From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-la0-x236.google.com (mail-la0-x236.google.com [IPv6:2a00:1450:4010:c03::236]) (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 537C021F413; Sun, 14 Jun 2015 12:35:34 -0700 (PDT) Received: by labko7 with SMTP id ko7so45998543lab.2; Sun, 14 Jun 2015 12:35:33 -0700 (PDT) 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=y+625UkC1e/WPFOa90lb0oAB4B7mQgtux3lAfCQSxVY=; b=0pap3zOnBIkbIsLA2xpj4ckjmKYchQkXLFZ3Bn43t84WIsNL/WznRS//5Btb/mHOyA C7fFi57omj/OxEO5o5sPt4GsiwBxZ/ssHifuWKbiZWh1K/Ah3Q/dFew8m3kJWymXsGBS zSZ8uZ7dmo1+kefsNOhBL5wX1/qrRH2K7JxTX09xLx1T8mYbibC+keoi+Bbs2wKnRLzd 6wrtZ8/+dWqVsqalmiDZ+4aZweHzn3J7ChRt7aDyvsOUbPF5MsGh2RfLiwxeQySZXfv0 r6Sps19IDT747OvPan4XhGeqcUZNvm5GueGwursyG9IBL3APu7ZIEO7qxnmryHFdb9m2 uhGQ== X-Received: by 10.152.19.8 with SMTP id a8mr18943212lae.121.1434310532981; Sun, 14 Jun 2015 12:35:32 -0700 (PDT) Received: from bass.home.chromatix.fi (87-93-133-238.bb.dnainternet.fi. [87.93.133.238]) by mx.google.com with ESMTPSA id tp10sm2193903lbb.4.2015.06.14.12.35.30 (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Sun, 14 Jun 2015 12:35:32 -0700 (PDT) Content-Type: text/plain; charset=utf-8 Mime-Version: 1.0 (Mac OS X Mail 8.2 \(2098\)) From: Jonathan Morton In-Reply-To: Date: Sun, 14 Jun 2015 22:35:27 +0300 Content-Transfer-Encoding: quoted-printable Message-Id: References: <0CFA8991-9F5E-4988-82ED-6CA0E4E08676@gmail.com> To: Dave Taht X-Mailer: Apple Mail (2.2098) Cc: cake@lists.bufferbloat.net, Alan Jenkins , "codel@lists.bufferbloat.net" , "cerowrt-devel@lists.bufferbloat.net" Subject: Re: [Codel] [Cake] openwrt build available with latest cake and fq_pie X-BeenThere: codel@lists.bufferbloat.net X-Mailman-Version: 2.1.13 Precedence: list List-Id: CoDel AQM discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 14 Jun 2015 19:36:03 -0000 > On 14 Jun, 2015, at 21:24, Dave Taht wrote: >=20 > Flows, btw, do end quite rapidly in the real world. What was it, 95% > of all web flows ended inside of IW10? It might be worth thinking about how heavily loaded a network needs to = be for Codel to trigger on such a flow. However, with perfect flow = isolation, count will start at 1, making it less relevant to the present = thread. Cake will start triggering on a instantly-arrived burst (call it a = packet salvo) after 35ms. Thus, a ten-packet burst will not trigger = provided at least 4.5 Mbps is available to that flow. However, on many = links that is still a tall order, since if the flows really are that = short, there are probably lots of them in parallel. A paced burst is much more friendly. At a 100ms RTT, IW10 could be = delivered at 100pps (1.5 Mbps), extending the range of link speeds on = which congestion signalling will not occur by at least 3x (and generally = more). Since this greatly reduces the risk of packet loss, it might = actually reduce the average time that the sender needs to maintain the = connection=E2=80=99s buffers, despite the deliberate 1-RTT delay = introduced. - Jonathan Morton