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 Mat M; 8 Vec x, y; 9 DM da, daf; 10 11 PetscFunctionBeginUser; 12 PetscCall(PetscInitialize(&argc, &argv, 0, help)); 13 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)); 14 PetscCall(DMSetFromOptions(da)); 15 PetscCall(DMSetUp(da)); 16 PetscCall(DMRefine(da, PETSC_COMM_WORLD, &daf)); 17 PetscCall(DMCreateInterpolation(da, daf, &M, NULL)); 18 PetscCall(DMCreateGlobalVector(da, &x)); 19 PetscCall(DMCreateGlobalVector(daf, &y)); 20 21 PetscCall(MatMult(M, x, y)); 22 PetscCall(MatMultTranspose(M, y, x)); 23 PetscCall(DMDestroy(&da)); 24 PetscCall(DMDestroy(&daf)); 25 PetscCall(VecDestroy(&x)); 26 PetscCall(VecDestroy(&y)); 27 PetscCall(MatDestroy(&M)); 28 PetscCall(PetscFinalize()); 29 return 0; 30 } 31 32 /*TEST 33 34 test: 35 nsize: 2 36 37 TEST*/ 38