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 7*d71ae5a4SJacob Faibussowitsch int main(int argc, char **argv) 8*d71ae5a4SJacob Faibussowitsch { 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 17327415f7SBarry 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