petsc-master 2020-11-24
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PCHPDDMGetComplexities

Computes the grid and operator complexities.

Synopsis

#include "petscpc.h" 
static PetscErrorCode PCHPDDMGetComplexities(PC pc, PetscReal *gc, PetscReal *oc)

Input Parameter

pc - preconditioner context

Output Parameters

gc - grid complexity = sum_i(m_i) / m_1
oc - operator complexity = sum_i(nnz_i) / nnz_1

Notes

PCGAMG does not follow the usual convention and names the grid complexity what is usually referred to as the operator complexity. PCHPDDM follows what is found in the literature, and in particular, what you get with PCHYPRE and -pc_hypre_boomeramg_print_statistics.

See Also

PCMGGetGridComplexity(), PCHPDDM

Level

advanced

Location

src/ksp/pc/impls/hpddm/hpddm.cxx
Index of all PC routines
Table of Contents for all manual pages
Index of all manual pages