[Bridge] Lowering CPU utilisation

Stephen Hemminger shemminger at linux-foundation.org
Wed Oct 31 15:08:19 PDT 2007

On Thu, 1 Nov 2007 09:00:07 +1100
"Leigh Sharpe" <lsharpe at pacificwireless.com.au> wrote:

> Hi All, 
>  I have a box with 12 bridges on it, each of which has 2 ports.
> When the traffic level on the box reaches around 15-20Mbps on each
> bridge, my CPU utilisation gets to about 90-95%.
> I would like to avoid working the CPU that hard. Is there anything which
> can be done to get the CPU utlilisation down a bit? I have plans for an
> even bigger bridge, but these results indicate that it may not scale
> quite that well.
> Regards,
>              Leigh

Learn how to use oprofile and figure out where the time is going.
You might be getting hit by the choice of network interface.

Stephen Hemminger <shemminger at linux-foundation.org>

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