[Opensim-dev] forcing some load, kicking the tires

[Sean Dague]

On Fri, Nov 09, 2007 at 08:44:05AM -0800, Bowman, Mic wrote:
> 
> in order to test some aggregate networking issues, we have a standalone
> server (current trunk version from svn, no physics, xp, core duo, 4G,
> ...) where we are moving a bunch of objects around inside a fixed
> region. each object is running a script with a timer event that fires
> every 1-3 seconds and the object moves to a random position using
> llsetpos (so there are no collisions). this set up gives us the ability
> to generate scalable and almost reproducible loads (at least for object
> updates).
> 
> with 30 objects in motion, the server runs < 30% load, cyclical (athough
> the peak loads occur at about 15 second intervals so i'm not sure how
> that correlates to timer events). with 100 objects in motion the server
> load peaks at around 75% (memory image is around 800M consistently).
> however, with 100 objects in motion, the bandwidth to the one user
> currently connected goes to (almost) 0, with periodic (every 10 seconds
> or so) big bursts of updates. 

I would suggest enabling ODE.  I think that the days of basic physics
being interesting are coming to an end now that we've got a physics
engine that works reasonably well.

It would also be interesting to see what the difference in load was
between it an basic physics.  I'm assuming 10x, but a real number there
would be good to have.

       -Sean

-- 
__________________________________________________________________

Sean Dague                                       Mid-Hudson Valley
sean at dague dot net                            Linux Users Group
http://dague.net                                 http://mhvlug.org

There is no silver bullet.  Plus, werewolves make better neighbors
than zombies, and they tend to keep the vampire population down.
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