From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-lf0-x241.google.com (mail-lf0-x241.google.com [IPv6:2a00:1450:4010:c07::241]) (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 748E13B2A3 for ; Mon, 1 May 2017 08:08:22 -0400 (EDT) Received: by mail-lf0-x241.google.com with SMTP id x72so12970347lfb.1 for ; Mon, 01 May 2017 05:08:22 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; bh=W7uMf9Ym9IbfdbB9UBgSCvXnTjD1j3/dlim4WNT8ZCw=; b=U9+55gwoc85Eaqq+hqL4G0gRl/A+383HbQMgKVcSsyTgeILti5YsHbhmVtu9c8Zobi Jbb023iYAK9xMBPtVuFPGnB4i9bgO6kyNLdwMCJA5WgOaabVm2wi1VrWF6h8M9woONBy cdpKnMjFhBlZT7KP/lLQJ1M7dMQs+W8M1NoBFjE+AnLuigk4BbUV4csNtwn8RVb9rCI9 LoyB9vpUamgoxpzWAlAXsEUNBMZ7ut5Y5t9L8oXV5Uvk0vUhNrjuiI/7ci09VpbHCvXb QKiBMjhpDrYEzk1OAWFkU5nzSppPWSedvgsP/+993+sFfw9dhb2EbpM/try3N3Ta6NKn MNtw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; bh=W7uMf9Ym9IbfdbB9UBgSCvXnTjD1j3/dlim4WNT8ZCw=; b=AZZK1IWGsEbXSHdf8RxHB0un2RZzTnFRl++0m+rrwfDa8wmOlMK3Y7OwX58FD0AIAL fkwJHtjCeSZmMiKcJdahzW9g4XphiObXbji/iJurG73VsFTt9pWooPXOYxaDPCDrfX9P UBP9zpS3Bruo8vXYiKzQNlj3C0ofJYDwMFhYVr/LewJkg13q/qJToPltuyE/AakJIIfu s8MGOw0s1/ncK3sD7oyCibSBj26o/2bPjG+uQEMQO21agaDP7aorRX4RWT+Nlz3DK3h7 DPUdWAcrTpujJu2smKFwoq/Mlrj9ccwPlw66l5O+sEVPBjI3fG7wd4YcGEvjz3rk/h17 RhlA== X-Gm-Message-State: AN3rC/65q/die8quF5Im7II07Euco1cuTwaqeANzNiq9ASnLzJb9Hu13 nkU95xiVdRM4Qw== X-Received: by 10.46.33.11 with SMTP id h11mr9809149ljh.57.1493640501102; Mon, 01 May 2017 05:08:21 -0700 (PDT) Received: from [192.168.100.12] (37-219-103-185.nat.bb.dnainternet.fi. [37.219.103.185]) by smtp.gmail.com with ESMTPSA id h192sm2656901lfg.56.2017.05.01.05.08.19 (version=TLS1 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Mon, 01 May 2017 05:08:20 -0700 (PDT) Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 9.3 \(3124\)) From: Jonathan Morton In-Reply-To: <8d2720cb-fd26-0ed8-5e59-c9a062384966@gmail.com> Date: Mon, 1 May 2017 15:08:17 +0300 Cc: Dendari Marini , Benjamin Cronce , cake@lists.bufferbloat.net Content-Transfer-Encoding: quoted-printable Message-Id: References: <0BA3EE91-C5BC-4155-9D5D-D15D34490A1A@gmx.de> <00DDAA0B-7D99-489B-BA2D-1F20289409B3@gmx.de> <2FFBF256-2932-4FC7-AD1F-0D7CEE111809@gmx.de> <3fbfd0ee-7b41-0f83-8b44-ce7eed6a0562@gmail.com> <09DB0D8E-F63C-4126-8608-9EACDE99D2F1@gmail.com> <8d2720cb-fd26-0ed8-5e59-c9a062384966@gmail.com> To: Andy Furniss X-Mailer: Apple Mail (2.3124) Subject: Re: [Cake] Getting Cake to work better with Steam and similar applications 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: Mon, 01 May 2017 12:08:22 -0000 > On 1 May, 2017, at 14:32, Andy Furniss wrote: >=20 > Well it seems distance is important for BBR. It seems to have a design > whereby your rtt to the server determines how badly it will bork your > latency. Unlike cubic it doesn't take loss/ecn as a hint to get out of > its exponential phase, which is IMHO not a friendly thing to do, I = mean > didn't they think people have to share connections :-( >=20 > Playing with a sim, something like dash that grabs a meg waits then = gets > another with a new connection needs crazy amount of back off to avoid > borking latency every chunk. The amount of disruption getting worse = the > higher the RTT of the TCP. Just to be sure - are you running sch_fq on the egress interface(s) of = the BBR sender? If not, *you are not running BBR*. BBR needs the = pacing functionality of sch_fq to work correctly. - Jonathan Morton