petsc-3.9.4 2018-09-11
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KSPChebyshevEstEigSetUseNoisy

 use a noisy right hand side in order to do the estimate instead of the given right hand side

Synopsis

#include "petscksp.h" 
PetscErrorCode KSPChebyshevEstEigSetUseNoisy(KSP ksp,PetscBool use)
Logically Collective

Input Arguments

ksp - linear solver context
use - PETSC_TRUE to use noisy

Options Database

See Also

KSPChebyshevEstEigSet()

Level

intermediate

Location

src/ksp/ksp/impls/cheby/cheby.c

Implementations

KSPChebyshevEstEigSetUseNoisy_Chebyshev in src/ksp/ksp/impls/cheby/cheby.c

Index of all KSP routines
Table of Contents for all manual pages
Index of all manual pages
-ksp_chebyshev_esteig_noisy <true,false>- Notes: This alledgely works better for multigrid smoothers