KSPPIPEGCRSetModifyPC#
Sets the routine used by KSPPIPEGCR to modify the preconditioner at each iteration
Synopsis#
#include "petscksp.h"  
PetscErrorCode KSPPIPEGCRSetModifyPC(KSP ksp, PetscErrorCode (*function)(KSP ksp, PetscInt n, PetscReal rnorm, void *ctx), void *ctx, PetscErrorCode (*destroy)(void *ctx))
Logically Collective
Input Parameters#
- ksp - iterative context obtained from - KSPCreate()
- function - user defined function to modify the preconditioner 
- ctx - user provided context for the modify preconditioner function 
- destroy - the function to use to destroy the user provided application context. 
Calling sequence of function#
- ksp - iterative context 
- n - the total number of - KSPPIPEGCRiterations that have occurred
- rnorm - 2-norm residual value 
- ctx - the user provided application context 
Calling sequence of destroy#
- ctx - the user provided application context 
Note#
The default modifypc routine is KSPPIPEGCRModifyPCNoChange()
See Also#
KSP: Linear System Solvers, KSPPIPEGCR, KSPPIPEGCRModifyPCNoChange()
Level#
intermediate
Location#
Implementations#
KSPPIPEGCRSetModifyPC_PIPEGCR() in src/ksp/ksp/impls/gcr/pipegcr/pipegcr.c
Index of all KSP routines
Table of Contents for all manual pages
Index of all manual pages