Subject: Re: _High_ CPU usage while routing (mostly) small UDP packets

From: Karsten Desler <[email-masked]>
Date: Tue, 7 Dec 2004 05:02:35 +0100

* jamal wrote:
> Beats me. Make sure it boots NAPI. Also if you can turn off ITR; intel
> loves to turn on that silly feature.

ITR was in fact activated. I think i've disabled it now
(e1000.InterruptThrottleRate=0 in the kernel cmdline).
And as I'm reading the e1000 code, there is no way to enable/disable
NAPI without a recompile. So the fact that ethtool spat out -NAPI in
the version string means that NAPI is actually used.

- Karsten