From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from gpo2.cc.swin.edu.au (gpo2.cc.swin.edu.au [136.186.1.31]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by huchra.bufferbloat.net (Postfix) with ESMTPS id 0AF3521F201 for ; Thu, 21 Mar 2013 23:00:51 -0700 (PDT) Received: from [136.186.229.37] (garmitage.caia.swin.edu.au [136.186.229.37]) by gpo2.cc.swin.edu.au (8.14.3/8.14.3) with ESMTP id r2M60TSX024772 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Fri, 22 Mar 2013 17:00:34 +1100 Message-ID: <514BF37D.2080000@swin.edu.au> Date: Fri, 22 Mar 2013 17:00:29 +1100 From: grenville armitage User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:16.0) Gecko/20121107 Thunderbird/16.0.2 MIME-Version: 1.0 To: Mikael Abrahamsson References: <51408BF4.7090304@cisco.com> <514B5AC8.8000502@net.t-labs.tu-berlin.de> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: bloat , aqm@ietf.org, "tsvwg@ietf.org" Subject: Re: [Bloat] [aqm] [tsvwg] how much of a problem is buffer bloat today? X-BeenThere: bloat@lists.bufferbloat.net X-Mailman-Version: 2.1.13 Precedence: list List-Id: General list for discussing Bufferbloat List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 22 Mar 2013 06:00:52 -0000 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 cheers, gja