[Soekris] net4801 bridging firewalls benchmarks results
giovanni.faglioni at gmail.com
Sun Oct 9 10:04:11 UTC 2005
2005/10/9, Chris Cappuccio <chris at nmedia.net>:
> So, what in the world is "maxxed out irq's" ?
My understanding is that "maxxed out irq's means that
the irq processing is the bottleneck.
> Anyways, the OpenBSD driver is very similar to the FreeBSD one, as that's
> where it's derived from.
I'll check if it's possible to recompile an OpenBSD kernel
with DEVICE_POLLING defined for the natsemi chipset.
(And maybe HZ=1000 or 2000).
> Although, I agree I've never seen numbers for FreeBSD on Soekris as high as
> this before. (Then again, most of my memory is probably of net45xx performance
> and not net48xx.) But even with polling, the idea that a net4801 uses only
> 4-8% CPU while pushing nearly full speed is interesting and seems
Maybe we measure it in a wrong way. Our methodology is to
keep a "top" window open on the 4801 box, and look at the
"system" and "user" numbers. They go up (expecially "system")
immediately as the test begins, then drop quickly after a couple
of seconds to 7-8% levels. (user is <2% system is ~6-7%)
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