netdev - RE: Scaling problem with a lot of AF_PACKET sockets on different interfaces

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Message-ID: <1370615420.24311.425.camel@edumazet-glaptop>
Date:	Fri, 07 Jun 2013 07:30:20 -0700
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	David Laight <David.Laight@...LAB.COM>
Cc:	Mike Galbraith <bitbucket@...ine.de>,
	"Vitaly V. Bursov" <vitalyb@...enet.dn.ua>,
	linux-kernel@...r.kernel.org, netdev <netdev@...r.kernel.org>
Subject: RE: Scaling problem with a lot of AF_PACKET sockets on different
 interfaces

On Fri, 2013-06-07 at 15:09 +0100, David Laight wrote:
> > > Looks like the ptype_base[] should be per 'dev'?
> > > Or just put entries where ptype->dev != null_or_dev on a per-interface
> > > list and do two searches?
> > 
> > Yes, but then we would have two searches instead of one in fast path.
> 
> Usually it would be empty - so the search would be very quick!

quick + quick + quick + quick + quick == not so quick ;)

Plus adding another code for /proc/net/packet

Plus adding the xmit side (AF_PACKET captures receive and xmit)



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