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 CHKERRQ(PetscViewerDrawOpen(PETSC_COMM_WORLD,0,"",300,0,300,300,&viewer)); 19 20 /* Read options */ 21 CHKERRQ(PetscOptionsGetInt(NULL,NULL,"-M",&M,NULL)); 22 CHKERRQ(PetscOptionsGetInt(NULL,NULL,"-N",&N,NULL)); 23 CHKERRQ(PetscOptionsGetInt(NULL,NULL,"-m",&m,NULL)); 24 CHKERRQ(PetscOptionsGetInt(NULL,NULL,"-n",&n,NULL)); 25 26 /* Create distributed array and get vectors */ 27 CHKERRQ(DMDACreate2d(PETSC_COMM_WORLD, DM_BOUNDARY_NONE, DM_BOUNDARY_NONE,DMDA_STENCIL_BOX,M,N,m,n,1,1,NULL,NULL,&da)); 28 CHKERRQ(DMSetFromOptions(da)); 29 CHKERRQ(DMSetUp(da)); 30 CHKERRQ(DMCreateGlobalVector(da,&global)); 31 CHKERRQ(DMCreateLocalVector(da,&local)); 32 33 value = -3.0; 34 CHKERRQ(VecSet(global,value)); 35 CHKERRQ(DMGlobalToLocalBegin(da,global,INSERT_VALUES,local)); 36 CHKERRQ(DMGlobalToLocalEnd(da,global,INSERT_VALUES,local)); 37 38 CHKERRMPI(MPI_Comm_rank(PETSC_COMM_WORLD,&rank)); 39 value = rank+1; 40 CHKERRQ(VecScale(local,value)); 41 CHKERRQ(DMLocalToGlobalBegin(da,local,ADD_VALUES,global)); 42 CHKERRQ(DMLocalToGlobalEnd(da,local,ADD_VALUES,global)); 43 44 CHKERRQ(VecView(global,PETSC_VIEWER_STDOUT_WORLD)); 45 CHKERRQ(DMView(da,viewer)); 46 47 /* Free memory */ 48 CHKERRQ(PetscViewerDestroy(&viewer)); 49 CHKERRQ(VecDestroy(&local)); 50 CHKERRQ(VecDestroy(&global)); 51 CHKERRQ(DMDestroy(&da)); 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