Hi everybody,

just to get some feedback, before I go on a wild goose chase:

we're running LEAF Bering-uClibc 4.0.1 as a firewall on a 100 Mbit 
downstream/6 MBit upstream link. It's basically an out of the box setup, 
with only a couple of additional shorewall rules (a couple of ports 
being forwarded to different computers in the DMZ, that's pretty much all).

For the firewall, we're using a box with an Atomâ„¢ D510 Dual Core (1M 
Cache, 1.66 GHz) - the exact model we're using is this:

http://www.nexcom.com/Products/network-and-communication-solutions/desktop-appliance/desktop-appliance/communication-gateway-dna-1110

(cute little box, even though it costs a bit more than an Alix box - but 
having a VGA and keyboard port makes the setup a lot easier).

So, now for my sanity check: we managed to find some sites that could 
actually saturate our link doing downloads, and while doing that, "top" 
showed between 0% and 1% of CPU utilization. To me, that sounds somewhat 
unlikely, unless the the 2.6 kernel is _much_ more efficient at 
routing/firewalling than the 2.4 kernel ever was.

So, before we start hunting for an issue that's not actually there - 
does anybody have any experience running LEAF Bering-uClibc 4.0.1 on a 
relatively high speed link, and has a chance to compare that to Bering 
uClibc 3.x? I _know_ that with 3.x, a download at 3+ megabytes per 
second pretty much max'd out the CPU of my Alix box at home, but trying 
it right now (running Bering uClibc 4.0), I'm getting this from "top":

CPU:  0.1% usr  0.3% sys  0.0% nic 98.8% idle  0.0% io  0.0% irq  0.5% sirq

(while Firefox is telling me it's downloading at 2.9 to 3.1 Megabytes/s).

Is the 2.6 kernel _that_ much more efficient, or is there an issue whith 
what top shows?

I'm puzzled...

Martin

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