petsc-master 2014-09-17
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PCPFMG

the hypre PFMG multigrid solver

Options Database

-pc_pfmg_its <its> number of iterations of PFMG to use as preconditioner- . -pc_pfmg_num_pre_relax <steps> number of smoothing steps before coarse grid
-pc_pfmg_num_post_relax <steps> number of smoothing steps after coarse grid- . -pc_pfmg_tol <tol> tolerance of PFMG
-pc_pfmg_relax_type - relaxation type for the up and down cycles, one of Jacobi,Weighted-Jacobi,symmetric-Red/Black-Gauss-Seidel,Red/Black-Gauss-Seidel
-pc_pfmg_rap_type - type of coarse matrix generation, one of Galerkin,non-Galerkin

Notes: This is for CELL-centered descretizations

This must be used with the MATHYPRESTRUCT matrix type. This is less general than in hypre, it supports only one block per process defined by a PETSc DMDA.

See Also

PCMG, MATHYPRESTRUCT

Level:advanced
Location:
src/ksp/pc/impls/hypre/hypre.c
Index of all PC routines
Table of Contents for all manual pages
Index of all manual pages