From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-04-ewr.dyndns.com (mxout-034-ewr.mailhop.org [216.146.33.34]) by lists.bufferbloat.net (Postfix) with ESMTP id 07C0C2E034E for ; Sat, 9 Apr 2011 17:24:11 -0700 (PDT) Received: from scan-01-ewr.mailhop.org (scanner [10.0.141.223]) by mail-04-ewr.dyndns.com (Postfix) with ESMTP id 154CF7EB508 for ; Sat, 9 Apr 2011 14:58:16 +0000 (UTC) X-Spam-Score: 0.0 () X-Mail-Handler: MailHop by DynDNS X-Originating-IP: 130.207.160.71 Received: from deliverator6.gatech.edu (deliverator6.gatech.edu [130.207.160.71]) by mail-04-ewr.dyndns.com (Postfix) with ESMTP id 0A1937EB4DB for ; Sat, 9 Apr 2011 14:58:09 +0000 (UTC) Received: from deliverator6.gatech.edu (localhost [127.0.0.1]) by localhost (Postfix) with SMTP id 621C020C14B; Sat, 9 Apr 2011 10:58:08 -0400 (EDT) Received: from mail3.gatech.edu (mail3.gatech.edu [130.207.185.163]) by deliverator6.gatech.edu (Postfix) with ESMTP id C75B920C146; Sat, 9 Apr 2011 10:58:07 -0400 (EDT) Received: from [192.168.1.1] (adsl-66-161-18.asm.bellsouth.net [98.66.161.18]) (Authenticated sender: kd108) by mail3.gatech.edu (Postfix) with ESMTPSA id A2B2D149275; Sat, 9 Apr 2011 10:58:07 -0400 (EDT) Message-ID: <4DA073FF.1060203@cc.gatech.edu> Date: Sat, 09 Apr 2011 10:58:07 -0400 From: Constantine Dovrolis User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.2.15) Gecko/20110303 Thunderbird/3.1.9 MIME-Version: 1.0 To: bloat@lists.bufferbloat.net Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: Partha Kanuparthy , Marina K Thottan , "Ravi Prasad \(ravipra\)" Subject: [Bloat] two related research papers 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: Sun, 10 Apr 2011 00:24:12 -0000 hi all, I am new at Bufferbloat and my apologies if I bring up things that have been already discussed. We have written two research papers that I think are very relevant to Bufferbloat: 1. Router Buffer Sizing for TCP Traffic and the Role of the Output/Input Capacity Ratio, http://www.cc.gatech.edu/fac/Constantinos.Dovrolis/Papers/buffers-ton.pdf (with Ravi Prasad and Marina Thottan) 2. End-to-end Detection of ISP Traffic Shaping using Active and Passive Methods http://www.cc.gatech.edu/fac/Constantinos.Dovrolis/Papers/shaperprobe-oct10.pdf (with Partha Kanuparthy) The first paper revisits some old ("you need bandwidth-delay product worth of buffering") and more recent ("you only need very short buffers") buffer sizing rules. It brings up the importance of the "output/input capacity ratio", which is the ratio between the capacity of the link that we focus on and the max rate of the arriving traffic in that link. The second paper describes our tool "ShaperProbe" (available on M-Lab) and it describes measurements from many thousands of users at various ISPs. It gives an idea about the extent of traffic shaping out there, and the shaping rate & max-burst-size parameters that ISPs typically use. We will be glad to participate more actively in BufferBloat, if you think we can help somehow. -- Constantine -------------------------------------------------------------- Constantine Dovrolis, Associate Professor College of Computing, Georgia Institute of Technology 3346 KACB, 404-385-4205, dovrolis@cc.gatech.edu http://www.cc.gatech.edu/~dovrolis/