petsc-3.14.6 2021-03-30
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KSPGCRSetModifyPC

 Sets the routine used by GCR to modify the preconditioner.

Synopsis

#include "petscksp.h" 
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

Implementations

KSPGCRSetModifyPC_GCR in src/ksp/ksp/impls/gcr/gcr.c

Index of all KSP routines
Table of Contents for all manual pages
Index of all manual pages