KSPSetReusePreconditioner#
reuse the current preconditioner for future KSPSolve()
, do not construct a new preconditioner even if the Mat
operator in the KSP
has different values
Synopsis#
#include "petscksp.h"
#include "petscmat.h"
PetscErrorCode KSPSetReusePreconditioner(KSP ksp, PetscBool flag)
Collective
Input Parameters#
ksp - iterative solver obtained from
KSPCreate()
flag -
PETSC_TRUE
to reuse the current preconditioner, orPETSC_FALSE
to construct a new preconditioner
Options Database Key#
-ksp_reuse_preconditioner <true,false> - reuse the previously computed preconditioner
Note#
When using SNES
one can use SNESSetLagPreconditioner()
to determine when preconditioners are reused.
See Also#
KSP: Linear System Solvers, KSPCreate()
, KSPSolve()
, KSPDestroy()
, KSP
, KSPGetReusePreconditioner()
,
SNESSetLagPreconditioner()
, SNES
Level#
intermediate
Location#
Examples#
src/ksp/ksp/tutorials/ex6f.F90
Index of all KSP routines
Table of Contents for all manual pages
Index of all manual pages