SNESMonitorSet#

Sets an ADDITIONAL function that is to be used at every iteration of the nonlinear solver to display the iteration’s progress.

Synopsis#

#include "petscsnes.h"  
PetscErrorCode SNESMonitorSet(SNES snes, PetscErrorCode (*f)(SNES, PetscInt, PetscReal, void *), void *mctx, PetscErrorCode (*monitordestroy)(void **))

Logically Collective

Input Parameters#

snes - the SNES context
f - the monitor function, for the calling sequence see SNESMonitorFunction
mctx - [optional] user-defined context for private data for the monitor routine (use NULL if no context is desired)
monitordestroy - [optional] routine that frees monitor context (may be NULL)

Options Database Keys#

-snes_monitor - sets SNESMonitorDefault()
-snes_monitor draw::draw_lg - sets line graph monitor,
-snes_monitor_cancel - cancels all monitors that have been hardwired into a code by calls to SNESMonitorSet(), but does not cancel those set via the options database.

Note#

Several different monitoring routines may be set by calling SNESMonitorSet() multiple times; all will be called in the order in which they were set.

Fortran Note#

Only a single monitor function can be set for each SNES object

Level#

intermediate

Location#

src/snes/interface/snes.c

Examples#

src/snes/tutorials/ex22.c
src/snes/tutorials/ex3.c
src/ts/tutorials/ex52.c
src/ts/tutorials/ex7.c
src/snes/tutorials/ex21.c
src/ts/tutorials/ex12.c
src/snes/tutorials/ex2.c

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