From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-ie0-x22e.google.com (mail-ie0-x22e.google.com [IPv6:2607:f8b0:4001:c03::22e]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority" (verified OK)) by huchra.bufferbloat.net (Postfix) with ESMTPS id 279E2200619 for ; Wed, 10 Jul 2013 13:41:00 -0700 (PDT) Received: by mail-ie0-f174.google.com with SMTP id 9so16248214iec.19 for ; Wed, 10 Jul 2013 13:40:59 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type:content-transfer-encoding; bh=alkdBWTm1toGAH8Pq9AVFxL/Zvn9PvwE+BCgnSIg4vo=; b=Jpv86VrIwNWMO2dD+cbM1332+bYM83v+4uOkcKhX1/beLt0CNk0NCLacE746LLSTAX on8gOg2WV76omg6M29hbBi71/TfRz2Oj4woZTukiY9OOkUr6AMI1mFBMG8+NRy6cN041 qpAsX/TIhfLkXdhvdwgInIfRF2vzxLzWxznw0gacszyeMK2HbtFnWe55mKsAKdxdenw0 MnoweMolbyIAPr7ipgL8T/n0sFlxeHGrWTXX1sKeHrlMt/jJQxsAWoiz0VEB66qUWXks xtQvFkPDaExFO5mpIUDmp7n5uxEaSnYx5tLQz17e9BUSr3jmJH44ZWkZ+Jwstnf6Uw8J QK9Q== MIME-Version: 1.0 X-Received: by 10.43.133.70 with SMTP id hx6mr10610598icc.34.1373488859610; Wed, 10 Jul 2013 13:40:59 -0700 (PDT) Received: by 10.64.98.162 with HTTP; Wed, 10 Jul 2013 13:40:59 -0700 (PDT) In-Reply-To: References: Date: Wed, 10 Jul 2013 13:40:59 -0700 Message-ID: From: Dave Taht To: Keith Winstein Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Cc: codel@lists.bufferbloat.net Subject: Re: [Codel] sprout 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, 10 Jul 2013 20:41:00 -0000 On Wed, Jul 10, 2013 at 1:19 PM, Keith Winstein wrote: > Thank, Dave. > > We have a Web site with more info, a talk, and source code > (http://alfalfa.mit.edu) if anybody is interested. Good Talk! Nice way to spend lunch. Boy you talk fast. The simple expedient of inverting the delay scale against the bandwidth scale had never occurred to me on the graph, up and to the right helps! How did you dynamically stretch out the graphs like that in the preso? I'd like very much to be able to zoom into those levels of detail and out again. Lastly, what was sprout and sprout-ewma over codel? (rather than vs codel) > Something that may interest folks here is that we compared > Sprout-over-unlimited-buffer with TCP-Cubic-over-CoDel on these > cellular-type links. That is, a scenario where the network operators > implemented CoDel inside the LTE/UMTS/1xEV-DO base station (for the > downlink) and the phone manufacturers implemented CoDel inside the > "baseband" chip for the uplink. of course I'm always after people to attempt fq_codel in cases like this... or fq + X, whatever X is.... > > Bottom line results is that for the case where a cellular user can contro= l > all their own flows, it's roughly a wash. To a first approximation, you c= an > fix bufferbloat on a cellular network *either* by putting CoDel inside th= e > base station and baseband chip (and otherwise running the same endpoint > TCP), *or* by changing the endpoints but leaving the base station and > baseband chip unmodified. > > Obviously we benefit dramatically from the per-user queues of the cellula= r > network. By contrast, in a typical house with a bufferbloated cable modem > where one user can cause big delays for everybody else, you can't fix > bufferbloat by fixing just one endpoint. We will have some results soon o= n > whether you can fix it by fixing all the endpoints (but still leaving the > "bloated" gateway intact). > > Cheers, > Keith > > On Wed, Jul 10, 2013 at 3:30 PM, Dave Taht wrote: >> >> I haven't been paying a lot of attention to rmcat and webrtc until >> recently, although I'd had a nice discussion with keith on it a while >> back.. >> >> this particular thread sums up some interesting issues on that front. >> >> http://www.ietf.org/mail-archive/web/rmcat/current/msg00390.html >> >> -- >> Dave T=E4ht >> >> Fixing bufferbloat with cerowrt: >> http://www.teklibre.com/cerowrt/subscribe.html > > --=20 Dave T=E4ht Fixing bufferbloat with cerowrt: http://www.teklibre.com/cerowrt/subscribe.= html