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Date: Fri, 22 Mar 2013 14:23:56 +0100 (CET)
From: Mikael Abrahamsson <swmike@swm.pp.se>
To: grenville armitage <garmitage@swin.edu.au>
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Cc: "tsvwg@ietf.org" <tsvwg@ietf.org>, aqm@ietf.org,
	bloat <bloat@lists.bufferbloat.net>
Subject: Re: [Bloat] [aqm] [tsvwg] how much of a problem is buffer bloat
 today?
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On Fri, 22 Mar 2013, grenville armitage wrote:

>
>
> On 03/22/2013 15:27, Mikael Abrahamsson wrote:
> 	[..]
>> I am not aware of any such work going on, so I'd like to know if
>> anyone else is aware of work in this area?
>
> Of possible relevance, recent FreeBSDs have SIFTR -- a kernel resident
> module for collecting TCP state-machine stats (like cwnd, rtt estimator,
> etc) as packets arrive and depart.
>
> http://www.freebsd.org/cgi/man.cgi?query=siftr

This seems exactly like what I'm after.

On another note, is there software that can get mirrored traffic from 
another host and do TCP analysis of flows when it comes to buffer bloat, 
packet loss etc. If there was, I am in the position of running this 
against a large number of customers over time and can present the results.

-- 
Mikael Abrahamsson    email: swmike@swm.pp.se