Re: Packet capture performance comparison of

[Fabian Schneider <schneifa () net in tum de>]

Hi,

> I've read Fabian Schneider's thesis "Performance evaluation of packet
> capturing systems for high-speed networks", which compares capture
> performance under variable testing and generally finds that dual-core
> Opterons perform somewhat better under heavy capture load than dual-core
> Xeons. But now that quad-core Xeons are available, I'm curious whether
> anyone has measured capture improvement using four cores. 

Unfortunately we haven't got such a system by now. But we are trying to 
get one soon. But i do not expect to much improvement regarding the 
difference between dual- and quad-core because i think the main bottleneck 
is the memory accessibility. Nevertheless i think it is necessary by now 
to examine the performance of the new Intel Core processor architecture, 
which could yield major improvments. 

> I should expect four cores to do better, but I'd be interested in any 
> empirical results to that effect. I'm wondering, for example, how close 
> a box with a couple of dual-port PCIe Gb NICs (Endace or nPulse) and 
> dual quad-core processors could come to 4Gb/s aggregate capture speed, 
> while writing some packets to disk. Has anyone out there put together 
> such a box and come up with some performance statistics?

We are hopefully going to do this soon, but i cannot promise a date.

   best
   Fabian

-- 
Fabian Schneider (Dipl. Inf.), An-Institut Deutsche Telekom Laboratories
Technische Universitaet Berlin, Fakultaet IV -- E-Technik und Informatik
address: Sekr. TEL 4, Ernst-Reuter-Platz 7, 10587 Berlin
e-mail: fabian () net in tum de, WWW: http://www.net.in.tum.de/~schneifa
phone: +49 30 8353 - 58513, mobile: +49 179 242 76 71

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