On Wed, 2007-11-28 at 09:20 +0100, Carsten Kutzner wrote: > Hadas Leonov wrote: > > After installing with openmpi - I ran some benchmarks for 4 processors > > on Mac-Pro: > > d.villin: > > Leopard performance: 13714 ps/day > > old OS performance: 41143 ps/day. > > gmx-benchmark : 48000 ps/day. > > > > d.poly-ch2 > > Leopard performance: 8640 ps/day > > old OS performance: 18000 ps/day > > gmx-benchmark: 20571 ps/day > > > > old OS refers to OSX 10.4.9. > > The slow speed also happens when running only on one CPU. d.villin took > > 6 times slower than usual. So it can't just be open-mpi fault, can it? > > > > Can it be due to compiling gromacs while disabling ia32 optimization? > Hi Hadas, > > probably you are running the C inner loops now. You will want to not > only disable the Itanium inner loops, but at the same time enable the > x86 inner loops. >
Thanks Carsten, I tried recompliing with "--enable-x86-64-sse", but it's still slow as before. Hadas. > Carsten > _______________________________________________ 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