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

Input Parameters#

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

Options Database Key#

-mg_levels_ksp_max_it - Sets number of pre and post-smoothing steps

Note#

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

Level#

advanced

Location#

src/ksp/pc/impls/mg/mg.c

Examples#

src/ksp/ksp/tutorials/ex35.cxx
src/ksp/ksp/tutorials/ex36.cxx

Edit on GitLab

Index of all PC routines
Table of Contents for all manual pages
Index of all manual pages