petsc-3.9.4 2018-09-11

PCMGSetNumberSmooth

Sets the number of pre and post-smoothing steps to use on all levels. Use PCMGDistinctSmoothUp() to create separate up and down smoothers if you want different numbers of pre- and post-smoothing steps.

Synopsis

#include "petscksp.h" 
PetscErrorCode  PCMGSetNumberSmooth(PC pc,PetscInt n)

Logically Collective on PC

Input Parameters

	mg	- the multigrid context
	n	- the number of smoothing steps

Options Database Key

Notes: this does not set a value on the coarsest grid, since we assume that there is no separate smooth up on the coarsest grid.

Keywords

MG, smooth, up, post-smoothing, steps, multigrid

Level

advanced

Location

src/ksp/pc/impls/mg/mg.c
Index of all PCMG routines
Table of Contents for all manual pages
Index of all manual pages

-mg_levels_ksp_max_it <n>

- Sets number of pre and post-smoothing steps