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