From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-qk0-x230.google.com (mail-qk0-x230.google.com [IPv6:2607:f8b0:400d:c09::230]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by lists.bufferbloat.net (Postfix) with ESMTPS id 015923B25E; Thu, 20 Oct 2016 14:29:11 -0400 (EDT) Received: by mail-qk0-x230.google.com with SMTP id z190so110275494qkc.2; Thu, 20 Oct 2016 11:29:11 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :cc:content-transfer-encoding; bh=3PTTAstZgjT4Xya1TwbrHqWDbQ9lEUUrgHwnJYW20DY=; b=ILsHxenm+FZSPP6jCT+/AWsuB9mNShGc7NPjGwmLCCZy3qyF0J9dM4jLjbaFnkSLgz 2vRkiw+SVOrmjl5+ZUIImLd62AWBDRenTmgAFDBbGhou7TYjZRWPYHU29z5HDdccecil cZ1IpxzSLiLwo/kv2So5pPCIl81D+c9+7ZYTLbSGebdbs1suwCvm4nP1Niaq+Be4hcHR umSlEVH03npFKvurvaBnyHMvuD4OMWLmRR11P3r8e1owmO8JfOhzilr0Qu8vxGr+FawE H95ugj5eTVWApFpClAxyjY5uprmh7aNhxROI2V5dZyycnAB2K+U3wvV9VtNAajf6v3HC BuAw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to:cc:content-transfer-encoding; bh=3PTTAstZgjT4Xya1TwbrHqWDbQ9lEUUrgHwnJYW20DY=; b=kM1cZ2ZY1M0Vh05ItckiXeogpOidxvy1Ovj1qrC1q0DKjxMWT0LDPYlwIy3y1fbun5 b5Nx+lgoa1uuRRz9dIc3/Okw8h/uPcU9TBm96CVip2+CpLvzeb0puN2MJOTrugXCVzxG CKwNOMp1/aYOpBRFquG++j5JxqfusLDRmT/U9YT6sMyFwEMAR8K3OTvFocGz6P9ILtc9 LnSEuTWi6DX1Dp5nncVwUD3FbSwQ6uyxiW7910c2CoJ2hm3zy88/4XDgKVL9z1dvu0VT PnhC85YBPMu0CfvPtBF6XvxSmB5EawEyAVnmMjPhepfywi4ptytS0T8iHSY4iWFBbTYL WLgw== X-Gm-Message-State: ABUngvdAw1sLXNgGoQVM+hJozAUtTGI/YdRcHGtpNDPoY890M/wAD+/XVkLQBxBZC3XSDCtpyUBFyWsdwGyo3A== X-Received: by 10.55.145.197 with SMTP id t188mr1926651qkd.59.1476988151502; Thu, 20 Oct 2016 11:29:11 -0700 (PDT) MIME-Version: 1.0 Received: by 10.12.146.164 with HTTP; Thu, 20 Oct 2016 11:29:11 -0700 (PDT) In-Reply-To: References: From: Dave Taht Date: Thu, 20 Oct 2016 11:29:11 -0700 Message-ID: To: Mikael Abrahamsson Cc: Rich Brown , make-wifi-fast@lists.bufferbloat.net, cerowrt-devel , bloat , "Klatsky, Carl" Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Subject: Re: [Make-wifi-fast] [Cerowrt-devel] Comcast's NANOG slides re Bufferbloat posted (Oct 2016) X-BeenThere: make-wifi-fast@lists.bufferbloat.net X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 20 Oct 2016 18:29:12 -0000 On Thu, Oct 20, 2016 at 11:12 AM, Mikael Abrahamsson wro= te: > On Thu, 20 Oct 2016, Rich Brown wrote: > >> >> https://www.nanog.org/sites/default/files/20160922_Klatsky_First_Steps_I= n_v1.pdf > > > Does anyone understand what access speeds these customers had during thes= e > tests? What that work showed was that basically all cablemodems had a fixed upstream buffersize that is too large by factors of 25% to a factor of 10, and that 48Kbytes was a pretty good basic sweet spot... and if they could just fix that across what's deployed life would get better for everybody without fancy schmancy aqms... But we knew that already.... http://www.dslreports.com/speedtest/results/bufferbloat?up=3D1 I note that I was called into consult a bit on this project and don't feel at liberty at the moment to disclose their up/down parameters or the direction of future work. Carl's nanog talk was filmed and there were some interesting discussion afterwards about things like BBR. https://www.youtube.com/watch?v=3DcA8FPHr8h7U&list=3DPLO8DR5ZGla8hcpeEDSBNP= E5OrZf70iXZg&index=3D16 I was delighted that they used flent to exercise the connection(s). > 96 kilobyte buffer on 1 megabit/s upstream or 50 megabit/s upstream makes= a > big difference. > > (I have 250/50 on my DOCSIS3.0 connection, but perhaps it's common knowle= dge > what speeds Comcast customers typically has, that I don't know?) > > -- > Mikael Abrahamsson email: swmike@swm.pp.se > > _______________________________________________ > Cerowrt-devel mailing list > Cerowrt-devel@lists.bufferbloat.net > https://lists.bufferbloat.net/listinfo/cerowrt-devel --=20 Dave T=C3=A4ht Let's go make home routers and wifi faster! With better software! http://blog.cerowrt.org