[ut3] UT3 Linux empty but taking 20% cpu ?

[Ryan C. Gordon]

> Everything looks to be working fine, I can join the server, but the cpu
> usage is "high" when the server is empty:
> 
> 20-25% on a AMD x2 3800, 1gb ram.	Old Fedora Core 4 Final
> 2-4% on a XEON E5410 8gb ram	Centos 5 Final
> 2-5% on a dual amd 265 4gb RAM   Centos 5 Final

It's definitely idle here when empty...is there a specific map doing this?

In ut2003, we had a bug where the weather effects were needlessly 
running on the server, so you would eat a ton of CPU to calculate 
raindrops you'd never see...we fixed it once we knew about it. I'm sure 
there are issues like this in UT3 to be sorted out, too.

Also, there's a setting in the .ini to reduce server tickrate when no 
one is playing, which should reduce CPU usage for idle servers. That's 
"IdleServerTickRate" in UTEngine.ini's "[IpDrv.TcpNetDriver]" section.

--ryan.