Periodic choke on ubuntu server

[Skooma]

I'm having an odd problem. On my server (regardless of the number of people on it), I will get a periodic choke "hickup" where it will spike then return to 0. I've noticed that my FPS will drop to the 10s - 40s then return to normal every few seconds (about 5.)

My server stats are:

Running Hidden Source B4B mod
Mani running under MetaMod

Athlon XP 2800+
1gig DDR RAM
Ubuntu 7.10

tickrate 66
fps_max 600
Server.cfg settings (checked this many times) correct for my setup

Since it's periodic, I thought perhaps another process is causing this. However, increasing the priority of srcds_run below 0 does not seem to help. Anyone have an idea? Thanks!

[Skooma]

Oh, my server ran flawlessly under Windows XP. I switched to Ubuntu due to Hidden Source having stability issues on Windows.

[Drocona]

The CPU is rather slow, I have choke on some older systems too at round starts etc.

[Skooma]

Drocona Wrote:The CPU is rather slow, I have choke on some older systems too at round starts etc.

The odd thing is though, if I run under Windows I have very little to no choke even with a full server load.