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/tutorials/ex71.c.html


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