From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-lf0-x231.google.com (mail-lf0-x231.google.com [IPv6:2a00:1450:4010:c07::231]) (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 30AE33B29F for ; Tue, 27 Sep 2016 13:52:31 -0400 (EDT) Received: by mail-lf0-x231.google.com with SMTP id l131so31210549lfl.2 for ; Tue, 27 Sep 2016 10:52:31 -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=NEVj9LmIzQCx/C9jmzzsf5lmSBZb8ZcaU3ZMCUaholA=; b=ZBY4V4sBxj3prZi3TQTTdJV0hZBihnB2/uEHMMYFDTBVASsUiJX/L2FPJOWsgxJa67 xGTIZVDcA1g5B+BPClwdO6X+QVb1AeJ7G1SWzaoqIK2eAtwIbm1Ta983AdjFX3u9F94S PfAeTfLIKQNUnnIKQOpt6lkd5asMNyw/XypuXJGNcldy+CfY0asp70ZlxuaccNzZZabM ETHHTqSpArsTPm/mAB1O8itc70XM922k+HibYeJA17XzWaC5NsnQS9ck7l8T2JBAJNJo 1QYj/7M7BaqdjbN+sfi74+S9dIgZ/k6ArNIqizkJhAcUX2pQ/gjZvpFKQZ6T2RIGQRu5 eIzw== 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=NEVj9LmIzQCx/C9jmzzsf5lmSBZb8ZcaU3ZMCUaholA=; b=j1/9xqeLS9AsnS76e7BNJpIUbDTO6rrNWkjW+7FaWHg97k4iXxrtkJ+xRyz8l9XSTm hBjPeaFuqTYG61+z7zhJuXyJZHsYlxqUfS9GRPh9Mu0lf9qNp1FdglR+JxhL5ZDMWIod buJ7/RNWXg4ovQJXg7dOjIKMf9+GV7TgevHSPAjaPOLEfSJRhc6gw9thFYvHwofIf/V2 CTeGXDwQgkrR5Z5uvrmjTVYlm9DwLW5+HOywZBZ0oDActjxXm8afJO4w4dEKFiRWkXEr z1SAMuTtcg4vinv4X2PF9lhqYGYEIe/pCOJKtDpp6nwkJuTcXC2L20AeVtMUJmy3dl+J f/pQ== X-Gm-Message-State: AE9vXwNat0YMzrOjScrZ2bE+3Tc5BJS925fUOwtiYGnkGuSf3KfWDgHiKHip6/a9glJUcA== X-Received: by 10.46.0.98 with SMTP id 95mr9548769lja.35.1474998749843; Tue, 27 Sep 2016 10:52:29 -0700 (PDT) Received: from [192.168.100.13] (37-33-90-35.bb.dnainternet.fi. [37.33.90.35]) by smtp.gmail.com with ESMTPSA id 1sm584914ljf.48.2016.09.27.10.52.28 (version=TLS1 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Tue, 27 Sep 2016 10:52:28 -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, 27 Sep 2016 20:52:27 +0300 Cc: cake@lists.bufferbloat.net Content-Transfer-Encoding: quoted-printable Message-Id: <32E6B0A0-6014-4510-9D97-02645F0EFDFD@gmail.com> References: To: Dave Taht X-Mailer: Apple Mail (2.3124) Subject: Re: [Cake] cake for net-next 4.8 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, 27 Sep 2016 17:52:31 -0000 > On 25 Sep, 2016, at 21:30, Dave Taht wrote: >=20 > Judging from me tearing apart how TCP BBR works (presently) with ecn, > it looks like we need to add the equivalent to fq_codel ce_threshold > behaviors as well. If I=E2=80=99m reading the legend correctly, you are setting = ce_threshold to 1ms to get the better-controlled result. But that = effectively disables the codel algorithm and turns it into a simple = =E2=80=9Cmark all packets over 1ms sojourn=E2=80=9D for ECN capable = traffic, because it=E2=80=99s a tighter limit than codel=E2=80=99s = target. That=E2=80=99s too aggressive for non-BBR traffic. In these cases, I think you have to relax and let the FQ action take = care of it. - Jonathan Morton