petsc-3.8.4 2018-03-24

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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
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