#-mat_view_draw
#-draw_pause 5
#-mat_view
#-mat_ascii_output_large
#-vec_view
#-ksp_monitor 
#-ksp_error_if_not_converged
#-help
#-ksp_diagonal_scale_fix
#-ksp_type preonly
#-pc_type lu
-pc_type ilu
#-pc_view
#-pc_factor_mat_ordering_type qmd
#-ksp_view
#-pc_factor_mat_ordering_type 1wd
#-pc_factor_mat_ordering_type qmd
#-pc_factor_mat_ordering_type rowlength
#-pc_factor_mat_ordering_type natural
-pc_factor_mat_ordering_type rcm
#-ksp_max_it 1000000
#-mat_view
#-mat_view_ordering_draw
#-mat_coloring_view
#-snes_view
-snes_monitor
#-snes_type tr

#  LS type: basic, bt, l2, cp, shell
-snes_linesearch_type l2

#-on_error_attach_debugger
#-snes_max_it 30
#-snes_atol 1.e-9
#-snes_rtol 1.e-16
#-snes_stol 1.e-30
#-pc_factor_nonzeros_along_diagonal
-pc_factor_reuse_fill
-ksp_diagonal_scale
#-ksp_monitor_true_residual
-snes_converged_reason
#-snes_error_if_not_converged
#-mat_fd_type wp
#-mat_mffd_compute_normu
#-snes_mf_operator
#-snes_type test 
#-snes_test_display

