PCSetReusePreconditioner#
reuse the current preconditioner even if the operator in the preconditioner has changed.
Synopsis#
#include "petscksp.h"
PetscErrorCode PCSetReusePreconditioner(PC pc, PetscBool flag)
Logically Collective
Input Parameters#
pc - the preconditioner context
flag -
PETSC_TRUE
do not compute a new preconditioner,PETSC_FALSE
do compute a new preconditioner
Note#
Normally if a matrix inside a PC
changes the PC
automatically updates itself using information from the changed matrix. This option
prevents this.
See Also#
KSP: Linear System Solvers, PC
, PCGetOperators()
, MatZeroEntries()
, PCGetReusePreconditioner()
, KSPSetReusePreconditioner()
Level#
intermediate
Location#
Index of all PC routines
Table of Contents for all manual pages
Index of all manual pages