From mboxrd@z Thu Jan  1 00:00:00 1970
From: Alexandru Dragoi <alex@zoomnet.ro>
Date: Mon, 06 Nov 2006 10:21:12 +0000
Subject: Re: [LARTC] Dual CPU performance in routing
Message-Id: <454F0C98.10003@zoomnet.ro>
List-Id: <lartc.vger.kernel.org>
References: <183728573.20061106105325@mtm-info.pl>
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To: lartc@vger.kernel.org

GolemMTM wrote:
> Hello
>
> I have question, currently using linux box as router. It only route packets.
> Currently there is 80k packets/sec and this cause 90% CPU usage on
> Intel Celeron 3ghz CPU.
> Did multiprocessor system like 2x XEON DP 3.4ghz will divide CPU
> usage between 2 CPU and will allow double routing performance ?
>
>
>   
It will improve performance if irqs are balanced, but not double. Also, 
90% seems like a lot. If you use firewalling (many linear rules) and qos 
(many linear u32 filter rules), they will cost a lot of performance, you 
will se that with top, on soft interrupts (si). I suggest you to use 
intel gigabit cards on pci64.
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