petsc-master 2019-11-11
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KSPConvergedSkip

Convergence test that do not return as converged until the maximum number of iterations is reached.

Synopsis

#include "petscksp.h" 
PetscErrorCode  KSPConvergedSkip(KSP ksp,PetscInt n,PetscReal rnorm,KSPConvergedReason *reason,void *dummy)
Collective on ksp

Input Parameters

ksp - iterative context
n - iteration number
rnorm - 2-norm residual value (may be estimated)
dummy - unused convergence context

Returns

reason -KSP_CONVERGED_ITERATING, KSP_CONVERGED_ITS

Notes

This should be used as the convergence test with the option KSPSetNormType(ksp,KSP_NORM_NONE), since norms of the residual are not computed. Convergence is then declared after the maximum number of iterations have been reached. Useful when one is using CG or BiCGStab as a smoother.

See Also

KSPSetConvergenceTest(), KSPSetTolerances(), KSPSetNormType()

Level

advanced

Location

src/ksp/ksp/interface/iterativ.c

Examples

src/ksp/ksp/examples/tutorials/ex71.c.html

Index of all KSP routines
Table of Contents for all manual pages
Index of all manual pages