1 static char help[] = "Tests MAIJ matrix for large DOF\n\n"; 2 3 #include <petscdm.h> 4 #include <petscdmda.h> 5 6 int main(int argc, char *argv[]) 7 { 8 Mat M; 9 Vec x, y; 10 DM da, daf; 11 12 PetscFunctionBeginUser; 13 PetscCall(PetscInitialize(&argc, &argv, 0, help)); 14 PetscCall(DMDACreate2d(PETSC_COMM_WORLD, DM_BOUNDARY_NONE, DM_BOUNDARY_NONE, DMDA_STENCIL_STAR, 4, 5, PETSC_DECIDE, PETSC_DECIDE, 41, 1, 0, 0, &da)); 15 PetscCall(DMSetFromOptions(da)); 16 PetscCall(DMSetUp(da)); 17 PetscCall(DMRefine(da, PETSC_COMM_WORLD, &daf)); 18 PetscCall(DMCreateInterpolation(da, daf, &M, NULL)); 19 PetscCall(DMCreateGlobalVector(da, &x)); 20 PetscCall(DMCreateGlobalVector(daf, &y)); 21 22 PetscCall(MatMult(M, x, y)); 23 PetscCall(MatMultTranspose(M, y, x)); 24 PetscCall(DMDestroy(&da)); 25 PetscCall(DMDestroy(&daf)); 26 PetscCall(VecDestroy(&x)); 27 PetscCall(VecDestroy(&y)); 28 PetscCall(MatDestroy(&M)); 29 PetscCall(PetscFinalize()); 30 return 0; 31 } 32 33 /*TEST 34 35 test: 36 nsize: 2 37 output_file: output/empty.out 38 39 TEST*/ 40