netdev - Re: IPv6 tunnel scalability problem

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Message-Id: <200809011809.26410.rdenis@simphalempin.com>
Date:	Mon, 1 Sep 2008 18:09:26 +0300
From:	Rémi Denis-Courmont <rdenis@...phalempin.com>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	netdev@...r.kernel.org, Bernhard Schmidt <berni+ipv6@...kenwald.de>
Subject: Re: IPv6 tunnel scalability problem

Le lundi 1 septembre 2008 15:04:58 Andi Kleen, vous avez écrit :
> Rémi Denis-Courmont <rdenis@...phalempin.com> writes:
> > I have been maintaining a TUN-based Linux implementation of
> > Teredo/RFC4380. On a busy node, this can trigger quite many peers on the
> > virtual point-to-point tunnel interface. I have received complaints that
> > the whole thing seems to hit some severe performance bottleneck when this
> > happens. It is not clear to me at this point whether it's a kernel or a
> > user problem. So I have been writing a stress test.
>
> You could use oprofile to find out where the CPU time is going.
> That would work even during normal operation. Post the opreport -l output

Understood. But this far, the kernel crashes during my stress test...

-- 
Rémi Denis-Courmont
http://www.remlab.net/
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