Hello Markus, hello Bernd, > Does that mean you used SuperLU or SuperLU-Dist? In this case
No just the standard SuperLU. > Anyway, increased walltime sounds fishy. How much does it increase? On two cores the walltime increased by 27%, on four by 114%. >A good test would be to setup the AMG such that it does not do any coarsening. >Just set the first constructor parameter >CoarsenCriterion to 0. Then all AMG will do is gather the matrix on one >process and solve it directly. If that does not converge >in one step then there is definitely a problem with the parallel setup. I did as described and it works just fine. So I guess all we need is a way to tell AMG how to treat a coupled/multidomain matrix and we could run all multidomain applications in parallel. Kind regards Georg -----Ursprüngliche Nachricht----- Von: Dumux [mailto:[email protected]] Im Auftrag von Markus Blatt Gesendet: Mittwoch, 2. März 2016 11:41 An: [email protected] Betreff: Re: [DuMuX] Multidomain in parallel On Wed, Mar 02, 2016 at 11:27:41AM +0100, Markus Blatt wrote: > Hi Georg, > > On Tue, Feb 23, 2016 at 02:51:18PM +0000, [email protected] wrote: > >> We ran our multidomain application in parallel using SuperLU as > >> solver. However, this lead to an increase in wall time. > > Does that mean you used SuperLU or SuperLU-Dist? In this case I meant SuperLU-MT or SuperLU-Dist. > then it would be highly appreciated if the coupling code would > propagate upstream to DUNE. Currently, we only support the sequential > version of SuperLU there. > > Anyway, increased walltime sounds fishy. How much does it increase? > > Cheers, > > Markus > > _______________________________________________ > Dumux mailing list > [email protected] > https://listserv.uni-stuttgart.de/mailman/listinfo/dumux -- Dr. Markus Blatt - HPC-Simulation-Software & Services http://www.dr-blatt.de Hans-Bunte-Str. 8-10, 69123 Heidelberg, Germany, USt-Id: DE279960836 Tel.: +49 (0) 160 97590858 _______________________________________________ Dumux mailing list [email protected] https://listserv.uni-stuttgart.de/mailman/listinfo/dumux
