Tiago Marques wrote: > Hi! > > I've been using Gromacs on dual-socket quad-core Xeons with 8GiB of RAM, > connected with Gigabit Ethernet and I always seem to have problems scaling > to more than a node. > > When I run a test on 16 cores, it does run but the result is often slower > than when running on only 8 cores on the same machine. The best result I've > managed is not being slower than 8 cores on 16. > > What am I missing here, or are the tests inappropriate to run over more than > one machine?
How large is your system? Which gromacs version are you using? And have a look at the messages by Carsten Kutzner in this list, he wrote a lot on gromacs scaling. Jochen > > Best regards, > > Tiago Marques > > > > ------------------------------------------------------------------------ > > _______________________________________________ > gmx-users mailing list gmx-users@gromacs.org > http://www.gromacs.org/mailman/listinfo/gmx-users > Please search the archive at http://www.gromacs.org/search before posting! > Please don't post (un)subscribe requests to the list. Use the > www interface or send it to [EMAIL PROTECTED] > Can't post? Read http://www.gromacs.org/mailing_lists/users.php -- ************************************************ Dr. Jochen Hub Max Planck Institute for Biophysical Chemistry Computational biomolecular dynamics group Am Fassberg 11 D-37077 Goettingen, Germany Email: jhub[at]gwdg.de Tel.: +49 (0)551 201-2312 ************************************************ _______________________________________________ gmx-users mailing list gmx-users@gromacs.org http://www.gromacs.org/mailman/listinfo/gmx-users Please search the archive at http://www.gromacs.org/search before posting! Please don't post (un)subscribe requests to the list. Use the www interface or send it to [EMAIL PROTECTED] Can't post? Read http://www.gromacs.org/mailing_lists/users.php