petsc-3.7.5 2017-01-01
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SNESNGMRESSetRestartType

 Sets the restart type for SNESNGMRES.

Synopsis

#include "petscsnes.h" 
PetscErrorCode SNESNGMRESSetRestartType(SNES snes,SNESNGMRESRestartType rtype)
Logically Collective on SNES

Input Parameters

snes - the iterative context
rtype - restart type

Options Database

-snes_ngmres_restart_type<difference,periodic,none> - set the restart type
-snes_ngmres_restart[30] - sets the number of iterations before restart for periodic

SNESNGMRESRestartTypes

SNES_NGMRES_RESTART_NONE - never restart
SNES_NGMRES_RESTART_DIFFERENCE - restart based upon difference criteria
SNES_NGMRES_RESTART_PERIODIC - restart after a fixed number of iterations

Notes

The default line search used is the L2 line search and it requires two additional function evaluations.

Keywords

SNES, SNESNGMRES, restart, type, set SNESLineSearch

Level:intermediate
Location:src/snes/impls/ngmres/snesngmres.c
Index of all SNES routines
Table of Contents for all manual pages
Index of all manual pages