From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-lf0-x234.google.com (mail-lf0-x234.google.com [IPv6:2a00:1450:4010:c07::234]) (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 AD6D83B2BC; Sat, 4 Jun 2016 10:16:23 -0400 (EDT) Received: by mail-lf0-x234.google.com with SMTP id w16so70404150lfd.2; Sat, 04 Jun 2016 07:16:23 -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=SqigSgHHq2ImWIKNB0DlW78uwBZvl6IUdJWNcKOz5ac=; b=WadkpEDYqUQAQXb7n+GGY7xwl+ZJXZAJgmp/e9ZvlU5Kni7Ew/OD7Mv8moA+cUNNIM Wfv2VJXMnERrgfiNOt9FKGymbM1vy0c+t+pz5vtam6fMC4tudgpK8ueZzMjM8JCZq6Zm UwDxCYDcXTEM/eenoJElT+2fGl/3FAunr+4BRuRvHc9Pa7XKSUpyLrcPFpe0iRVXLqrs nQ0W6sM53DqHPkjJHq2rr6cxK/iEPRtJqLsw2bl2XwPZAAnB1ZmZGsfSvMmnu+lvgqXS dxjOZVEUolGnj/Nb656P0xq0aS8VnoHVPsD/X8Sma4Kpk8UIXuBe1YY1eB+HEzKCIBqL 98Bg== 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=SqigSgHHq2ImWIKNB0DlW78uwBZvl6IUdJWNcKOz5ac=; b=mOWORFIDM4WIn8kRA9BE19FRthxHkqSdDpKLMDXE6yltqMdfJbb7Rp41em/dDWc56j 60egMpdBjftu+XPIehjl5dpqejeNK82YT5FVD68MjQDJO7bijnJrvuu2tZ0SEhbhripb +xs2CcmvNIsvMkSrNygesAajQLSJFtXsYTPuZTX0y+nlQSBvvrhuVXZ1ygv/KXLqI90B VRb+IB6CSdFgOn99kKKcwoLBTH7xAkiHy4NQxmxLXJoLZRK8huDa867m72MUoPHC3p/M 9YovLp5zPtDRrPQrjg/Wy2c9pycDQJPfx0Qq9zFaMyKBZ2tgblGqGnRzSkAXRsiKbgC0 XPWA== X-Gm-Message-State: ALyK8tJaR5zXZCdkOPkQ4Qn425B0P6wwnWVBy0STt03rQsoTu6yWUHGH1Gu0hMrDlMdYOA== X-Received: by 10.25.149.19 with SMTP id x19mr1933162lfd.0.1465049782551; Sat, 04 Jun 2016 07:16:22 -0700 (PDT) Received: from bass.home.chromatix.fi (37-33-56-85.bb.dnainternet.fi. [37.33.56.85]) by smtp.gmail.com with ESMTPSA id i5sm981662lfe.6.2016.06.04.07.16.21 (version=TLSv1/SSLv3 cipher=OTHER); Sat, 04 Jun 2016 07:16:21 -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: Sat, 4 Jun 2016 17:16:20 +0300 Cc: Andrew McGregor , cake@lists.bufferbloat.net, "codel@lists.bufferbloat.net" Content-Transfer-Encoding: quoted-printable Message-Id: <0CB3F4FC-5AC2-4B13-8CC5-B6593AAEBD6E@gmail.com> References: <22371476-B45C-4E81-93C0-D39A67639EA0@gmx.de> <857AEE56-E7DB-4981-B32E-82473F877139@gmail.com> <8AB0D25D-C1CA-45F1-889E-2F73CF8C44F7@gmail.com> <323AFC22-A092-4F59-8197-AF21EF73FD58@gmail.com> <274D3A0FA900FD47AA6B56991AAA32FDC5529FC8@wtl-exchp-1.sandvine.com> <574478B4.7080103@taht.net> <39F38477-A877-4C1B-9B7F-BB3358425F17@gmail.com> <0eb223f9-2873-7f53-c2ce-c6867ddec17c@gmail.com> <48A25043-19E2-4BB7-B634-A4003F7BE6F8@gmail.com> <01BEA343-7C07-46FA-8DC4-07BF26309FC8@gmail.com> To: moeller0 X-Mailer: Apple Mail (2.3124) Subject: Re: [Codel] [Cake] Proposing COBALT 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: Sat, 04 Jun 2016 14:16:23 -0000 > On 4 Jun, 2016, at 17:01, moeller0 wrote: >=20 > Maybe cake should allow to switch from the default mark by ECN policy = to mark by drop per command line argument? At least that would allow = much easier in the field testing=E2=80=A6 As is there is only the option = of disabling ECN at the endpoint(s)=E2=80=A6 I consider ignoring ECN in the way I described to be a fault condition = inevitably resulting in unresponsive traffic. As a fault condition, it = should be rare. The main effect in practice is that the RTT for the affected flows grows = well beyond normal, but since they are bulk transfers, this has only a = minor detrimental effect (much of which is incurred sender-side in the = form of retransmission buffers two orders of magnitude larger than = necessary). Rather than further complicate Codel or Cake, I=E2=80=99d like to simply = apply a general solution for unresponsive traffic, ie. COBALT. - Jonathan Mortob