SNESSetUpdate#

Sets the general-purpose update function called at the beginning of every iteration of the nonlinear solve. Specifically it is called just before the Jacobian is “evaluated”.

Synopsis#

#include "petscsnes.h"  
PetscErrorCode SNESSetUpdate(SNES snes, PetscErrorCode (*func)(SNES, PetscInt))

Logically Collective

Input Parameters#

snes - The nonlinear solver context
func - The function

Calling sequence of `func`#

PetscErrorCode func(SNES snes, PetscInt step);

snes - the nonlinear solver context
step - The current step of the iteration

Note#

This is NOT what one uses to update the ghost points before a function evaluation, that should be done at the beginning of your function provided to SNESSetFunction(), or SNESSetPicard() This is not used by most users.

There are a variety of function hooks one many set that are called at different stages of the nonlinear solution process, see the functions listed below.