[Coin-symphony] Symphony solution statistics

[Ted Ralphs]

Eligijus,

Thanks for the question. I have now revamped the statistics reported to 
be more meaningful and self-explanatory (hopefully). The statistics 
having to do with idle time are only meaningful in parallel and are used 
to measure parallel efficiency. They are now suppressed in the 
sequential version. Real Time is the wallclock time the process took to 
execute. That is now reported as "Wallclock Time". The "User Time" is 
the time reported by the OS as having been used by the process. On a 
machine that has nothing else running on it, Wallclock Time and User 
Time should be about the same. Any difference is due to other processes 
that were running at the same time as SYMPHONY. In parallel, User Time 
is the total time used by all parallel processes and so should be much 
larger than wallclock time. Let me know if you have any other questions.

Cheers,

Ted

Eligijus Kubilinskas wrote:
> Dear all,
> 
> I wonder what do the entries (e.g., Idle Time, Total User Time, Total 
> Real Time) in the Symphony output (Timing/Statistics) mean? Is there a 
> complete description of those somewhere?
> Thank you in advance for the answers.
> 
> Best wishes,
> Eligijus
> 
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-- 
Dr. Ted Ralphs
Assistant Professor
Industrial and Systems Engineering
Lehigh University
(610)758-4784
tkralphs at lehigh.edu
www.lehigh.edu/~tkr2