From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-lb0-x22d.google.com (mail-lb0-x22d.google.com [IPv6:2a00:1450:4010:c04::22d]) (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 CA8213B2A3; Tue, 19 Jan 2016 13:02:05 -0500 (EST) Received: by mail-lb0-x22d.google.com with SMTP id x4so112249237lbm.0; Tue, 19 Jan 2016 10:02:05 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=content-type:mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; bh=qnDg3Kd4jS2SNweunB2L9y8r4N4DDtgdYWJDgG9PR/0=; b=MpwzUsVNU4hgsrxiIbCGLThtdEHspdcqaffGUawgiVTbxLOZDrEdKBLVHplxeL/tAf 22eSb18tzcXHYZMzJAvTvJKrgBhS2m4nAZ1JoKsXwu4BxfjfCQrXFkZg1DitLN90EJ7Y yoVNj039F3CUj5zYHhveW+SfF7RFQO+4meOfti+V3G/yBFJi9LF3Xj+q8frUdNy0F0+X /3cHnlLGldoj+6i9WKqtodMOPmZSY2/jsUzsFW/PRsALLcTI5z7SeGlGHwIsulVJiBmz nMfnHpJdhLEt/wDTRxUgloLc9L17N+32qZ1gMxdYU+ej8sclJewUs48Q3i3iEs8juMrA iMYw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:content-type:mime-version:subject:from :in-reply-to:date:cc:content-transfer-encoding:message-id:references :to; bh=qnDg3Kd4jS2SNweunB2L9y8r4N4DDtgdYWJDgG9PR/0=; b=Jjdofu1yxiZ713EdR2mXtsYYBTjjD9qGez6rCEPZKPTZIyiwsxwh2DAEQsdDvoK9iN spvYOb/t3Uf2mi0oHVtVB6rOLIgGK+ZuyfHNNQixk91Cgk7OULcLJgT894z6AqCmMi5V FHcgw9MFoTMOd/y1wKKkoQCPYC0CvMPB/YNIO/m0ScdZH1+2jNK0Z50uypDqAzKuEI7C 98hnTg3ZuXyn6OAcehWyQEbvfQ7t2i2X/n7M2aC4pYFITd5fxXFZY0zm5/9LEqH4TbBb ykbibUZc+rdPcwEf5XGifjUeZgHVmdyghOmdu36y7yfBpgO+sBmnKm+Zfyr087IsnDHt Vp6g== X-Gm-Message-State: AG10YOSnmyI9I6amo5n9C8XaNRPbtpfNnD9QjwDwZB6gRqb+NtMY6SVDa8D1/LMxQ52lag== X-Received: by 10.112.126.72 with SMTP id mw8mr4571411lbb.14.1453226524202; Tue, 19 Jan 2016 10:02:04 -0800 (PST) Received: from bass.home.chromatix.fi (37-33-99-74.bb.dnainternet.fi. [37.33.99.74]) by smtp.gmail.com with ESMTPSA id rx3sm313277lbb.35.2016.01.19.10.01.38 (version=TLSv1/SSLv3 cipher=OTHER); Tue, 19 Jan 2016 10:02:03 -0800 (PST) Content-Type: text/plain; charset=utf-8 Mime-Version: 1.0 (Mac OS X Mail 9.2 \(3112\)) From: Jonathan Morton In-Reply-To: <274D3A0FA900FD47AA6B56991AAA32FDC548019C@wtl-exchp-1.sandvine.com> Date: Tue, 19 Jan 2016 20:00:02 +0200 Cc: "Agarwal, Anil" , =?utf-8?Q?Dave_T=C3=A4ht?= , "aqm@ietf.org" , "cake@lists.bufferbloat.net" , "codel@lists.bufferbloat.net" Content-Transfer-Encoding: quoted-printable Message-Id: References: <274D3A0FA900FD47AA6B56991AAA32FDC547FC0F@wtl-exchp-1.sandvine.com> <569D6DEA.9050603@taht.net> <7A2801D5E40DD64A85E38DF22117852C881A1224@wdc1exchmbxp05.hq.corp.viasat.com> <274D3A0FA900FD47AA6B56991AAA32FDC548019C@wtl-exchp-1.sandvine.com> To: Jeff Weeks X-Mailer: Apple Mail (2.3112) Subject: Re: [Codel] [aqm] codel with low shape rates X-BeenThere: codel@lists.bufferbloat.net X-Mailman-Version: 2.1.20 Precedence: list List-Id: CoDel AQM discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 19 Jan 2016 18:02:06 -0000 > On 19 Jan, 2016, at 19:32, Jeff Weeks wrote: >=20 > Dave, What does HTB stand for? I'm not familiar with it. Hierarchical Token Bucket. It=E2=80=99s one of the two most commonly = used shapers on Linux, the other being HFSC. > Perhaps this is an area where fq_codel would perform better? Very likely. My experience is that flow isolation (which is what = fq_codel adds over plain codel) gives the single biggest improvement to = perceived traffic quality of all the techniques I=E2=80=99ve seen and = used. Codel also works significantly better when it only needs to = signal to one flow at a time. If you plan to try out HTB+fq_codel or HFSC+fq_codel, then I would also = suggest trying out Cake. It=E2=80=99s slightly more involved to set up = since it=E2=80=99s not yet upstream, but it=E2=80=99s a no-knobs-needed = solution using even more sophisticated and comprehensive algorithms than = fq_codel. I=E2=80=99ve just finished adding =E2=80=9Ctriple = isolation=E2=80=9D to it, and I plan to make it the default in the near = future, unless someone turns up a major problem. - Jonathan Morton