petsc-3.14.6 2021-03-30
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KSPSetPreSolve

Sets a function that is called before every KSPSolve() is started

Synopsis

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

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

 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()

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