From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mout.gmx.net (mout.gmx.net [212.227.17.20]) (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 DF4193B2A4 for ; Sun, 26 Feb 2017 17:21:06 -0500 (EST) Received: from [192.168.42.241] ([80.135.86.105]) by mail.gmx.com (mrgmx103 [212.227.17.168]) with ESMTPSA (Nemesis) id 0M93Jp-1ccNdU0cIv-00CQ9d; Sun, 26 Feb 2017 23:21:05 +0100 Content-Type: text/plain; charset=utf-8 Mime-Version: 1.0 (Mac OS X Mail 10.2 \(3259\)) From: Sebastian Moeller In-Reply-To: <3c0c8aab-2a9a-82a4-0828-d58c604d35dc@gmail.com> Date: Sun, 26 Feb 2017 23:21:04 +0100 Cc: Jonathan Morton , cake@lists.bufferbloat.net Content-Transfer-Encoding: quoted-printable Message-Id: <028AA856-B11E-4025-B1BD-84BAC6768508@gmx.de> References: <75e10bac-f982-655f-0ef6-483a36797479@gmail.com> <6EA3F28B-2A50-4BDB-A0D4-B94207BFF1A4@gmail.com> <3c0c8aab-2a9a-82a4-0828-d58c604d35dc@gmail.com> To: Andy Furniss X-Mailer: Apple Mail (2.3259) X-Provags-ID: V03:K0:rtFAsE1tGtzQQrwu4ZD6ElWPluCACuTh7URnBm/c7B+qWj49TsL nlj9hSHbyXt2EjzuTUifgGTqyi+cYtIncivzuD9UELDlIQUIovyqjr85LEX9Ss6PS/yDVWp ms/1SytBACQnnWVJf4YKZh3ArQvHf5/XVSSegrBEVXfgtvOpqe794kMPwWJDrHDN6Y9H41B Lsqrenb3El9aG2UoY95Pw== X-UI-Out-Filterresults: notjunk:1;V01:K0:+30Lf7kffN8=:tNTV0ulCUCrUcfJPr+z2l7 b9JUgW/SDStIUqQi+3qiG4pcz8ipRZHhvRQnezaV1yDxye6djBqyCvYGWk47a0Q1sT8e77HA1 gvu9JHUZhlf0uZVNJwsj5zytRHBNpZT8SkwSkTTJ5Qlb+NGqKCABsKjcZvd+dF3wk9Wm63klO iGOdPjyhJX5Xc13uV6mxQe2WayW6RzUG09vy631BxzQKi2O2xjr87thWoaNYQPg0hyrAfb1mY 5hQrPLvAAm7VIjqCczUlWQXRf61658iWpf2ZPFQCeCo3//myIO2Wr2VuTJEGByhtw5cz9Hw/m k6NwUTch4NEM3vVFwoY/jqgg6yU7h8CJ4Es0bRBXbvwiBwKinDrldNva4P673LLW0VQxAJ2yL kFctGYvUYtETc4lrE0JVQrRk0Gd88b5880VFp6tfulj+hcMO5keQeC14O5XGbUfrRiYdpLZ6o HPbk8nwqdXdnlotPQUoLQfC614M+KltIPTJ320wrr0SkD/4qvx0wX6POKQO1xGI4i8e2drKhn oCi1D6XQeAfqQOqP2kAPYWPRTKr9O7WBarq10tNPSVz6tg4jMVveqI66c3gcdJom48pxIP1Wf g8DI9PGnWM4SuMxVUQ3YcPUu+oo7rRrcHvqHdh1Kn3s2u9dXkj5ppaKfxjQvHsH/yB2qryITX ANT7wYgv75jpztFmVLT9fQDnRbwvweqFaHS25+K8hIn2TDMA7fMFm9yren7xDKQ3dYJPuBgSN lWMMQNFWVPjt09dS7a6dp1p22vD0FVqQXIrxMemJ5gTtVV7ZPtWm15ItTb6TL5PC/2ebDp85z vRYVzZz Subject: Re: [Cake] 5ms target hurting tcp throughput tweakable? 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: Sun, 26 Feb 2017 22:21:07 -0000 Looking at tc-adv, I would recommend to use =E2=80=9Crtt 50=E2=80=9D = (maybe it is =E2=80=9Crtt 50ms=E2=80=9D) which allows to directly = explicitly request a new =E2=80=9Cinterval=E2=80=9D (which IIRC is = corresponding to the time you allow for the TCP control loop to react to = cake=E2=80=99s ecn-marking/dropping) =E2=80=9Ctarget=E2=80=99 will be = calculated as 5% of the explicit interval, in accordance with the = rationale in the codel RFC. Best Regards > On Feb 26, 2017, at 15:34, Andy Furniss wrote: >=20 > Jonathan Morton wrote: >>=20 >>> On 26 Feb, 2017, at 15:16, Andy Furniss wrote: >>>=20 >>> Is there any way or plans to allow users to relax slightly the = target? >>=20 >> You can do that by selecting a higher assumed RTT, for instance with = the =E2=80=9Coceanic=E2=80=9D or =E2=80=9Csatellite=E2=80=9D keywords. = This also increases the interval, which makes the AQM less aggressive in = general. >=20 > Ok, thanks, I'll try. >=20 > I didn't know what the implications of "lying" about RTT were. >=20 > I do know that on a 60mbit ingress test I did to london =3D 10ms away, = when I > tried using metro =3D 10ms I killed single threaded throughput, so was > wary of changing defaults after that. >=20 >=20 > _______________________________________________ > Cake mailing list > Cake@lists.bufferbloat.net > https://lists.bufferbloat.net/listinfo/cake