Number of iterations for ASM and BJACOBI preconditioners

Matthew Knepley knepley at gmail.com
Tue Jul 3 09:53:46 CDT 2007


On 7/3/07, Tim Kröger <tim at cevis.uni-bremen.de> wrote:
> Dear all,
>
> For the ASM and BJACOBI preconditioners, I wonder how I can adjust the
> number of iterations to be used.  I don't find an appropriate option
> (nor a tolerance option).

For the default setup, you would use -sub_ksp_max_it <its> since both
PCs set the options prefix of their local solvers to "sub_".

  Matt

> Best Regards,
>
> Tim
>
> --
> Dr. Tim Kroeger                            Phone +49-421-218-7710
> tim at mevis.de, tim at cevis.uni-bremen.de      Fax   +49-421-218-4236
>
> MeVis Research GmbH, Universitaetsallee 29, D-28359 Bremen, Germany
>
> Amtsgericht Bremen HRB 16222
> Geschaeftsfuehrer: Prof. Dr. H.-O. Peitgen
>
>


-- 
What most experimenters take for granted before they begin their
experiments is infinitely more interesting than any results to which
their experiments lead.
-- Norbert Wiener




More information about the petsc-users mailing list