KSPFlexibleModifyPCKSP#

modifies the attributes of the PCKSP preconditioner, see Flexible Krylov Methods.

Synopsis#

#include "petscksp.h" 
PetscErrorCode KSPFlexibleModifyPCKSP(KSP ksp, PetscInt total_its, PetscInt loc_its, PetscReal res_norm, PetscCtx ctx)

Input Parameters#

ksp - the ksp context being used.
total_its - the total number of KSP iterations that have occurred.
loc_its - the number of KSP iterations since last restart.
res_norm - the current residual norm.
ctx - context, unused in this routine

Notes#

You can use this as a template for writing a custom modification callback. See the source code for the change it makes.

You can provide this to a KSP with KSPFlexibleSetModifyPC()

See Also#

KSP: Linear System Solvers, Flexible Krylov Methods, KSPFGMRES, KSPFCG, KSPPIPEFCG, KSPGCR, KSPPIPEGCR, KSPFlexibleModifyPCFn, KSPFlexibleSetModifyPC()

Level#

intermediate

Location#

src/ksp/ksp/impls/gmres/fgmres/modpcf.c

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