[gmx-users] Apples-to-Apples comparison for dpcc benchmark
nmoore at physics.umn.edu
Thu Jun 16 00:40:30 CEST 2005
> On Wed, 2005-06-15 at 13:53 -0500, Nathan Moore wrote:
>> I want to make sure that I understand the meaning of the GROMACS
>> When I look at the logfile from a 32processor dpcc run, I see the
>> following text near the end of the file:
>> M E G A - F L O P S A C C O U N T I N G
>> NODE (s) Real (s) (%)
>> Time: 1464.000 1464.000 100.0
>> (Mnbf/s) (GFlops) (ps/NODE hour) (NODE hour/ns)
>> Performance: 79.584 2.878 24.590 40.667
>> Do I understand correctly that the number to compare is total ps/day,
>> 24.590 ps/Node-hour * 24 hours/day * 32 processors = 18,888 ps/day ?
> No I'm sorry...
> 24.59 * 24 = 600 ps/day.
> which is roughly the same as 4 Xeons at 4 times the clock.
>> Additionally, the published parallel dpcc benchmarks use single
>> and grompp options -sort and -shuffle, 5000 timesteps? Are there any
>> other optimization options I should be aware of when making a
> This is all.
ok, thanks, ps/day = (ps/node-hour)*24
this means that quoted ps/day is really ps/node-day?
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