Re: parallel execution speedup

From: Joshua Adelman (jadelman_at_berkeley.edu)
Date: Thu Aug 21 2008 - 16:26:06 CDT

Hi Roman,

The speedup you get really depends on the interconnect for your
system, as well as the number of atoms in your simulation. So a
factor of 3 might be what's expected given these factors, but there is
no way of knowing without more info.

Josh

On Aug 21, 2008, at 1:51 PM, Roman Petrenko wrote:

> Dear all,
> when i run a job on one cpu i have this speed
> Info: Initial time: 1 CPUs 0.196443 s/step 1.13682 days/ns 17304 kB
> memory
>
> but when i run it on 6 computers with ppn=4, i get this speed
> Info: Benchmark time: 24 CPUs 0.0710909 s/step 0.411406 days/ns 8328
> kB memory
>
> the question is: do i have mere 3 times speedup using 24 CPUs???
>
> --
> Roman Petrenko.
> Physics Department
> University of Cincinnati
>

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