PCMGSetDistinctSmoothUp#

sets the up (post) smoother to be a separate KSP from the down (pre) smoother on all levels and adds the suffix _up to the options name

Synopsis#

#include "petscksp.h" 
PetscErrorCode PCMGSetDistinctSmoothUp(PC pc)

Logically Collective

Input Parameter#

  • pc - the preconditioner context

Options Database Key#

  • -pc_mg_distinct_smoothup - use distinct smoothing objects

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.

See Also#

KSP: Linear System Solvers, PCMG, PCMGSetNumberSmooth()

Level#

advanced

Location#

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


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