M3D general solver options

-poisson_pc_type asm \
-poisson_pc_asm_overlap 1 \
-poisson_sub_pc_type ilu \
-poisson_sub_pc_ilu_levels 3 \
-poisson_ksp_type gmres \
 \
-poissonN_pc_type asm \
-poissonN_pc_asm_overlap 1 \
-poissonN_sub_pc_type ilu \
-poissonN_sub_pc_ilu_levels 3 \
-poissonN_ksp_type gmres \
 \ 
-xflg_nullspace \
-xpoissonN_pc_type asm  \
-xpoissonN_pc_asm_overlap 1  \
-xpoissonN_sub_pc_type icc  \
-xpoissonN_sub_pc_factor_levels 3  \
-xpoissonN_ksp_type cg \
  \
-poissonH_pc_type asm \
-poissonH_pc_asm_overlap 1 \
-poissonH_sub_pc_type ilu \
-poissonH_sub_pc_ilu_levels 3 \
-poissonH_ksp_type gmres \
 \
-pc_type asm \
-pc_asm_overlap 1 \
-sub_pc_type ilu \ 
-sub_pc_ilu_levels 3 \
-ksp_type gmres \ 
\
-poisson_ksp_view  -poisson_ksp_monitor \
-poissonN_ksp_view -poissonN_ksp_monitor \
-poissonH_ksp_view -poissonH_ksp_monitor \
-ksp_view          -ksp_monitor \