Sorry Steve

[donalson]

I just reread the email from Steve carefully looking for enlightenment and
realized that my previous email could have been construed as rude.  This is
proof that if you respond to an email you should read it carefully.  The
reference to a stopwatch was not related to Steves testing (this is what I
missed the first time.)  In fact I don't own one, I was using the clock on the
wall.  I am trying to compare a Swarm model to a C++ model, so I am trying to
make the runs as long (and eventually as complex) as possible and they will
probably be greater than 1 hour.  I think that this is necessary when comparing
Swarm with a different simulation base (where it is not when comparing the same
Swarm on two different machines.)  In C++ there is a library function called
"time" that I can call at the beginning and end and then subtract and printout.
I was hoping that there was something similar in objc.

I did not mean to imply that I had a better testing method or anything of the
like.  I had already planned the email when I logged on and just saw that
someone else was doing something similar so I replied.  I was quite embarrassed
when I just reread.  Sorry Steve.

Cheers,

   Doug

donalson wrote:

> Funny this should come up as I log in to ask a question about timing sims.
>
> I have been trying to find a way in Windows to get the system time (not
> swarm time) at the beginning and end of a run so that I can subtract them to
> get "real" elapsed time.  I want a long run time so that effects of any
> transient responces are minimized and don't want to sit in front of the
> computer for 30+ minutes with a stop watch.  Is there a library system call
> to get the time from the computer?
>
> Cheers,
>
>    Doug
>
> "M. Lang / S. Railsback" wrote:
>
> > Glen says I should post this:
> >
> > We just implemented a batch mode on our salmon out-migrant simulator
> > (demo'd at SwarmFest; or see http://weasel.cnrs.humboldt.edu/~simsys/).
> > I have both Linux (Redhat 5.1; XWindows) and Windows NT on my computer,
> > so here is a comparison.
> >
> > The model has two graphics windows: the animation raster and a
> > histogram. The fish-agents do a fair, but not huge, amount of
> > computation each time step, mainly looking around for the nearest
> > hydraulic-node object that tells them their velocity, and then moving to
> > a new location. The space is big: 4,000 X 3,000; I ran 500 fish down it.
> >
> > Simulations were all done on the same machine, Pentium II, 450 mHz with
> > 128k of RAM. Hard disk use during the run appeared negligible. Run time
> > measurements were made by eyeball and stop watch.
> >
> > Windows NT batch mode:  1 min 40 s.
> > Linux batch mode:       1:40 (no difference expected from windows)
> > Windows with graphics:  13:20
> > Linux with graphics:    9:50
> >
> > So- in Windows batch mode runs 8 times faster; 6 times faster in Linux.
> > Windows takes 33% longer for graphics mode than Linux.
> >
> > Steve R.
> > --
> > address@hidden
> > Lang, Railsback & Assoc.
> > 250 California Ave., Arcata CA 95521
> > 707-822-0453; Fax 822-1868
> >
> >                   ==================================
> >    Swarm-Support is for discussion of the technical details of the day
> >    to day usage of Swarm.  For list administration needs (esp.
> >    [un]subscribing), please send a message to <address@hidden>
> >    with "help" in the body of the message.
>
> --
> *********************************************************************
> * Doug Donalson                 Office: (805) 893-2962
> * Ecology, Evolution,           Home:   (805) 961-4447
> * and Marine Biology            email address@hidden
> * UC Santa Barbara
> * Santa Barbara Ca. 93106
> *********************************************************************
> *
> *   The most exciting phrase to hear in science, the one that
> *   heralds new discoveries, is not "EUREKA" (I have found it) but
> *   "That's funny ...?"
> *
> *       Isaac Asimov
> *
> *********************************************************************
>
>                   ==================================
>    Swarm-Support is for discussion of the technical details of the day
>    to day usage of Swarm.  For list administration needs (esp.
>    [un]subscribing), please send a message to <address@hidden>
>    with "help" in the body of the message.

--
*********************************************************************
* Doug Donalson                 Office: (805) 893-2962
* Ecology, Evolution,           Home:   (805) 961-4447
* and Marine Biology            email address@hidden
* UC Santa Barbara
* Santa Barbara Ca. 93106
*********************************************************************
*
*   The most exciting phrase to hear in science, the one that
*   heralds new discoveries, is not "EUREKA" (I have found it) but
*   "That's funny ...?"
*
*       Isaac Asimov
*
*********************************************************************



                  ==================================
   Swarm-Support is for discussion of the technical details of the day
   to day usage of Swarm.  For list administration needs (esp.
   [un]subscribing), please send a message to <address@hidden>
   with "help" in the body of the message.