petsc-3.8.4 2018-03-24

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