Hadas Leonov wrote:
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.
Did you try the beta version I put on the ftp site?
Hadas.
Carsten
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________________________________________________________________________
David van der Spoel, PhD, Assoc. Prof., Molecular Biophysics group,
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