From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-la0-x234.google.com (mail-la0-x234.google.com [IPv6:2a00:1450:4010:c03::234]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by huchra.bufferbloat.net (Postfix) with ESMTPS id 393A521F463 for ; Sat, 20 Sep 2014 08:56:06 -0700 (PDT) Received: by mail-la0-f52.google.com with SMTP id gq15so4621220lab.39 for ; Sat, 20 Sep 2014 08:56:02 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=subject:mime-version:content-type:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; bh=dWnuqShNuzMOB1OJxJpIAql6E7hQ7b6RCxqVa4XsXMk=; b=T9Tum4L/F6TysvoAcI+Ow/zm2d7MXxpV3BiawIMlNQq6zhAU9EfdVBHFhmEcX77gkR lwJk0TR7Z3OcowNFfiD2wHHB/Cu+XktAeSXKoNRF9SC6OMe5/Icx9hHnoErykZwbx2QI Lw+WKVJ5Wt3sYVIdjp2ZD9A+o4fMIXe5hxM7gc/gJ2V8mj6TvmDuERrsGsEtEnySxmQm usS7aUES44Iz2w6MUzTXPCJOMcruX6yZRga3T3NsOR/yUcxdc1CYH/c1+n2j8pT3peXU NiJVvLUmlhVr8pPuczuUW8HLNJJV811TcQW3JuHPtxdzFtnfoTo5ckGc9SvvG361tcYJ cG8w== X-Received: by 10.152.5.168 with SMTP id t8mr13662776lat.67.1411228562607; Sat, 20 Sep 2014 08:56:02 -0700 (PDT) Received: from bass.home.chromatix.fi (87-95-87-164.bb.dnainternet.fi. [87.95.87.164]) by mx.google.com with ESMTPSA id l13sm1777547lbh.32.2014.09.20.08.56.00 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Sat, 20 Sep 2014 08:56:01 -0700 (PDT) Mime-Version: 1.0 (Apple Message framework v1085) Content-Type: text/plain; charset=windows-1252 From: Jonathan Morton In-Reply-To: <20140920090316.GA25876@sesse.net> Date: Sat, 20 Sep 2014 18:55:59 +0300 Content-Transfer-Encoding: quoted-printable Message-Id: <0878F265-DDEA-416F-A54C-7B860A9C3A31@gmail.com> References: <20140920090316.GA25876@sesse.net> To: "Steinar H. Gunderson" X-Mailer: Apple Mail (2.1085) Cc: bloat Subject: Re: [Bloat] I feel an urge to update this 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: Sat, 20 Sep 2014 15:56:35 -0000 On 20 Sep, 2014, at 12:03 pm, Steinar H. Gunderson wrote: > On Sat, Sep 20, 2014 at 02:33:06AM +0300, Dave Taht wrote: >> http://tools.ietf.org/html/draft-gettys-iw10-considered-harmful-00 >=20 > The pedant in me wants to point out that 4 -> 10 is not =932.5 times = worse=94, > but =932.5 times as bad=94 or =931.5 times worse=94 (just as 4 -> 5 is = =9320% worse=94, > =930.2 times worse=94 or =931.2 times as bad=94). ISTR seeing some concrete test data showing that IW10 doesn't even work = as designed, unless TCP pacing of some type is used to spread out the = burst. That's *despite* bloated buffers. Really puts the nail in the = coffin, if you ask me. The recent work on SQM could be added to the list of mitigation = measures. Also, by keeping inter-flow latency low, it greatly reduces = the original motivation for IW10 in the first place. - Jonathan Morton=