From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-lf0-x22c.google.com (mail-lf0-x22c.google.com [IPv6:2a00:1450:4010:c07::22c]) (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 4FA883B260 for ; Tue, 19 Jul 2016 04:09:32 -0400 (EDT) Received: by mail-lf0-x22c.google.com with SMTP id f93so6938410lfi.2 for ; Tue, 19 Jul 2016 01:09:32 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; bh=PzFOagJdjjLU1sAhLQIoeAlKRMo+NnLO+imGR1U0+9s=; b=eE1FS0i+Sd0ClrfkoGcmmoqe/oBxCPhLZfJxsPPFeGt/9T+sVJifiRHdwNCwNm1m2o c4VqZ6ERb0zMyE6HkCu57prqC+H2uZ1e7Av3Mfbw4UxiLInVpqAPIWYAETZixAKhgRKo aY2Uw4lpbvp0pKucHWpitMIt2A6JuheVQz924KXD28ttLmBBQyoDFy4VRYauaujH/jRo xDAp2Q9zW2GCd4YzXAdVw1M8tpA6jY2m7vSNEi6uBhsF/V3HKvEWU8XfVcV1DgkbAO19 dBWYKe2Ose3e5iQhdL9p889j0wwbS2ZqFW1Y7YwJ0iH0TySPL4bzoJNmrogA6Te00W85 FGuw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; bh=PzFOagJdjjLU1sAhLQIoeAlKRMo+NnLO+imGR1U0+9s=; b=mUjU79yqAcLGlqPD5RtELZdXy9e2DdW924Jjj5iG8rmvf2nkFqAVOXBacpLsX0qdKa Q0yaDYU+v8OImjDpQpUAxqbgHA3hOlisG9wIRFl1KD3aHtpfDOxOYX1up0nsNOdP7KAb bdGq/XzeNRZBYODFpC3wPQTtjQXwErTd1rpPL1NxQB9mIX1eBO6qf+n43ASvD2c5E4kS DwwKuPTvlhQ4luB5l8oTcBiOXn6rSHA0bq1g/06UyNIuqVcnu4kzOFRvZGtYugadYI/e 1ZEST79aXUNiy6ZyVZM5JrCZHp168ircH0h2SD3uRlwx/I3drTuGOehAG9zOOSrFDuV2 k32Q== X-Gm-Message-State: ALyK8tIXWyOPkGJKlO8gW9930Ks7iXSGejfZtdzDW9ffNzdtyhBQdvZDVyynZkn14hAVUA== X-Received: by 10.25.149.76 with SMTP id x73mr15953607lfd.27.1468915771094; Tue, 19 Jul 2016 01:09:31 -0700 (PDT) Received: from bass.home.chromatix.fi (37-33-96-207.bb.dnainternet.fi. [37.33.96.207]) by smtp.gmail.com with ESMTPSA id e18sm5219951lji.35.2016.07.19.01.09.29 (version=TLS1 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Tue, 19 Jul 2016 01:09:30 -0700 (PDT) Content-Type: text/plain; charset=utf-8 Mime-Version: 1.0 (Mac OS X Mail 9.3 \(3124\)) From: Jonathan Morton In-Reply-To: Date: Tue, 19 Jul 2016 11:09:27 +0300 Cc: cake@lists.bufferbloat.net Content-Transfer-Encoding: quoted-printable Message-Id: <66C89432-6E70-422F-A638-7522BF233707@gmail.com> References: To: Loganaden Velvindron X-Mailer: Apple Mail (2.3124) 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 08:09:32 -0000 > 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 ? 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. 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. 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. 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. - Jonathan Morton