = PetscOptionsGetInt(NULL,NULL,"-NX",&M,NULL);CHKERRQ(ierr); 30 ierr = PetscOptionsGetInt(NULL,NULL,"-NY",&N,NULL);CHKERRQ(ierr); 31 ierr = PetscOptionsGetInt(NULL,NULL,"-m",&m,NULL);CHKERRQ(ierr); 32 ierr = PetscOptionsGetInt(NULL,NULL,"-n",&n,NULL);CHKERRQ(ierr); 33 ierr = PetscOptionsGetInt(NULL,NULL,"-s",&s,NULL);CHKERRQ(ierr); 34 ierr = PetscOptionsGetInt(NULL,NULL,"-w",&w,NULL);CHKERRQ(ierr); 35 36 flg = PETSC_FALSE; 37 ierr = PetscOptionsGetBool(NULL,NULL,"-xperiodic",&flg,NULL);CHKERRQ(ierr); if (flg) bx = DM_BOUNDARY_PERIODIC; 38 flg = PETSC_FALSE; 39 ierr = PetscOptionsGetBool(NULL,NULL,"-yperiodic",&flg,NULL);CHKERRQ(ierr); if (flg) by = DM_BOUNDARY_PERIODIC; 40 flg = PETSC_FALSE; 41 ierr = PetscOptionsGetBool(NULL,NULL,"-xghosted",&flg,NULL);CHKERRQ(ierr); if (flg) bx = DM_BOUNDARY_GHOSTED; 42 flg = PETSC_FALSE; 43 ierr = PetscOptionsGetBool(NULL,NULL,"-yghosted",&flg,NULL);CHKERRQ(ierr); if (flg) by = DM_BOUNDARY_GHOSTED; 44 flg = PETSC_FALSE; 45 ierr = PetscOptionsGetBool(NULL,NULL,"-star",&flg,NULL);CHKERRQ(ierr); if (flg) st = DMDA_STENCIL_STAR; 46 flg = PETSC_FALSE; 47 ierr = PetscOptionsGetBool(NULL,NULL,"-box",&flg,NULL);CHKERRQ(ierr); if (flg) st = DMDA_STENCIL_BOX; 48 flg = PETSC_FALSE; 49 ierr = PetscOptionsGetBool(NULL,NULL,"-testorder",&testorder,NULL);CHKERRQ(ierr); 50 /* 51 Test putting two nodes in x and y on each processor, exact last processor 52 in x and y gets the rest. 53 */ 54 flg = PETSC_FALSE; 55 ierr = PetscOptionsGetBool(NULL,NULL,"-distribute",&flg,NULL);CHKERRQ(ierr); 56 if (flg) { 57 if (m == PETSC_DECIDE) SETERRQ(PETSC_COMM_WORLD,PETSC_ERR_USER_INPUT,"Must set -m option with -distribute option"); 58 ierr = PetscMalloc1(m,&lx);CHKERRQ(ierr); 59 for (i=0; i<m-1; i++) { lx[i] = 4;} 60 lx[m-1] = M - 4*(m-1); 61 if (n == PETSC_DECIDE) SETERRQ(PETSC_COMM_WORLD,PETSC_ERR_USER_INPUT,"Must set -n option with -distribute option"); 62 ierr = PetscMalloc1(n,&ly);CHKERRQ(ierr); 63 for (i=0; i<n-1; i++) { ly[i] = 2;} 64 ly[n-1] = N - 2*(n-1); 65 } 66 67 /* Create distributed array and get vectors */ 68 ierr = DMDACreate2d(PETSC_COMM_WORLD,bx,by,st,M,N,m,n,w,s,lx,ly,&da);CHKERRQ(ierr); 69 ierr = DMSetFromOptions(da);CHKERRQ(ierr); 70 ierr = DMSetUp(da);CHKERRQ(ierr); 71 ierr = PetscFree(lx);CHKERRQ(ierr); 72 ierr = PetscFree(ly);CHKERRQ(ierr); 73 74 ierr = DMView(da,viewer);CHKERRQ(ierr); 75 ierr = DMCreateGlobalVector(da,&global);CHKERRQ(ierr); 76 ierr = DMCreateLocalVector(da,&local);CHKERRQ(ierr); 77 78 /* Set global vector; send ghost points to local vectors */ 79 value = 1; 80 ierr = VecSet(global,value);CHKERRQ(ierr); 81 ierr = DMGlobalToLocalBegin(da,global,INSERT_VALUES,local);CHKERRQ(ierr); 82 ierr = DMGlobalToLocalEnd(da,global,INSERT_VALUES,local);CHKERRQ(ierr); 83 84 /* Scale local vectors according to processor rank; pass to global vector */ 85 ierr = MPI_Comm_rank(PETSC_COMM_WORLD,&rank);CHKERRMPI(ierr); 86 value = rank; 87 ierr = VecScale(local,value);CHKERRQ(ierr); 88 ierr = DMLocalToGlobalBegin(da,local,INSERT_VALUES,global);CHKERRQ(ierr); 89 ierr = DMLocalToGlobalEnd(da,local,INSERT_VALUES,global);CHKERRQ(ierr); 90 91 if (!testorder) { /* turn off printing when testing ordering mappings */ 92 ierr = PetscPrintf(PETSC_COMM_WORLD,"\nGlobal Vectors:\n");CHKERRQ(ierr); 93 ierr = VecView(global,PETSC_VIEWER_STDOUT_WORLD);CHKERRQ(ierr); 94 ierr = PetscPrintf(PETSC_COMM_WORLD,"\n\n");CHKERRQ(ierr); 95 } 96 97 /* Send ghost points to local vectors */ 98 ierr = DMGlobalToLocalBegin(da,global,INSERT_VALUES,local);CHKERRQ(ierr); 99 ierr = DMGlobalToLocalEnd(da,global,INSERT_VALUES,local);CHKERRQ(ierr); 100 101 flg = PETSC_FALSE; 102 ierr = PetscOptionsGetBool(NULL,NULL,"-local_print",&flg,NULL);CHKERRQ(ierr); 103 if (flg) { 104 PetscViewer sviewer; 105 106 ierr = PetscViewerASCIIPushSynchronized(PETSC_VIEWER_STDOUT_WORLD);CHKERRQ(ierr); 107 ierr = PetscSynchronizedPrintf(PETSC_COMM_WORLD,"\nLocal Vector: processor %d\n",rank);CHKERRQ(ierr); 108 ierr = PetscViewerGetSubViewer(PETSC_VIEWER_STDOUT_WORLD,PETSC_COMM_SELF,&sviewer);CHKERRQ(ierr); 109 ierr = VecView(local,sviewer);CHKERRQ(ierr); 110 ierr = PetscViewerRestoreSubViewer(PETSC_VIEWER_STDOUT_WORLD,PETSC_COMM_SELF,&sviewer);CHKERRQ(ierr); 111 ierr = PetscViewerFlush(PETSC_VIEWER_STDOUT_WORLD);CHKERRQ(ierr); 112 ierr = PetscViewerASCIIPopSynchronized(PETSC_VIEWER_STDOUT_WORLD);CHKERRQ(ierr); 113 } 114 115 /* Tests mappings between application/PETSc orderings */ 116 if (testorder) { 117 ISLocalToGlobalMapping ltogm; 118 119 ierr = DMGetLocalToGlobalMapping(da,<ogm);CHKERRQ(ierr); 120 ierr = ISLocalToGlobalMappingGetSize(ltogm,&nloc);CHKERRQ(ierr); 121 ierr = ISLocalToGlobalMappingGetIndices(ltogm,<og);CHKERRQ(ierr); 122 ierr = DMDAGetGhostCorners(da,&Xs,&Ys,NULL,&Xm,&Ym,NULL);CHKERRQ(ierr); 123 ierr = DMDAGetAO(da,&ao);CHKERRQ(ierr); 124 ierr = PetscMalloc1(nloc,&iglobal);CHKERRQ(ierr); 125 126 /* Set iglobal to be global indices for each processor's local and ghost nodes, 127 using the DMDA ordering of grid points */ 128 kk = 0; 129 for (j=Ys; j<Ys+Ym; j++) { 130 for (i=Xs; i<Xs+Xm; i++) { 131 iloc = w*((j-Ys)*Xm + i-Xs); 132 for (l=0; l<w; l++) { 133 iglobal[kk++] = ltog[iloc+l]; 134 } 135 } 136 } 137 138 /* Map this to the application ordering (which for DMDAs is just the natural ordering 139 that would be used for 1 processor, numbering most rapidly by x, then y) */ 140 ierr = AOPetscToApplication(ao,nloc,iglobal);CHKERRQ(ierr); 141 142 /* Then map the application ordering back to the PETSc DMDA ordering */ 143 ierr = AOApplicationToPetsc(ao,nloc,iglobal);CHKERRQ(ierr); 144 145 /* Verify the mappings */ 146 kk=0; 147 for (j=Ys; j<Ys+Ym; j++) { 148 for (i=Xs; i<Xs+Xm; i++) { 149 iloc = w*((j-Ys)*Xm + i-Xs); 150 for (l=0; l<w; l++) { 151 if (iglobal[kk] != ltog[iloc+l]) { 152 ierr = PetscFPrintf(PETSC_COMM_SELF,stdout,"[%d] Problem with mapping: j=%D, i=%D, l=%D, petsc1=%D, petsc2=%D\n",rank,j,i,l,ltog[iloc+l],iglobal[kk]);CHKERRQ(ierr); 153 } 154 kk++; 155 } 156 } 157 } 158 ierr = PetscFree(iglobal);CHKERRQ(ierr); 159 ierr = ISLocalToGlobalMappingRestoreIndices(ltogm,<og);CHKERRQ(ierr); 160 } 161 162 /* Free memory */ 163 ierr = PetscViewerDestroy(&viewer);CHKERRQ(ierr); 164 ierr = VecDestroy(&local);CHKERRQ(ierr); 165 ierr = VecDestroy(&global);CHKERRQ(ierr); 166 ierr = DMDestroy(&da);CHKERRQ(ierr); 167 168 ierr = PetscFinalize(); 169 return ierr; 170 } 171 172 /*TEST 173 174 test: 175 nsize: 4 176 args: -nox 177 filter: grep -v -i Object 178 requires: x 179 180 test: 181 suffix: 2 182 args: -testorder -nox 183 requires: x 184 185 TEST*/ 186