Improving Linux Dedicated Server Performance

[Actium 0]

I'm still having issues figuring out what the ideal linux kernel configuration concerning the arma linux dedicated server's performance is.

What I've found out so far:

A real server configuration (No Forced Preemption + Timer frequency = 100 Hz):

Causes the server to take ages for even loading a map. When you try to connect to the server and have successfully selected a mission you will be stuck at the "Wait for Host"-screen (the one with the progress bar) for more than 5 minutes. During that time the server's cpu load is as low as 0% and memory usage climbs very, very slowly.

Low-latency desktop configuration (Preemptible Kernel + Timer frequency = 1000 Hz):

Server works quite well, but suffers from very serious JIP- and usual lags.

Additionally a server is not supposed to run a kernel that is actually inteded for desktop-use.

This configuration makes IO-operations despite the kernel manual's claims ("slightly lower throughput") about 5 times more cpu intensive when compared with the real server configuration (And we do not want that for servers).

Compromise A (Voluntary Kernel Preemption + Timer Frequency = 100 Hz):

-> Real server configuration (No Forced Preemption + Timer frequency = 100 Hz)

Compromise B (Voluntary Kernel Preemption + Timer Frequency = 1000 Hz):

Seems to be working quite well. However I just started testing this configuration. Additionally 1000 Hz are not supposed to be used for a server system either.

Did anyone else play with different performance related kernel configuration options before?

Question to the developers: What configurations is the server intended for?

[whisper 0]

I just compiled for a preemptive, 1000Hz kernel, and get what I'd expect (ie normal loading times but with the usual lag on JiP and such)

[NightShade 0]

I'd expect 250Hz/1000Hz with No-Preemp or Voluntary Preemp to work best. The main benefit of using forced-preemp is that it makes keyboard/mouse action more responsive on that machine itself, while lowering performance of processes running on the machine. So for a server that would never be useful as it would slow down what is running on it, without any actual benefit.