KSPFGMRESSetModifyPC#
Sets the routine used by KSPFGMRES to modify the preconditioner. Flexible Krylov Methods
Synopsis#
#include "petscksp.h"
PetscErrorCode KSPFGMRESSetModifyPC(KSP ksp, PetscErrorCode (*fcn)(KSP ksp, PetscInt total_its, PetscInt local_its, PetscReal res_norm, void *ctx), void *ctx, PetscErrorCode (*destroy)(void *ctx))
Logically Collective
Input Parameters#
ksp - iterative context obtained from
KSPCreate()fcn - modifypc function
ctx - optional context
destroy - optional context destroy routine
Calling sequence of fcn#
ksp - the ksp context being used.
total_its - the total number of FGMRES iterations that have occurred.
local_its - the number of FGMRES iterations since last restart.
res_norm - the current residual norm.
ctx - optional context variable
Calling sequence of destroy#
ctx - the function context
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, KSPFGMRESModifyPCNoChange(), KSPFGMRESModifyPCKSP()
Level#
intermediate
Location#
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