1*c4762a1bSJed Brown 2*c4762a1bSJed Brown static char help[] = "Tests DMDAGlobalToNaturalAllCreate() using contour plotting for 2d DMDAs.\n\n"; 3*c4762a1bSJed Brown 4*c4762a1bSJed Brown 5*c4762a1bSJed Brown #include <petscdm.h> 6*c4762a1bSJed Brown #include <petscdmda.h> 7*c4762a1bSJed Brown #include <petscdraw.h> 8*c4762a1bSJed Brown 9*c4762a1bSJed Brown int main(int argc,char **argv) 10*c4762a1bSJed Brown { 11*c4762a1bSJed Brown PetscInt i,j,M = 10,N = 8,m = PETSC_DECIDE,n = PETSC_DECIDE; 12*c4762a1bSJed Brown PetscMPIInt rank; 13*c4762a1bSJed Brown PetscErrorCode ierr; 14*c4762a1bSJed Brown PetscBool flg = PETSC_FALSE; 15*c4762a1bSJed Brown DM da; 16*c4762a1bSJed Brown PetscViewer viewer; 17*c4762a1bSJed Brown Vec localall,global; 18*c4762a1bSJed Brown PetscScalar value,*vlocal; 19*c4762a1bSJed Brown DMBoundaryType bx = DM_BOUNDARY_NONE,by = DM_BOUNDARY_NONE; 20*c4762a1bSJed Brown DMDAStencilType stype = DMDA_STENCIL_BOX; 21*c4762a1bSJed Brown VecScatter tolocalall,fromlocalall; 22*c4762a1bSJed Brown PetscInt start,end; 23*c4762a1bSJed Brown 24*c4762a1bSJed Brown ierr = PetscInitialize(&argc,&argv,(char*)0,help);if (ierr) return ierr; 25*c4762a1bSJed Brown ierr = PetscViewerDrawOpen(PETSC_COMM_WORLD,0,"",300,0,300,300,&viewer);CHKERRQ(ierr); 26*c4762a1bSJed Brown 27*c4762a1bSJed Brown /* Read options */ 28*c4762a1bSJed Brown ierr = PetscOptionsGetInt(NULL,NULL,"-M",&M,NULL);CHKERRQ(ierr); 29*c4762a1bSJed Brown ierr = PetscOptionsGetInt(NULL,NULL,"-N",&N,NULL);CHKERRQ(ierr); 30*c4762a1bSJed Brown ierr = PetscOptionsGetInt(NULL,NULL,"-m",&m,NULL);CHKERRQ(ierr); 31*c4762a1bSJed Brown ierr = PetscOptionsGetInt(NULL,NULL,"-n",&n,NULL);CHKERRQ(ierr); 32*c4762a1bSJed Brown ierr = PetscOptionsGetBool(NULL,NULL,"-star_stencil",&flg,NULL);CHKERRQ(ierr); 33*c4762a1bSJed Brown if (flg) stype = DMDA_STENCIL_STAR; 34*c4762a1bSJed Brown 35*c4762a1bSJed Brown /* Create distributed array and get vectors */ 36*c4762a1bSJed Brown ierr = DMDACreate2d(PETSC_COMM_WORLD,bx,by,stype,M,N,m,n,1,1,NULL,NULL,&da);CHKERRQ(ierr); 37*c4762a1bSJed Brown ierr = DMSetFromOptions(da);CHKERRQ(ierr); 38*c4762a1bSJed Brown ierr = DMSetUp(da);CHKERRQ(ierr); 39*c4762a1bSJed Brown 40*c4762a1bSJed Brown ierr = DMCreateGlobalVector(da,&global);CHKERRQ(ierr); 41*c4762a1bSJed Brown ierr = VecCreateSeq(PETSC_COMM_SELF,M*N,&localall);CHKERRQ(ierr); 42*c4762a1bSJed Brown 43*c4762a1bSJed Brown ierr = MPI_Comm_rank(PETSC_COMM_WORLD,&rank);CHKERRQ(ierr); 44*c4762a1bSJed Brown ierr = VecGetOwnershipRange(global,&start,&end);CHKERRQ(ierr); 45*c4762a1bSJed Brown for (i=start; i<end; i++) { 46*c4762a1bSJed Brown value = 5.0*rank; 47*c4762a1bSJed Brown ierr = VecSetValues(global,1,&i,&value,INSERT_VALUES);CHKERRQ(ierr); 48*c4762a1bSJed Brown } 49*c4762a1bSJed Brown ierr = VecView(global,viewer);CHKERRQ(ierr); 50*c4762a1bSJed Brown 51*c4762a1bSJed Brown /* 52*c4762a1bSJed Brown Create Scatter from global DMDA parallel vector to local vector that 53*c4762a1bSJed Brown contains all entries 54*c4762a1bSJed Brown */ 55*c4762a1bSJed Brown ierr = DMDAGlobalToNaturalAllCreate(da,&tolocalall);CHKERRQ(ierr); 56*c4762a1bSJed Brown ierr = DMDANaturalAllToGlobalCreate(da,&fromlocalall);CHKERRQ(ierr); 57*c4762a1bSJed Brown 58*c4762a1bSJed Brown ierr = VecScatterBegin(tolocalall,global,localall,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 59*c4762a1bSJed Brown ierr = VecScatterEnd(tolocalall,global,localall,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 60*c4762a1bSJed Brown 61*c4762a1bSJed Brown ierr = VecGetArray(localall,&vlocal);CHKERRQ(ierr); 62*c4762a1bSJed Brown for (j=0; j<N; j++) { 63*c4762a1bSJed Brown for (i=0; i<M; i++) { 64*c4762a1bSJed Brown *vlocal++ += i + j*M; 65*c4762a1bSJed Brown } 66*c4762a1bSJed Brown } 67*c4762a1bSJed Brown ierr = VecRestoreArray(localall,&vlocal);CHKERRQ(ierr); 68*c4762a1bSJed Brown 69*c4762a1bSJed Brown /* scatter back to global vector */ 70*c4762a1bSJed Brown ierr = VecScatterBegin(fromlocalall,localall,global,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 71*c4762a1bSJed Brown ierr = VecScatterEnd(fromlocalall,localall,global,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr); 72*c4762a1bSJed Brown 73*c4762a1bSJed Brown ierr = VecView(global,viewer);CHKERRQ(ierr); 74*c4762a1bSJed Brown 75*c4762a1bSJed Brown /* Free memory */ 76*c4762a1bSJed Brown ierr = VecScatterDestroy(&tolocalall);CHKERRQ(ierr); 77*c4762a1bSJed Brown ierr = VecScatterDestroy(&fromlocalall);CHKERRQ(ierr); 78*c4762a1bSJed Brown ierr = PetscViewerDestroy(&viewer);CHKERRQ(ierr); 79*c4762a1bSJed Brown ierr = VecDestroy(&localall);CHKERRQ(ierr); 80*c4762a1bSJed Brown ierr = VecDestroy(&global);CHKERRQ(ierr); 81*c4762a1bSJed Brown ierr = DMDestroy(&da);CHKERRQ(ierr); 82*c4762a1bSJed Brown ierr = PetscFinalize(); 83*c4762a1bSJed Brown return ierr; 84*c4762a1bSJed Brown } 85*c4762a1bSJed Brown 86*c4762a1bSJed Brown 87*c4762a1bSJed Brown 88*c4762a1bSJed Brown /*TEST 89*c4762a1bSJed Brown 90*c4762a1bSJed Brown build: 91*c4762a1bSJed Brown requires: !complex 92*c4762a1bSJed Brown 93*c4762a1bSJed Brown test: 94*c4762a1bSJed Brown nsize: 3 95*c4762a1bSJed Brown 96*c4762a1bSJed Brown TEST*/ 97