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 *dtx)

Collective

Input Parameters

• ksp - iterative context

• n - iteration number

• rnorm - 2-norm residual value (may be estimated)

• dtx - unused convergence context

Output Parameter

• reason - KSP_CONVERGED_ITERATING or KSP_CONVERGED_ITS

Options Database Key

• -ksp_convergence_test skip - skips the test

Note

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 KSPCG or KSPBCGS. Flexible Krylov Methods

See Also

KSP: Linear System Solvers, KSP, KSPCG, KSPBCGS, KSPSetConvergenceTest(), KSPSetTolerances(), KSPSetNormType(), Flexible Krylov Methods, KSPConvergedReason

Level

advanced

Location

src/ksp/ksp/interface/iterativ.c

Examples

src/ksp/ksp/tutorials/ex71.c

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Index of all KSP routines
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Index of all manual pages