1 2 static char help[] = "Tests various DM 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 PetscInt M = 10,N = 8,m = PETSC_DECIDE,n = PETSC_DECIDE; 11 PetscErrorCode ierr; 12 DM da; 13 PetscViewer viewer; 14 Vec local,global; 15 PetscScalar value; 16 17 ierr = PetscInitialize(&argc,&argv,(char*)0,help);if (ierr) return ierr; 18 ierr = PetscViewerDrawOpen(PETSC_COMM_WORLD,0,"",300,0,300,300,&viewer);CHKERRQ(ierr); 19 20 /* Read options */ 21 ierr = PetscOptionsGetInt(NULL,NULL,"-M",&M,NULL);CHKERRQ(ierr); 22 ierr = PetscOptionsGetInt(NULL,NULL,"-N",&N,NULL);CHKERRQ(ierr); 23 ierr = PetscOptionsGetInt(NULL,NULL,"-m",&m,NULL);CHKERRQ(ierr); 24 ierr = PetscOptionsGetInt(NULL,NULL,"-n",&n,NULL);CHKERRQ(ierr); 25 26 /* Create distributed array and get vectors */ 27 ierr = DMDACreate2d(PETSC_COMM_WORLD, DM_BOUNDARY_NONE, DM_BOUNDARY_NONE,DMDA_STENCIL_BOX,M,N,m,n,1,1,NULL,NULL,&da);CHKERRQ(ierr); 28 ierr = DMSetFromOptions(da);CHKERRQ(ierr); 29 ierr = DMSetUp(da);CHKERRQ(ierr); 30 ierr = DMCreateGlobalVector(da,&global);CHKERRQ(ierr); 31 ierr = DMCreateLocalVector(da,&local);CHKERRQ(ierr); 32 33 value = -3.0; 34 ierr = VecSet(global,value);CHKERRQ(ierr); 35 ierr = DMGlobalToLocalBegin(da,global,INSERT_VALUES,local);CHKERRQ(ierr); 36 ierr = DMGlobalToLocalEnd(da,global,INSERT_VALUES,local);CHKERRQ(ierr); 37 38 ierr = MPI_Comm_rank(PETSC_COMM_WORLD,&rank);CHKERRMPI(ierr); 39 value = rank+1; 40 ierr = VecScale(local,value);CHKERRQ(ierr); 41 ierr = DMLocalToGlobalBegin(da,local,ADD_VALUES,global);CHKERRQ(ierr); 42 ierr = DMLocalToGlobalEnd(da,local,ADD_VALUES,global);CHKERRQ(ierr); 43 44 ierr = VecView(global,PETSC_VIEWER_STDOUT_WORLD);CHKERRQ(ierr); 45 ierr = DMView(da,viewer);CHKERRQ(ierr); 46 47 /* Free memory */ 48 ierr = PetscViewerDestroy(&viewer);CHKERRQ(ierr); 49 ierr = VecDestroy(&local);CHKERRQ(ierr); 50 ierr = VecDestroy(&global);CHKERRQ(ierr); 51 ierr = DMDestroy(&da);CHKERRQ(ierr); 52 ierr = PetscFinalize(); 53 return ierr; 54 } 55 56 /*TEST 57 58 test: 59 nsize: 2 60 args: -nox 61 filter: grep -v -i Object 62 63 test: 64 suffix: cuda1 65 requires: cuda 66 args: -dm_vec_type cuda -nox 67 filter: grep -v -i Object 68 69 test: 70 suffix: cuda2 71 nsize: 2 72 requires: cuda 73 args: -dm_vec_type cuda -nox 74 filter: grep -v -i Object 75 76 TEST*/ 77