I have been running one tf2 server through wine for the last 3 hours, and so
far tickrate has never gone below 60 even on pl_goldrush and
pl_frontier_final at 32 players.
Metamod, Sourcemod, Stripper, TF2Items, SDK Hooks and CBaseServer
plugins/extensions seem to be working fine.
Both top and rcon stats report srcds.exe using up to 120% CPU
The only problem so far, apart from the awkwardness of running the windows
version of a program that has a native linux implementation, is that
srcds.exe is using 3.2 GB of swap. I still have to investigate this, also
because I have a total 2 GB of swap :)


On Tue, Mar 15, 2011 at 2:48 PM, Claudio Beretta
<[email protected]>wrote:

> TL;DR version: are there magic command line parameters or convars that
> enable multithreading for srcds games on linux? Or anything that might
> prevent the gameserver from using more than one core?
>
> Long version:
> I recently changed OS from Windows 2008 64 bit to Centos 5.5 64 bit
> because I needed iptables to filter all the incoming attacks so
> popular in these days.
> The hardware remained the same: Xeon w3520 (server version of i7 920),
> 12 GB RAM, 2x80 GB Intel x25-M SSD.
> The problem I'm encountering is that when any 32 slots server gets
> full, the server fps (measured from rcon stats and net_graph 4) drop
> below acceptable levels. They may even reach 20-30 fps, and much less
> when there are bots playing. This obviously affects the tickrate, and
> players experience rubber banding and bad hit detection.
> Both top and rcon stats say that the CPU usage never goes over 100% (1
> core).
> On windows rcon stats reported up to 150%, and sysinternals process
> explorer confirmed that the gameserver was using up to 19% of the
> whole system (which means approximately 1.5 cores, since this box has
> 4+4 cores thanks to hyperthreading). On windows, fps were stable, and
> only in a couple of maps the tickrate would drop below 66.
> I've tried several kernels: the stock centos one
> (2.6.18-194.32.1.el5), a couple provided by my host via netboot
> (2.6.34-something, 2.6.34-something HZ1000) and now i'm using a
> realtime kernel (2.6.33.7-rt29). Both 2.6.34 and the realtime kernel
> were the best regarding to fps jitter, but they did't improve at all
> the low fps when the server is full.
> Playing with taskset to set the affinity of the process has no visible
> effects, same thing with nice and chrt. Also tried disabling all
> addons and using a 3 lines server.cfg (sv_log 0; hostname;
> rcon_password) but still no effect worth mentioning.
>
> I've come to the conclusion that srcds on linux can use at most one
> core. I hope I'm wrong, since it would mean I'm stuck at running 32
> slots servers at tickrate 33 despite having good hardware.
> How you guys manage to run 32 slots srcds servers on linux?
> Thanks
> Claudio
>
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