From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from masada.superduper.net (masada.superduper.net [85.119.82.91]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (Client did not present a certificate) by huchra.bufferbloat.net (Postfix) with ESMTPS id 632BC201B52; Wed, 9 May 2012 13:03:26 -0700 (PDT) Received: from snappy-wlan.parc.xerox.com ([13.1.108.21]) by masada.superduper.net with esmtpsa (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.72) (envelope-from ) id 1SSD5X-0007hb-Kl; Wed, 09 May 2012 21:02:20 +0100 Message-ID: <4FAACD48.9040100@superduper.net> Date: Wed, 09 May 2012 13:02:16 -0700 From: Simon Barber User-Agent: Mozilla/5.0 (X11; Linux i686; rv:12.0) Gecko/20120430 Thunderbird/12.0.1 MIME-Version: 1.0 To: =?ISO-8859-1?Q?Roger_J=F8rgensen?= References: <4FA9FDC0.9010600@superduper.net> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Score: -2.9 (--) Cc: codel@lists.bufferbloat.net, bloat Subject: Re: [Codel] [Bloat] The challenge 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 20:03:27 -0000 significant queues only form where there is a bottleneck, so there should not be long cascades of codel actually dropping. Simon On 05/09/2012 12:10 PM, Roger Jørgensen wrote: > On Wed, May 9, 2012 at 7:16 AM, Simon Barber wrote: >> One question now remains - will codel AQM be sufficient on it's own in >> getting delays down to levels that users are happy with for the common >> latency sensitive interactive traffic - VoIP, gaming and Skype for example - >> or are the further reductions that can be had with traffic classification >> and smart queuing algorithms necessary? The nicest part about codel on it's >> own is that it works on opaque packets - it will handle VPNs and traffic >> within them nicely. It gets away from all the complexity required to >> classify traffic in a world where traffic is often trying to hide. > > I'm more worried about how long cascades of codel code in equipment > will work together, add lots of traffic to the mix, just how will it > behave then? > > >