SNESMonitorRatio#
Monitors progress of the SNES
solvers by printing the ratio of residual norm at each iteration to the previous.
Synopsis#
#include "petsc/private/snesimpl.h"
PetscErrorCode SNESMonitorRatio(SNES snes, PetscInt its, PetscReal fgnorm, PetscViewerAndFormat *vf)
Collective
Input Parameters#
snes - the
SNES
contextits - iteration number
fgnorm - 2-norm of residual (or gradient)
dummy - context of monitor
Options Database Key#
-snes_monitor_ratio - activate this monitor
Notes#
This is not called directly by users, rather one calls SNESMonitorSet()
, with this function as an argument, to cause the monitor
to be used during the SNES
solve.
Be sure to call SNESMonitorRationSetUp()
before using this monitor.
See Also#
SNES: Nonlinear Solvers, SNESMonitorRationSetUp()
, SNESMonitorSet()
, SNESMonitorSolution()
, SNESMonitorDefault()
, PetscViewerFormat
, PetscViewerAndFormat
Level#
intermediate
Location#
Index of all SNES routines
Table of Contents for all manual pages
Index of all manual pages