2006/9/14, Mark Abraham <[EMAIL PROTECTED]>:
It is forbidden to run only one cpu on the cluster A in my inisititute.
For all the jobs (except the one on my local computer) , I set walltime=1hour, and nsteps= 200,000,dt=0.001.
The running time are taken from the end of the .log file. See the following example.
NODE (s) Real (s) (%)
Time: 1581.000 1581.000 100.0
26:21
(Mnbf/s) (GFlops) (ns/day) (hour/ns)
Performance: 56.376 4.515 10.930 2.196
Probably your interconnects between nodes are using carrier pigeons or
something :-) I expect that 1 cpu on machine A will require around four
times as long as 1 4-cpu node, which you can presumably test for yourself.
It is forbidden to run only one cpu on the cluster A in my inisititute.
For next time, if you want to compare hardware like this, either use the
same length of time or the same number of MD steps for all of your runs.
Also when reporting runtimes, make it clear whether you are reporting
walltime or some time * number_of_cpus, etc. :-)
For all the jobs (except the one on my local computer) , I set walltime=1hour, and nsteps= 200,000,dt=0.001.
The running time are taken from the end of the .log file. See the following example.
NODE (s) Real (s) (%)
Time: 1581.000 1581.000 100.0
26:21
(Mnbf/s) (GFlops) (ns/day) (hour/ns)
Performance: 56.376 4.515 10.930 2.196
Mark
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Sincerely yours,
**********************************************
Baofu Qiao, PhD
Frankfurt Institute for Advanced Studies
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