PCSMG#

the hypre (structured grid) SMG multigrid solver

Options Database Keys#

  • -pc_smg_its - number of iterations of SMG to use as preconditioner

  • -pc_smg_num_pre_relax - number of smoothing steps before coarse grid

  • -pc_smg_num_post_relax - number of smoothing steps after coarse grid

  • -pc_smg_tol - tolerance of SMG

Notes#

This is for CELL-centered descretizations

This must be used with the MATHYPRESTRUCT MatType.

This does not provide all the functionality of hypre’s SMG solver, it supports only one block per process defined by a PETSc DMDA.

See PCSYSPFMG, PCSMG, PCPFMG, and PCHYPRE for access to hypre’s other preconditioners

See Also#

PCMG, MATHYPRESTRUCT, PCPFMG, PCSYSPFMG, PCHYPRE, PCGAMG

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