[Wien] Which time is relevant in the benchmark list ?

[raphael godoffe]

Thank you very much for your quick answer !
This gonna be helpful for the benchmark.


>From: Peter Blaha <pblaha at theochem.tuwien.ac.at>
>Reply-To: A Mailing list for WIEN2k users <wien at zeus.theochem.tuwien.ac.at>
>To: A Mailing list for WIEN2k users <wien at zeus.theochem.tuwien.ac.at>
>Subject: Re: [Wien] Which time is relevant in the benchmark list ?
>Date: Tue, 8 Aug 2006 08:34:23 +0200 (CEST)
>
>"Previously", there was little difference between "cpu" and "wall"-times
>(with the wall time a bit longer due to system overheads), but with the
>modern dual core cpus, the "cpu-time is no longer so much relevant, but
>the walltime is what really counts.
>
>So in essence:
>The timing on single cpus is the cpu-time (but the wall clock should not
>be larger than 1 sec on well installed and empty systems);
>on parallel machines it is the wall-time.
>
>PS: In any case, if the timing routines are ok, the result of the unix
>"time" command and the timing in output1 should be quite similar).
>
>  ( > > Hello,
> >
> > I am testing Wien2k benchmark on different platforms, and I would like 
>to
> > know which time is given
> > in the following list : http://www.wien2k.at/reg_user/benchmark/
> > That is to say :  Is it "real time" given by the UNIX command time, or a
> > time indicated at the end of the output file ?
> > If it is a time of the output file, which one ? "Total CPU time" ? 
>"Maximum
> > CPU time" ? "Sum of Wallclock Time" ?
> >
> > This information is important for me to compare with accuracy different 
>cpu
> > systems,
> > Thank you for your help.
> >
> > Raphaël.
> >
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>
>                                       P.Blaha
>--------------------------------------------------------------------------
>Peter BLAHA, Inst.f. Materials Chemistry, TU Vienna, A-1060 Vienna
>Phone: +43-1-58801-15671             FAX: +43-1-58801-15698
>Email: blaha at theochem.tuwien.ac.at    WWW: 
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