mpirun -np 32 ./ex_dmda \
	-prop_steps 10 \
	-ts_type cn \
	-ksp_type fgmres \
	-ksp_rtol 1e-5 \
	-pc_type gamg \
	-pc_gamg_type agg \
	-pc_gamg_threshold -0.0 \
	-pc_gamg_coarse_eq_limit 1000 \
	-pc_gamg_use_parallel_coarse_grid_solver \
	-pc_gamg_square_graph 10 \
	-mg_levels_ksp_type gmres \
	-mg_levels_pc_type jacobi \
	-pc_gamg_reuse_interpolation true \
	-ts_monitor -log_view &> log_gamg