From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andrew Beverley Subject: Re: QoS weirdness : HTB accuracy Date: Sun, 04 Jul 2010 18:50:07 +0100 Message-ID: <1278265807.1506.86.camel@andybev> References: <067c83163988908ef546d7ff7f560a17@localhost> <4BF32BB0.7010700@redfish-solutions.com> <1276204948.1403.13.camel@andybev> Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit Cc: "Philip A. Prindeville" , Netdev , netfilter To: Julien Vehent Return-path: Received: from earth.simplelists.com ([89.16.184.171]:55407 "EHLO earth.simplelists.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754528Ab0GDRue (ORCPT ); Sun, 4 Jul 2010 13:50:34 -0400 In-Reply-To: <1276204948.1403.13.camel@andybev> Sender: netdev-owner@vger.kernel.org List-ID: > > I was, in fact, an error in my ruleset. I had put the 'linklayer atm' at > > both the branch and leaf levels, so the overhead was computed twice, > > creating those holes in the bandwidth. > > I am seeing similar behaviour with my setup. Am I making the same > mistake? A subset of my rules is as follows: > > > tc qdisc add dev ppp0 root handle 1: htb r2q 1 > > tc class add dev ppp0 parent 1: classid 1:1 htb \ > rate ${DOWNLINK}kbit ceil ${DOWNLINK}kbit \ > overhead $overhead linklayer atm <------- Here > > tc class add dev ppp0 parent 1:1 classid 1:10 htb \ > rate 612kbit ceil 612kbit prio 0 \ > overhead $overhead linklayer atm <------- And here > > tc qdisc add dev ppp0 parent 1:10 handle 4210: \ > sfq perturb 10 limit 50 > > tc filter add dev ppp0 parent 1:0 protocol ip \ > prio 10 handle 10 fw flowid 1:10 I removed the overhead option on the first leaf, and the speeds change to what I expect. However, the rules above are taken straight from the ADSL Optimizer project, which was the source of the original overhead patch for tc. So is the ADSL Optimizer project wrong? Andy