Hi GMXers Some days ago I reported poor performance of GROMACS parallel runnings over Ubuntu 8.04 and software RAID in a quad-core processor. (http://www.gromacs.org/pipermail/gmx-users/2009-January/039088.html)
In a attempt to made some tests in non-raid systems running Ubuntu 8.04, I performed simulations in a dual-quad Xeon box. I ran a simulations using the 8 CPUs (8 process) and the performance was also poor, with a behavior near that observed in the quad-core (some cores with around 80% and the others with less than 30%). If I ran 8 independent simulations, all CPUs show a 100% performance. Does anyone have any experience with this Gromacs+Ubuntu poor parallel performance? I think the problem is due to the use of the generic Ubuntu standard kernel. Maybe if I recompile the kernel I can get a better performance system. However, this is just a guess, and I would like to know if anyone already had this problem and solved it. Thanks -- Alexandre Suman de Araujo Instituto de Física de São Carlos Universidade de São Paulo São Carlos - Brasil ---------------------------------------------------------------- WEBMAIL - IFSC - Instituto de FÃsica de São Carlos _______________________________________________ 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 gmx-users-requ...@gromacs.org. Can't post? Read http://www.gromacs.org/mailing_lists/users.php
