[petsc-users] GAMG speed

[Jed Brown]

Michele Rosso <mrosso at uci.edu> writes:
> The matrix arises from discretization of the Poisson equation in 
> incompressible flow calculations.

Can you try the two runs below and send -log_summary?

  -log_summary -ksp_monitor -ksp_view -ksp_converged_reason -pc_type mg -pc_mg_galerkin -pc_mg_levels 5 -mg_levels_ksp_type richardson -mg_levels_ksp_max_it 1


  -log_summary -ksp_monitor -ksp_view -ksp_converged_reason -pc_type mg -pc_mg_galerkin -pc_mg_levels 5 -mg_levels_ksp_type richardson -mg_levels_ksp_max_it 1 -pc_mg_type full
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