221         Vec                true_diag;  in PCSetUp_Jacobi()  local
222         PetscCall(VecDuplicate(diag, &true_diag));  in PCSetUp_Jacobi()
223         PetscCall(MatGetDiagonal(pc->pmat, true_diag));  in PCSetUp_Jacobi()
226         PetscCall(VecGetArrayRead(true_diag, &x)); // to make more general -todo  in PCSetUp_Jacobi()
233         PetscCall(VecRestoreArrayRead(true_diag, &x));  in PCSetUp_Jacobi()
236         PetscCall(VecDestroy(&true_diag));  in PCSetUp_Jacobi()
239         Vec true_diag;  in PCSetUp_Jacobi()  local
240         PetscCall(VecDuplicate(diag, &true_diag));  in PCSetUp_Jacobi()
241         PetscCall(MatGetDiagonal(pc->pmat, true_diag));  in PCSetUp_Jacobi()
242         PetscCall(VecAXPY(diag, -1, true_diag)); // subtract off diag  in PCSetUp_Jacobi()
244         PetscCall(VecAXPY(diag, 1, true_diag));  // add diag back in  in PCSetUp_Jacobi()
245         PetscCall(VecDestroy(&true_diag));  in PCSetUp_Jacobi()