petsc-master 2018-05-21
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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

Implementations

SNESNGMRESSetRestartType_NGMRES in src/snes/impls/ngmres/snesngmres.c

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