From mboxrd@z Thu Jan 1 00:00:00 1970 From: "John A. Sullivan III" Subject: Re: [WARNING - VERY LONG] A sysadmin's understanding of HFSC and IFB Date: Wed, 14 Dec 2011 00:58:11 -0500 Message-ID: <1323842291.8451.176.camel@denise.theartistscloset.com> References: <1323415051.3159.25.camel@denise.theartistscloset.com> <1323417599.2529.18.camel@edumazet-laptop> <1323817279.8451.7.camel@denise.theartistscloset.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: QUOTED-PRINTABLE Cc: netdev@vger.kernel.org To: Eric Dumazet Return-path: Received: from mout.perfora.net ([74.208.4.195]:51683 "EHLO mout.perfora.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750978Ab1LNF6P convert rfc822-to-8bit (ORCPT ); Wed, 14 Dec 2011 00:58:15 -0500 In-Reply-To: <1323817279.8451.7.camel@denise.theartistscloset.com> Sender: netdev-owner@vger.kernel.org List-ID: On Tue, 2011-12-13 at 18:01 -0500, John A. Sullivan III wrote: > On Fri, 2011-12-09 at 08:59 +0100, Eric Dumazet wrote: > > Le vendredi 09 d=C3=A9cembre 2011 =C3=A0 02:17 -0500, John A. Sulli= van III a > > =C3=A9crit : > > > Hello, all. I've been trying to summarize my last week's worth o= f > > > research into HFSC and IFB. Being neither a developer nor a > > > mathematician, I found most of the existing documentation dauntin= g and > > > am truly grateful for the help I received on this list to underst= and the > > > technologies. > > >=20 > > > I do not currently have a blog to post this research and so was t= hinking > > > of posting it to this list so that it could be archived and searc= hable > > > for other poor sysadmin types like me to save them the days of > > > struggling to get their practical heads around the concepts. > > >=20 > > > However, since this is probably a 15 page or so document, I reali= zed > > > this could be quite rude to those on dial up or metered connectio= ns. > > > Would it be appropriate to post my summary here? Thanks - John > > >=20 > >=20 > > Please post here, thats definitely a good idea. > >=20 > > I am pretty sure your contribution could serve to add a page to=20 > >=20 > > http://www.linuxfoundation.org/collaborate/workgroups/networking/gr= oup > >=20 > > I believe we lack documentation. A lot. > > OK - it's almost ready. The only problem I know if is that, when I d= o > the math based upon my explanation, I sometimes violate an rt curve w= hen > I should not. I posed that in an email to the list entitled "An erro= r > in my HFSC sysadmin documentation". If anyone can figure out where m= y > error is, I will gladly change the documentation. Here's what I have= =2E > The graphics except the ASCII art are obviously missing. All > corrections and suggestions very gratefully accepted - John >=20 I realize I was using an incorrect definition of backlogged (needing more bandwidth than the guaranteed bandwidth) and have corrected (havin= g a packet in queue) - John