petsc-master 2014-09-19
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KSPFGMRESSetModifyPC

Sets the routine used by FGMRES to modify the preconditioner.

Synopsis

#include "petscksp.h" 
PetscErrorCode  KSPFGMRESSetModifyPC(KSP ksp,PetscErrorCode (*fcn)(KSP,PetscInt,PetscInt,PetscReal,void*),void *ctx,PetscErrorCode (*d)(void*))
Logically Collective on KSP

Input Parameters

ksp - iterative context obtained from KSPCreate
fcn - modifypc function
ctx - optional contex
d - optional context destroy routine

Calling Sequence of function

ierr = int fcn(KSP ksp,int total_its,int loc_its,PetscReal res_norm,void*ctx);

ksp - the ksp context being used. total_its - the total number of FGMRES iterations that have occurred. loc_its - the number of FGMRES iterations since last restart. res_norm - the current residual norm. ctx - optional context variable

Options Database Keys

-ksp_fgmres_modifypcnochange -ksp_fgmres_modifypcksp

Contributed by Allison Baker

Notes

Several modifypc routines are predefined, including KSPFGMRESModifyPCNoChange() KSPFGMRESModifyPCKSP()

See Also

KSPFGMRESModifyPCNoChange(), KSPFGMRESModifyPCKSP()

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