From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-ia0-f171.google.com (mail-ia0-f171.google.com [209.85.210.171]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority" (verified OK)) by huchra.bufferbloat.net (Postfix) with ESMTPS id 84BA021F16D; Mon, 26 Nov 2012 00:32:35 -0800 (PST) Received: by mail-ia0-f171.google.com with SMTP id b35so6696991iac.16 for ; Mon, 26 Nov 2012 00:32:34 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type:content-transfer-encoding; bh=6KthP7SQ3/0phelbMuPMoJx+FfcR3MTTDpfGdAykwc0=; b=mKU00UjcpMsPqOIorHLEi06xkh4hykqmmkANFN5IIyYmQMMf6+75LlfnbX24zcnnL7 GJ4qqGxR8JYUtMS2fuUJcsVCAo/soHxcl1JR85efg/FxVb7yaGwmUmhWNqEFWJXiA6fA /4FcPv0kh0eg+nqj9ujvzo1HY1yHTHGwVbQ+IENz1Kn0EjLWv5sMJigHwiWRIpFuM/vv OTPOpuQ8ISWn0JokZm6Iqt2Eimm4RlyU6n1WiqQoMZjg8fmkMs23fQscj3gVAOGW7R7G /cy6aC1Rv0E3xks3NiZAgKl39rnuaJUb+ReSDRdeLqtf0TbLGqThHJFLUeucDbGntFkX 48sA== MIME-Version: 1.0 Received: by 10.50.171.4 with SMTP id aq4mr13063684igc.68.1353918754797; Mon, 26 Nov 2012 00:32:34 -0800 (PST) Received: by 10.64.135.39 with HTTP; Mon, 26 Nov 2012 00:32:34 -0800 (PST) In-Reply-To: <20121125232034.GF24680@merlins.org> References: <20121125232034.GF24680@merlins.org> Date: Mon, 26 Nov 2012 09:32:34 +0100 Message-ID: From: Dave Taht To: Marc MERLIN Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Cc: cerowrt-users@lists.bufferbloat.net, cerowrt-devel@lists.bufferbloat.net Subject: Re: [Cerowrt-devel] [Cerowrt-users] QOS settings vs speedboost and random bandwidth X-BeenThere: cerowrt-devel@lists.bufferbloat.net X-Mailman-Version: 2.1.13 Precedence: list List-Id: Development issues regarding the cerowrt test router project List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 26 Nov 2012 08:32:36 -0000 there are not presently a lot of cerowrt-users members, so I'm cc-ing cerowrt-devel. On Mon, Nov 26, 2012 at 12:20 AM, Marc MERLIN wrote: > I'm setting up QOS as explained in the FAQ > http://www.bufferbloat.net/projects/cerowrt/wiki/FAQ > > Not surprisingly > speednest.net gives me 33Mbit/7.65Mbit while dslreports.com/speedtest giv= es > me a meager 16.2Mbit/2.5Mbit (for a line that's supposed to be 22Mbit/5Mb= it). Yes, you get a boost for about 10 seconds. > I understand the queuing and that if I put too high a number, I'll fill > queues and end up with bad latency. yep. > > At the same time, am I correct that if I put numbers that are lower than > what I can really get when the line doesn't suck, I'll cap myself to thos= e > numbers (here 16.2Mbit instead of 22Mbit or so)? yep. > > Is it also possible for linux/cerowrt to dynmically detect the queuing/de= lay > in my cable modem and dynamically adjust the QOS values to limit bufferin= g > on the comcast side without throttling me down to lower than what the lin= e > can do at any given time? Nope. The right answer is to not have to rate shape in the router, but to move the fq_codel algorithm into the cable modem, OR to have the cable modem exert flow control like ADSL modems do. Then have the smarter device (the router) then do smarter queuing. There are other dynamic bandwidth effects on a cable network that result in more widely varying backend bandwidth. A little birdie tells me that the cable modem guys are on this... speedboost is a good idea but the only way to not lose it is to move the smarts around. That said, it does seem possible to develop a speedboost emulator on the router that would give you most of the benefit. > > I'm also a bit concerned of what happens when comcasts ups my bandwidth > without telling me (they do that sometimes) and me never finding out if I > have a static QOS value in cerowrt. > > Can others advise? > > Thanks, > Marc > -- > "A mouse is a device used to point at the xterm you want to type in" - A.= S.R. > Microsoft is to operating systems .... > .... what McDonalds is to gourmet c= ooking > Home page: http://marc.merlins.org/ > _______________________________________________ > Cerowrt-users mailing list > Cerowrt-users@lists.bufferbloat.net > https://lists.bufferbloat.net/listinfo/cerowrt-users --=20 Dave T=E4ht Fixing bufferbloat with cerowrt: http://www.teklibre.com/cerowrt/subscribe.= html