[Opensim-users] Prims and CPU usage?

[Frisby, Adam]

This is probably related to how the Update routine handles sending updates to clients.

Adam

> -----Original Message-----
> From: opensim-users-bounces at lists.berlios.de [mailto:opensim-users-
> bounces at lists.berlios.de] On Behalf Of John Sheridan
> Sent: Saturday, 16 May 2009 6:22 AM
> To: opensim-users at lists.berlios.de
> Subject: [Opensim-users] Prims and CPU usage?
> 
> Gang,
>     After trying a few of the higher prim oar files I've seen fly
> through here I've begun to notice a rather curious trend, although I'm
> unsure if its to do with my configuration or if others have seen this
> as
> well.  After trying Nebadon's Art City oar on a local standalone (Mono
> 2.0.1 / SQLite, Basic Physics on Linux Ubuntu) I found that after
> everything loaded and committed to the database (which on its own took
> a
> good hour and a half probably due to SQLite) upon restarting OpenSim
> cpu
> use for the OpenSim process was pinned at 30% when idle.
> 
>   Oddly enough, since I started building my Ravenport sims (Mono 2.0.1
> /
> MySql, ODE / ZeroMesh on Ubuntu) I've as well noticed a steady increase
> in cpu use as the build progressed, however until now I thought this
> was
> due to scripts or possibly a few rogue physical prims that may have
> sunk
> under ground or flown off the sim edge.  Currently when idle the
> Ravenport server is using 25% of the cpu at ~13,000 prims where a month
> ago it bordered around 10 to 15% at roughly 7,000 prims.  Out of
> curiosity I saved the sims out to an oar and began dissecting them on
> the same local configuration I tested the Art City  oar on.
> Surprisingly after removing all scripted objects there was no change in
> cpu use - it was still at 25%.  It wasn't until I began deleting the
> buildings that I began to notice a change where as the sims emptied out
> the cpu use decreased down to between 1 and 2% once all prims were
> deleted.
> 
>   To verify, I decided to try again this time with a clean OpenSim
> instance of the same config where I had set a scripted prim to create a
> grid of default .5x.5x.5 cubes.  The first round was with a grid of
> 13,000 prims which upon persisting and rebooting pinned the cpu at 30%,
> the second test I added another 13,000 which brought it up to 40%.
> After adding another 13,000 (39,000 total) the cpu was pinned at a
> solid
> 100% after a fresh restart.
> 
>   I have to admit, I do find this to be quite baffling.  In all I'd
> expect the sim to use more memory with a higher prim count but the cpu
> should remain about the same, especially given that my test environment
> was using basic physics where all prims were rendered as phantom.
> 
>   The oar for the 39,000 prim sim is located at
> http://www.pseudospace.net/primzilla.oar if anyone else would like to
> test it on their own configuration.
> 
> Thanks, :)
> 
>  - John / Orion Pseudo
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