PCMGGetGridComplexity#

compute operator and grid complexity of the PCMG hierarchy

Synopsis#

#include "petscksp.h" 
PetscErrorCode PCMGGetGridComplexity(PC pc, PetscReal *gc, PetscReal *oc)

Input Parameter#

pc - the preconditioner context

Output Parameters#

gc - grid complexity = sum_i(n_i) / n_0
oc - operator complexity = sum_i(nnz_i) / nnz_0

Note#

This is often call the operator complexity in multigrid literature

See Also#

PCMG, PCMGGetLevels(), PCMGSetLevels()

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