From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mho-02-ewr.mailhop.org (mho-02-ewr.mailhop.org [204.13.248.72]) (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 D0E1C201AF7 for ; Wed, 9 May 2012 13:42:45 -0700 (PDT) Received: from c-24-4-217-203.hsd1.ca.comcast.net ([24.4.217.203] helo=kmn.local) by mho-02-ewr.mailhop.org with esmtpsa (TLSv1:CAMELLIA256-SHA:256) (Exim 4.72) (envelope-from ) id 1SSDie-000PjH-Hp; Wed, 09 May 2012 20:42:44 +0000 X-Mail-Handler: MailHop Outbound by DynDNS X-Originating-IP: 24.4.217.203 X-Report-Abuse-To: abuse@dyndns.com (see http://www.dyndns.com/services/mailhop/outbound_abuse.html for abuse reporting information) X-MHO-User: U2FsdGVkX19zlwWqV5WMMqbTvTxqXKxZakP5MEImu5g= Message-ID: <4FAAD6C2.5070304@pollere.com> Date: Wed, 09 May 2012 13:42:42 -0700 From: Kathleen Nichols User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.7; rv:12.0) Gecko/20120428 Thunderbird/12.0.1 MIME-Version: 1.0 To: codel@lists.bufferbloat.net References: <4FAAD534.2030100@superduper.net> In-Reply-To: <4FAAD534.2030100@superduper.net> X-Enigmail-Version: 1.4.1 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Subject: Re: [Codel] Worst case conditions - large RTT X-BeenThere: codel@lists.bufferbloat.net X-Mailman-Version: 2.1.13 Precedence: list List-Id: CoDel AQM discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 09 May 2012 20:42:46 -0000 In the paper, I show the 500 RTT case. I also ran some at 750ms and 1 sec. The utilization is not as good as the smaller RTTs but it was still good. Maybe you can try to create the situation you are thinking of? On 5/9/12 1:36 PM, Simon Barber wrote: > Codel assesses the minimum delay over a fixed time period (the interval) > - what happens when the interval is much smaller that the RTT. For > example a tcp stream is experiencing a 2 second RTT (perhaps due to > bufferbloat at some point), yet the interval is 100ms. The TCP > implementation is a poor one that will ACK a window at a time. Here > codel will drop excessively, and cause low throughput? > > Simon > _______________________________________________ > Codel mailing list > Codel@lists.bufferbloat.net > https://lists.bufferbloat.net/listinfo/codel