1c4762a1bSJed Brown 2c4762a1bSJed Brown static char help[] = "Tests DMGlobalToLocal() for 3d DA with stencil width of 2.\n\n"; 3c4762a1bSJed Brown 4c4762a1bSJed Brown #include <petscdm.h> 5c4762a1bSJed Brown #include <petscdmda.h> 6c4762a1bSJed Brown 7c4762a1bSJed Brown int main(int argc,char **argv) 8c4762a1bSJed Brown { 9c4762a1bSJed Brown PetscInt N = 3,M=2,P=4,dof=1,rstart,rend,i; 10c4762a1bSJed Brown PetscInt stencil_width = 2; 11c4762a1bSJed Brown PetscMPIInt rank; 12c4762a1bSJed Brown DMBoundaryType bx = DM_BOUNDARY_NONE,by = DM_BOUNDARY_NONE,bz = DM_BOUNDARY_NONE; 13c4762a1bSJed Brown DMDAStencilType stencil_type = DMDA_STENCIL_STAR; 14c4762a1bSJed Brown DM da; 15c4762a1bSJed Brown Vec global,local; 16c4762a1bSJed Brown 17*327415f7SBarry Smith PetscFunctionBeginUser; 189566063dSJacob Faibussowitsch PetscCall(PetscInitialize(&argc,&argv,(char*)0,help)); 199566063dSJacob Faibussowitsch PetscCallMPI(MPI_Comm_rank(PETSC_COMM_WORLD,&rank)); 209566063dSJacob Faibussowitsch PetscCall(PetscOptionsGetInt(NULL,NULL,"-M",&M,NULL)); 219566063dSJacob Faibussowitsch PetscCall(PetscOptionsGetInt(NULL,NULL,"-N",&N,NULL)); 229566063dSJacob Faibussowitsch PetscCall(PetscOptionsGetInt(NULL,NULL,"-P",&P,NULL)); 239566063dSJacob Faibussowitsch PetscCall(PetscOptionsGetInt(NULL,NULL,"-dof",&dof,NULL)); 249566063dSJacob Faibussowitsch PetscCall(PetscOptionsGetInt(NULL,NULL,"-stencil_width",&stencil_width,NULL)); 259566063dSJacob Faibussowitsch PetscCall(PetscOptionsGetInt(NULL,NULL,"-stencil_type",(PetscInt*)&stencil_type,NULL)); 26c4762a1bSJed Brown 279566063dSJacob Faibussowitsch PetscCall(DMDACreate3d(PETSC_COMM_WORLD,bx,by,bz,stencil_type,M,N,P,PETSC_DECIDE,PETSC_DECIDE,PETSC_DECIDE,dof,stencil_width,0,0,0,&da)); 289566063dSJacob Faibussowitsch PetscCall(DMSetFromOptions(da)); 299566063dSJacob Faibussowitsch PetscCall(DMSetUp(da)); 309566063dSJacob Faibussowitsch PetscCall(DMCreateGlobalVector(da,&global)); 319566063dSJacob Faibussowitsch PetscCall(VecGetOwnershipRange(global,&rstart,&rend)); 329566063dSJacob Faibussowitsch for (i=rstart; i<rend; i++) PetscCall(VecSetValue(global,i,(PetscReal)(i + 100*rank),INSERT_VALUES)); 339566063dSJacob Faibussowitsch PetscCall(VecAssemblyBegin(global)); 349566063dSJacob Faibussowitsch PetscCall(VecAssemblyEnd(global)); 359566063dSJacob Faibussowitsch PetscCall(DMCreateLocalVector(da,&local)); 369566063dSJacob Faibussowitsch PetscCall(VecSet(local,-1)); 379566063dSJacob Faibussowitsch PetscCall(DMGlobalToLocalBegin(da,global,INSERT_VALUES,local)); 389566063dSJacob Faibussowitsch PetscCall(DMGlobalToLocalEnd(da,global,INSERT_VALUES,local)); 399566063dSJacob Faibussowitsch if (rank == 0) PetscCall(VecView(local,0)); 409566063dSJacob Faibussowitsch PetscCall(DMDestroy(&da)); 419566063dSJacob Faibussowitsch PetscCall(VecDestroy(&local)); 429566063dSJacob Faibussowitsch PetscCall(VecDestroy(&global)); 439566063dSJacob Faibussowitsch PetscCall(PetscFinalize()); 44b122ec5aSJacob Faibussowitsch return 0; 45c4762a1bSJed Brown } 46