Re: loaded router, excessive getnstimeofday in oprofile

Evgeniy Polyakov
2008-08-26T20:14:50Z

On Fri, Aug 22, 2008 at 04:57:40AM +0300, Denys Fedoryshchenko (denys@visp.net.lb) wrote:
> I have loaded router (~650 Mbps In+Out), based on 2xAMD Opteron 248, Sun Fire
> X4100. HPET timer available (TSC seems not available on this platform).
> Network interfaces is onboard, connected over PCI-X.
>
> Right now i am using only one processor, cause using only one interface and
> interrupts stick to it. Other is almost not used.
> At peak time i notice in mpstat, that this processor is almost "dead", and if
> i run minor application consuming resources - ping over this router will be
> terrible. For me it is clear - system overloaded. I did oprofile, and here is
> result (at low load time, but at peak time it is very similar).

Do you have any packet sockets in this system? Like running dhcp daemon?

--
Evgeniy Polyakov