PETSc version 3.15.5
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