[gmx-users] Gromacs slow and crashes on Leopard.
ckutzne at gwdg.de
Wed Nov 28 09:20:28 CET 2007
Hadas Leonov wrote:
> After installing with openmpi - I ran some benchmarks for 4 processors
> on Mac-Pro:
> Leopard performance: 13714 ps/day
> old OS performance: 41143 ps/day.
> gmx-benchmark : 48000 ps/day.
> 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?
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.
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