netdev - RE: Netconf2011 slides...

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Message-ID: <D3F292ADF945FB49B35E96C94C2061B911E6EF96@nsmail.netscout.com>
Date:	Fri, 17 Jun 2011 14:09:47 -0400
From:	"Loke, Chetan" <Chetan.Loke@...scout.com>
To:	"Changli Gao" <xiaosuo@...il.com>,
	"Srinivasa T N" <seenutn@...ux.vnet.ibm.com>
Cc:	"David Miller" <davem@...emloft.net>, <netdev@...r.kernel.org>
Subject: RE: Netconf2011 slides...

> -----Original Message-----
> From: netdev-owner@...r.kernel.org [mailto:netdev-
> owner@...r.kernel.org] On Behalf Of Changli Gao
> Sent: June 17, 2011 9:22 AM
> To: Srinivasa T N
> Cc: David Miller; netdev@...r.kernel.org
> Subject: Re: Netconf2011 slides...
> 
> On Thu, Jun 16, 2011 at 6:09 PM, Srinivasa T N
> <seenutn@...ux.vnet.ibm.com> wrote:
> >        Were there some interesting topics which is useful for the
> community?
> > (Few lines on each such topic would do).
> >
> 
> netmap was mentioned by Tom. It is interesting for me.
> 
> http://info.iet.unipi.it/~luigi/netmap/

http://lists.openwall.net/netdev/2011/06/08/7

Just curious is there anything that we can do to enhance TPACKET_V3 (ignore the memcpy)?
Not selling it because I have proposed the patch but anyone who is serious
about online/offline packet mining for multiple ports would have hard time scaling with
tpacket_v1[2] to begin with.

At the very least, one needs block abstraction + timeout mechanism. Simple.
One just can't retire data - packet-by-packet. We have boxes capable
of mining ~40G with similar approach.

Now we can also think about rolling it into a separate driver but then that's
something that is open for discussion.

Benefits of a driver are as follows:
1) Folks can customize block/packet headers according to their needs without having to recompile the kernel.
2) No core network bloat.
3) Smaller NPU/FPGA shops can churn out a new driver patchset relatively quickly.

> 
> --
> Regards,
> Changli Gao(xiaosuo@...il.com)

Regards
Chetan Loke

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