petsc-master 2019-10-14
Report Typos and Errors

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.

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