KSPSetPreSolve#

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

Synopsis#

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

Logically Collective

Input Parameters#

  • ksp - the solver object

  • presolve - the function to call before the solve

  • ctx - any context needed by the function

Calling sequence of presolve#

  • ksp - the KSP context

  • rhs - the right-hand side vector

  • x - the solution vector

  • ctx - optional user-provided context

See Also#

KSP: Linear System Solvers, 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