Yes. You can run with -poisson_ksp_view and -options_left to make sure the options you provide are actually used.
Barry On Mar 17, 2014, at 9:39 AM, TAY wee-beng <[email protected]> wrote: > Hi, > > I use > > call KSPSetOptionsPrefix(ksp_semi_xyz,"momentum_",ierr) > > and > > call KSPSetOptionsPrefix(ksp,"poisson_",ierr) > > so that I can choose separate ksp/pc options for my momentum and poisson > equations through command line e.g. > > -poisson_ksp_type gmres -poisson_pc_type hypre -poisson_pc_type_hypre > boomeramg > > In general, I need to use boomeramg as the preconditioner and gmres as the > solver for my poisson eqn, separate from my momentum eqn, which has its own > default pc and ksp. Is the above the correct way? > > Thanks! > > -- > Yours sincerely, > > TAY wee-beng >
