From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mout.gmx.net (mout.gmx.net [212.227.15.15]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "mout.gmx.net", Issuer "TeleSec ServerPass DE-1" (verified OK)) by huchra.bufferbloat.net (Postfix) with ESMTPS id 87D7521F608 for ; Sat, 6 Jun 2015 08:04:53 -0700 (PDT) Received: from android-b63775e537c8d87d.home.lan ([217.237.71.188]) by mail.gmx.com (mrgmx002) with ESMTPSA (Nemesis) id 0MPDeK-1Ywrvm3T2u-004WAe; Sat, 06 Jun 2015 17:04:50 +0200 User-Agent: K-9 Mail for Android In-Reply-To: References: <5572F7E0.3060602@darbyshire-bryant.me.uk> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable From: Sebastian Moeller Date: Sat, 06 Jun 2015 17:04:48 +0200 To: Jonathan Morton , Kevin Darbyshire-Bryant , Jonathan Morton , Kevin Darbyshire-Bryant Message-ID: X-Provags-ID: V03:K0:hqx6l1RTMdXbtRmP5iVkk+AxMRsYMx7qrQlzFh5dsGNSRbcu/Zk m472RxkFSua5EvMCc7Qcb4dd0TJrpW2NqHS89wqa2zxwyysryi4UBf+bqAzqW5pxJIInGdp TfHL08dN/eJ4igEdlRmzeBISaXm7D69nVZJXaQH6mmX7ZaOdSoiiJtIvzTg7YbbyZLzCVXJ DhPHVSe3GdSPgkcIkIkkA== X-UI-Out-Filterresults: notjunk:1;V01:K0:58y7yd0BMU0=:Q4F//dJmCooeOYoQuzyjDJ tMfGjq+adZ5nCalT6o4AbIXC7kldn2xD0DR8NUly97NpNjU4owa2jw0UhoZWs09ibYAACphHC 904C2RYZwhigEwrEIyw/fuOzWoR8x+9Q1h1PFDZrwXqXU/qh90uLHPwVddY3hpGYqQsYQW+C/ hN/vSjRraYmwE9gLlADMNXYr7RXJyBJSRc2EJfyxSMMX14HkVHRjvQg1ZACaD9c3OPnbL7Qlq W2BnKkHj3YXat5qA9hqRnPVs75Uiq1pGmDrEJ+pTxBFI8LOxGi4+3rXHSzJ7688Je9Tebuzl0 rGnFRsI53+xAWKxRl9vCoV1fC2T8PGoqeEB3CkJDOzIXEiUn59MyOQgzK8NDfJ35O0I877N2c oOl45Rr9j+FkBJHN5E6wD5+SNNDd7uc1qVDMemDrc8ZXm5zneHJObbk2vwBUM7/Gi1DMKA3ts rVCygKN8MlAFA1yLdx39CQqC7174s6c4ySAgVBCx2qh/mmDwMYNfioG/rTffiTbqLHotUsN/n KAjUa52KNFRZHr3KCqKdZt6VOWOXa7MQqASL+dUaSP7GIEi5W2rGOKoPwEheiZv/Rd25UICiU zIwZfod2DCvoWB925r8bo00kl51o3jav2L98EXQEUqdM5mvdztBLilH0Mb0x+Emo36HeOvZbL ag9iC7CLoQlbio5zVK4A7mSgOw8pdwivZgMFfftG/pfxSilEtWhurwc741IHcVt8R8fw= Cc: bloat Subject: Re: [Bloat] ADSL, ATM drivers, bloat, education & confusion X-BeenThere: bloat@lists.bufferbloat.net X-Mailman-Version: 2.1.13 Precedence: list List-Id: General list for discussing Bufferbloat List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 06 Jun 2015 15:05:22 -0000 Hi Jonathan, hi Kevin, hi list, On June 6, 2015 3:53:43 PM GMT+02:00, Jonathan Morton wrote: >Ideally, one would read the raw sync rate out of the modem (there has >to be >a way to do that, since it is able to report it in the web interface), >and >use that to set cake's bandwidth parameter=2E Unfortunately ISPs more and more implement a throttle/policed? at = the BRAS level which in essence supersedes the link rate, but does not seem= to be universally reported=2E If ISPs would actually use this in a way tha= t keeps utilization high but latency increase low all would be dandy, just = alas they might be trying but at least not all of them succeed=2E So people= should start out at the modems link rates but should be prepared to reduce= the shaped rates until latency under load seems bounded to acceptable leve= ls=2E=2E=2E Best Regards Sebastian=20 You could update it >periodically using "tc qdisc change =2E=2E=2E"=2E > >You will need to set the overhead calculation correctly, probably using >"pppoa-vcmux" or similar, depending on precisely what encapsulation >your >ISP uses=2E If you're not confident about that, specify "conservative" to >begin with=2E Once you have that, you can experiment to see how much you >need >to reduce the raw sync rate to achieve full bottleneck control - >hopefully >not much, at most 1%=2E > >The same approach would also work for inbound if necessary, except that >you >would need to reduce the raw sync rate rather more=2E > >- Jonathan Morton > > >------------------------------------------------------------------------ > >_______________________________________________ >Bloat mailing list >Bloat@lists=2Ebufferbloat=2Enet >https://lists=2Ebufferbloat=2Enet/listinfo/bloat --=20 Sent from my Android device with K-9 Mail=2E Please excuse my brevity=2E