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#
KSP: Linear System Solvers, PCMG, PCMGGetLevels(), PCMGSetLevels()
Level#
advanced
Location#
Index of all PC routines
Table of Contents for all manual pages
Index of all manual pages