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 snes, PetscInt step))

Logically Collective

Input Parameters#

  • snes - The nonlinear solver context

  • func - The function

Calling sequence of func#

  • snes - the nonlinear solver context

  • step - The current step of the iteration

Notes#

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.

See Also#

SNES: Nonlinear Solvers, SNES, SNESSolve(), SNESSetJacobian(), SNESLineSearchSetPreCheck(), SNESLineSearchSetPostCheck(), SNESNewtonTRSetPreCheck(), SNESNewtonTRSetPostCheck(), SNESMonitorSet(), SNESSetDivergenceTest()

Level#

advanced

Location#

src/snes/interface/snes.c

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