PCSetType#
Builds PC
for a particular preconditioner type
Synopsis#
#include "petscpc.h"
PetscErrorCode PCSetType(PC pc, PCType type)
Collective
Input Parameters#
pc - the preconditioner context
type - a known method, see
PCType
for possible values
Options Database Key#
-pc_type
- SetsPC
type
Notes#
Normally, it is best to use the KSPSetFromOptions()
command and
then set the PC
type from the options database rather than by using
this routine. Using the options database provides the user with
maximum flexibility in evaluating the many different preconditioners.
The PCSetType()
routine is provided for those situations where it
is necessary to set the preconditioner independently of the command
line or options database. This might be the case, for example, when
the choice of preconditioner changes during the execution of the
program, and the user’s application is taking responsibility for
choosing the appropriate preconditioner.
Developer Notes#
PCRegister()
is used to add preconditioner types to PCList
from which they
are accessed by PCSetType()
.
See Also#
KSP: Linear System Solvers, KSPSetType()
, PCType
, PCRegister()
, PCCreate()
, KSPGetPC()
Level#
intermediate
Location#
Examples#
src/tao/unconstrained/tutorials/eptorsion2.c
src/snes/tutorials/ex3.c
src/dm/impls/stag/tutorials/ex1.c
src/dm/impls/stag/tutorials/ex2.c
src/tao/pde_constrained/tutorials/hyperbolic.c
src/dm/impls/stag/tutorials/ex4.c
src/tao/constrained/tutorials/maros.c
src/dm/impls/stag/tutorials/ex3.c
src/tao/pde_constrained/tutorials/parabolic.c
src/tao/constrained/tutorials/ex1.c
Index of all PC routines
Table of Contents for all manual pages
Index of all manual pages