From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mout.gmx.net (mout.gmx.net [212.227.15.19]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.bufferbloat.net (Postfix) with ESMTPS id 622B63B260 for ; Tue, 19 Jul 2016 06:16:30 -0400 (EDT) Received: from [172.17.3.79] ([134.76.241.253]) by mail.gmx.com (mrgmx001) with ESMTPSA (Nemesis) id 0MAQXq-1bWYnx2rco-00BgCR; Tue, 19 Jul 2016 12:16:27 +0200 Content-Type: text/plain; charset=utf-8 Mime-Version: 1.0 (Mac OS X Mail 8.2 \(2104\)) From: moeller0 In-Reply-To: <66C89432-6E70-422F-A638-7522BF233707@gmail.com> Date: Tue, 19 Jul 2016 12:16:27 +0200 Cc: Loganaden Velvindron , cake@lists.bufferbloat.net Content-Transfer-Encoding: quoted-printable Message-Id: <35967373-D9F6-4C0C-8005-787DB8C7B1BB@gmx.de> References: <66C89432-6E70-422F-A638-7522BF233707@gmail.com> To: Jonathan Morton X-Mailer: Apple Mail (2.2104) X-Provags-ID: V03:K0:3YxOrjq7ftJHud6e/hqHKOQpQMiwS/4CWjuFwl5a++dpLF1qVvZ D8sGBTMPfduHjvg/ALYWdHmC+Atq8coXS+TMQUZr0PdrQZPCkcZZockL5Jma+JZtnakfngS jvdB+ZfX2SuqOnjyqgyrhzReGG+1KHCEMS58iUUUbRSGMMx5p2dByplbOLb0PCTlJXJw/S4 hOOxGX1FiykFuPa8DTF8Q== X-UI-Out-Filterresults: notjunk:1;V01:K0:KsP3BYY5CpQ=:Vs7aQZ+hPuW41B/A/wPr6q XkqOKCP6V5CgUBI9vmVHhp3HMxWDbrwh/Ev+qA7jSs0o4Tg2hG3zGMxahlrmbK8iMURuuDtYl mF0APcqwtp6fizq2D2A/nV5wj4DJpFyqaD0/YaGurrXrERG1IGfAz6pp3o7zNdab2MK+08bo6 pjxLoKrDcRWmqlBfzGSVIxStGX1GBfDK3V3j1UKq/cVpOTe6Q77bT9PHCs9EzHAalZtjJYNhf /NdEGJA9Vo6hL+eeWG0g2Rj0bE3tboK1SB98H37799Ofcjs0YWUqsHbb8k7Km7m3TdHYtcP+z ih91ECekOYkl0jLGsAIfkgxwiQsnCsJGPfUIdBuQIwCB5jHLCbrKwXNRknE7jHvq7b4Yzddrr khyqArE50DjmK8MlHhCkaOtMEeuFyw8gWtxVhnRiUPJ8QspKdEwUefahx+Y4+VNuavUySD74C aslxRDL33hONG0ZC7w++aTFv5+onyDs2k0baZb8XeqQLRsc/qH/wi/pIjL7atmk1GvMQClTQ1 7rfbacdW0izMZ0GrrsAW/DpN9p5YS4TeMKDsJ3cczUf+doKIjbqC7gnQTegd95xcbyxUDI7wN 9TCg4fgTUDsv600ZnaQBv1+qYSImwZx8WxMiTM/yvItBk+Ev4yJ1hM5I0Mpllqfq//oZ3c2+Z 3tz9RcGv64X8D6Hit9ND3eWripeLkHUoXAkcrZMEKW3D9wr3vdDteOfJ3W58XiJSAdUULa/wa /DDf1jRWHXrtNlfPuC8tnpTzXGaCfc/GtcBR8wDr34OzXzgfdxDIe8RpHIBX7drYKmTcSzF1a KwAoguk Subject: Re: [Cake] fq_codel on 3g network in Mauritius X-BeenThere: cake@lists.bufferbloat.net X-Mailman-Version: 2.1.20 Precedence: list List-Id: Cake - FQ_codel the next generation List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 19 Jul 2016 10:16:30 -0000 Hi Loganaden, > On Jul 19, 2016, at 10:09 , Jonathan Morton = wrote: >=20 >=20 >> On 19 Jul, 2016, at 07:29, Loganaden Velvindron = wrote: >>=20 >> I've been playing with fq_codel on 3g internet connection. the 3g >> internet box has no bridge mode, and just forwards every packet to = the >> Openwrt router. >>=20 >> Here are the results without: >> http://www.dslreports.com/speedtest/4470186 >>=20 >> And here is the result with fq_codel on and 300 ms target latency: >>=20 >> http://www.dslreports.com/speedtest/4470286 >>=20 >> Is there anything that could be done to get the rating up to A+ by >> tweaking the code ? >=20 > You say fq_codel, rather than Cake. Presumably it is paired with some = sort of shaper, such as HTB? This is important, because I think the = shaper is influencing part of your results. >=20 > On downstream, you have one high latency sample (750ms) in the middle = of a series of reasonable ones (250ms). This implies a momentary glitch = in your connection, which isn=E2=80=99t unusual with wireless links. = Re-measuring might eliminate it. >=20 > On upstream, you have two very high latency samples at the *beginning* = of the run, which then clear out to approximately the baseline latency. = This is a classic sign that your shaper is letting a burst of traffic = through before actually starting to control it, which is typical = behaviour for token-bucket shapers. That initial burst collects in the = dumb queue of your 3G modem and takes time to drain away. >=20 > Cake uses a shaper carefully designed to *not* burst in that manner, = while still maintaining full throughput regardless of timer resolution = and latency. Using Cake instead of fq_codel+HTB will therefore probably = improve your upload characteristics. I believe that the way sqm-scripts simple.qos and simplest.qos = use the HTB shaper are not subject to this specific issue (we do not = configure/allow HTB to burst at all). Looking at a number of my speed = tests seems to support this observation = (https://www.dslreports.com/speedtest/636817 simplest.qos, HTB+fq_codel = no initial bursting). Best Regards Sebastian >=20 > - Jonathan Morton >=20 > _______________________________________________ > Cake mailing list > Cake@lists.bufferbloat.net > https://lists.bufferbloat.net/listinfo/cake