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


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Index of all PC routines
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Index of all manual pages