KSPSetPreSolve#

Sets a function that is called at the beginning of each KSPSolve()

Synopsis#

#include "petscksp.h" 
PetscErrorCode KSPSetPreSolve(KSP ksp, PetscErrorCode (*presolve)(KSP, Vec, Vec, void *), void *prectx)

Logically Collective

Input Parameters#

ksp - the solver object
presolve - the function to call before the solve
prectx - any context needed by the function

Calling sequence of `presolve`#

PetscErrorCode func(KSP ksp, Vec rhs, Vec x, void *ctx)

ksp - the KSP context
rhs - the right-hand side vector
x - the solution vector
ctx - optional user-provided context

See Also#

KSPSetUp(), KSPSolve(), KSPDestroy(), KSP, KSPSetPostSolve(), PCEISENSTAT

Level#

developer

Location#

src/ksp/ksp/interface/itcreate.c

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