KSPFGMRESSetModifyPC#

Sets the routine used by KSPFGMRES to modify the preconditioner. Flexible Krylov Methods

Synopsis#

#include "petscksp.h" 
PetscErrorCode KSPFGMRESSetModifyPC(KSP ksp, KSPFlexibleModifyPCFn *fcn, void *ctx, PetscCtxDestroyFn *destroy)

Logically Collective

Input Parameters#

ksp - iterative context obtained from KSPCreate()
fcn - function to modify the PC, see KSPFlexibleModifyPCFn
ctx - optional context
destroy - optional context destroy routine

Options Database Keys#

-ksp_fgmres_modifypcnochange - do not change the PC
-ksp_fgmres_modifypcksp - changes the inner KSP solver tolerances

Note#

Several fcn routines are predefined, including KSPFGMRESModifyPCNoChange() and KSPFGMRESModifyPCKSP()

See Also#

KSP: Linear System Solvers, Flexible Krylov Methods, KSPFGMRES, KSPFlexibleModifyPCFn, KSPFlexibleSetModifyPC(), KSPFGMRESModifyPCNoChange(), KSPFGMRESModifyPCKSP()

Level#

intermediate

Location#

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

Implementations#

KSPFGMRESSetModifyPC_FGMRES() in src/ksp/ksp/impls/gmres/fgmres/fgmres.c

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