1c4762a1bSJed Brown 2c4762a1bSJed Brown static char help[] = "Tests DMDAGlobalToNaturalAllCreate() using contour plotting for 2d DMDAs.\n\n"; 3c4762a1bSJed Brown 4c4762a1bSJed Brown #include <petscdm.h> 5c4762a1bSJed Brown #include <petscdmda.h> 6c4762a1bSJed Brown #include <petscdraw.h> 7c4762a1bSJed Brown 8c4762a1bSJed Brown int main(int argc,char **argv) 9c4762a1bSJed Brown { 10c4762a1bSJed Brown PetscInt i,j,M = 10,N = 8,m = PETSC_DECIDE,n = PETSC_DECIDE; 11c4762a1bSJed Brown PetscMPIInt rank; 12c4762a1bSJed Brown PetscErrorCode ierr; 13c4762a1bSJed Brown PetscBool flg = PETSC_FALSE; 14c4762a1bSJed Brown DM da; 15c4762a1bSJed Brown PetscViewer viewer; 16c4762a1bSJed Brown Vec localall,global; 17c4762a1bSJed Brown PetscScalar value,*vlocal; 18c4762a1bSJed Brown DMBoundaryType bx = DM_BOUNDARY_NONE,by = DM_BOUNDARY_NONE; 19c4762a1bSJed Brown DMDAStencilType stype = DMDA_STENCIL_BOX; 20c4762a1bSJed Brown VecScatter tolocalall,fromlocalall; 21c4762a1bSJed Brown PetscInt start,end; 22c4762a1bSJed Brown 23c4762a1bSJed Brown ierr = PetscInitialize(&argc,&argv,(char*)0,help);if (ierr) return ierr; 24*5f80ce2aSJacob Faibussowitsch CHKERRQ(PetscViewerDrawOpen(PETSC_COMM_WORLD,0,"",300,0,300,300,&viewer)); 25c4762a1bSJed Brown 26c4762a1bSJed Brown /* Read options */ 27*5f80ce2aSJacob Faibussowitsch CHKERRQ(PetscOptionsGetInt(NULL,NULL,"-M",&M,NULL)); 28*5f80ce2aSJacob Faibussowitsch CHKERRQ(PetscOptionsGetInt(NULL,NULL,"-N",&N,NULL)); 29*5f80ce2aSJacob Faibussowitsch CHKERRQ(PetscOptionsGetInt(NULL,NULL,"-m",&m,NULL)); 30*5f80ce2aSJacob Faibussowitsch CHKERRQ(PetscOptionsGetInt(NULL,NULL,"-n",&n,NULL)); 31*5f80ce2aSJacob Faibussowitsch CHKERRQ(PetscOptionsGetBool(NULL,NULL,"-star_stencil",&flg,NULL)); 32c4762a1bSJed Brown if (flg) stype = DMDA_STENCIL_STAR; 33c4762a1bSJed Brown 34c4762a1bSJed Brown /* Create distributed array and get vectors */ 35*5f80ce2aSJacob Faibussowitsch CHKERRQ(DMDACreate2d(PETSC_COMM_WORLD,bx,by,stype,M,N,m,n,1,1,NULL,NULL,&da)); 36*5f80ce2aSJacob Faibussowitsch CHKERRQ(DMSetFromOptions(da)); 37*5f80ce2aSJacob Faibussowitsch CHKERRQ(DMSetUp(da)); 38c4762a1bSJed Brown 39*5f80ce2aSJacob Faibussowitsch CHKERRQ(DMCreateGlobalVector(da,&global)); 40*5f80ce2aSJacob Faibussowitsch CHKERRQ(VecCreateSeq(PETSC_COMM_SELF,M*N,&localall)); 41c4762a1bSJed Brown 42*5f80ce2aSJacob Faibussowitsch CHKERRMPI(MPI_Comm_rank(PETSC_COMM_WORLD,&rank)); 43*5f80ce2aSJacob Faibussowitsch CHKERRQ(VecGetOwnershipRange(global,&start,&end)); 44c4762a1bSJed Brown for (i=start; i<end; i++) { 45c4762a1bSJed Brown value = 5.0*rank; 46*5f80ce2aSJacob Faibussowitsch CHKERRQ(VecSetValues(global,1,&i,&value,INSERT_VALUES)); 47c4762a1bSJed Brown } 48*5f80ce2aSJacob Faibussowitsch CHKERRQ(VecView(global,viewer)); 49c4762a1bSJed Brown 50c4762a1bSJed Brown /* 51c4762a1bSJed Brown Create Scatter from global DMDA parallel vector to local vector that 52c4762a1bSJed Brown contains all entries 53c4762a1bSJed Brown */ 54*5f80ce2aSJacob Faibussowitsch CHKERRQ(DMDAGlobalToNaturalAllCreate(da,&tolocalall)); 55*5f80ce2aSJacob Faibussowitsch CHKERRQ(DMDANaturalAllToGlobalCreate(da,&fromlocalall)); 56c4762a1bSJed Brown 57*5f80ce2aSJacob Faibussowitsch CHKERRQ(VecScatterBegin(tolocalall,global,localall,INSERT_VALUES,SCATTER_FORWARD)); 58*5f80ce2aSJacob Faibussowitsch CHKERRQ(VecScatterEnd(tolocalall,global,localall,INSERT_VALUES,SCATTER_FORWARD)); 59c4762a1bSJed Brown 60*5f80ce2aSJacob Faibussowitsch CHKERRQ(VecGetArray(localall,&vlocal)); 61c4762a1bSJed Brown for (j=0; j<N; j++) { 62c4762a1bSJed Brown for (i=0; i<M; i++) { 63c4762a1bSJed Brown *vlocal++ += i + j*M; 64c4762a1bSJed Brown } 65c4762a1bSJed Brown } 66*5f80ce2aSJacob Faibussowitsch CHKERRQ(VecRestoreArray(localall,&vlocal)); 67c4762a1bSJed Brown 68c4762a1bSJed Brown /* scatter back to global vector */ 69*5f80ce2aSJacob Faibussowitsch CHKERRQ(VecScatterBegin(fromlocalall,localall,global,INSERT_VALUES,SCATTER_FORWARD)); 70*5f80ce2aSJacob Faibussowitsch CHKERRQ(VecScatterEnd(fromlocalall,localall,global,INSERT_VALUES,SCATTER_FORWARD)); 71c4762a1bSJed Brown 72*5f80ce2aSJacob Faibussowitsch CHKERRQ(VecView(global,viewer)); 73c4762a1bSJed Brown 74c4762a1bSJed Brown /* Free memory */ 75*5f80ce2aSJacob Faibussowitsch CHKERRQ(VecScatterDestroy(&tolocalall)); 76*5f80ce2aSJacob Faibussowitsch CHKERRQ(VecScatterDestroy(&fromlocalall)); 77*5f80ce2aSJacob Faibussowitsch CHKERRQ(PetscViewerDestroy(&viewer)); 78*5f80ce2aSJacob Faibussowitsch CHKERRQ(VecDestroy(&localall)); 79*5f80ce2aSJacob Faibussowitsch CHKERRQ(VecDestroy(&global)); 80*5f80ce2aSJacob Faibussowitsch CHKERRQ(DMDestroy(&da)); 81c4762a1bSJed Brown ierr = PetscFinalize(); 82c4762a1bSJed Brown return ierr; 83c4762a1bSJed Brown } 84c4762a1bSJed Brown 85c4762a1bSJed Brown /*TEST 86c4762a1bSJed Brown 87c4762a1bSJed Brown build: 88c4762a1bSJed Brown requires: !complex 89c4762a1bSJed Brown 90c4762a1bSJed Brown test: 91c4762a1bSJed Brown nsize: 3 92c4762a1bSJed Brown 93c4762a1bSJed Brown TEST*/ 94