petsc-3.4.5 2014-06-29
KSPGCRSetModifyPC
Sets the routine used by GCR to modify the preconditioner.
Synopsis
PetscErrorCode KSPGCRSetModifyPC(KSP ksp,PetscErrorCode (*function)(KSP,PetscInt,PetscReal,void*),void *data,PetscErrorCode (*destroy)(void*))
Logically Collective on KSP
Input Parameters
+ ksp - iterative context obtained from KSPCreate()
. function - user defined function to modify the preconditioner
. ctx - user provided contex for the modify preconditioner function
- destroy - the function to use to destroy the user provided application context.
Calling Sequence of function
PetscErrorCode function (KSP ksp, PetscInt n, PetscReal rnorm, void *ctx)
ksp - iterative context
n - the total number of GCR iterations that have occurred
rnorm - 2-norm residual value
ctx - the user provided application context
Notes
The default modifypc routine is KSPGCRModifyPCNoChange()
.seealso: KSPGCRModifyPCNoChange()
Level:intermediate
Location:src/ksp/ksp/impls/gcr/gcr.c
Index of all KSP routines
Table of Contents for all manual pages
Index of all manual pages