-pc_syspfmg_its <its> | - number of iterations of SysPFMG to use as preconditioner | |
-pc_syspfmg_num_pre_relax <steps> | - number of smoothing steps before coarse grid | |
-pc_syspfmg_num_post_relax <steps> | - number of smoothing steps after coarse grid | |
-pc_syspfmg_tol <tol> | - tolerance of SysPFMG | |
-pc_syspfmg_relax_type <Weighted | - Jacobi,Red/Black-Gauss-Seidel> - relaxation type for the up and down cycles |
This must be used with the MATHYPRESSTRUCT matrix type. This is less general than in hypre, it supports only one part, and one block per process defined by a PETSc DMDA. Also, only cell-centered variables.