From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jesper Dangaard Brouer Subject: Re: QoS weirdness : HTB accuracy Date: Wed, 7 Jul 2010 12:50:59 +0000 (UTC) Message-ID: References: <067c83163988908ef546d7ff7f560a17@localhost> <4BF32BB0.7010700@redfish-solutions.com> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Return-path: Sender: netfilter-owner@vger.kernel.org List-ID: Content-Type: text/plain; charset="us-ascii" To: netfilter@vger.kernel.org Julien Vehent linuxwall.info> writes: > On Tue, 18 May 2010 18:07:12 -0600, "Philip A. Prindeville" > redfish-solutions.com> wrote: > > > > Sorry for the late response: could this be an "aliasing" issue caused > > by sampling intervals (granularity)? > > > > -Philip > > 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 have checked the HTB kernel code, and my understanding is that, you must set it on both the leaf and the root, for the shaping to be correct. It is the expected behavior that small packets cause a significant reduction in the available bandwidth on the ATM link. See my answer to your original post. -- Med venlig hilsen / Best regards Jesper Brouer ComX Networks A/S Linux Network Kernel Developer Cand. Scient Datalog / MSc.CS Author of http://adsl-optimizer.dk LinkedIn: http://www.linkedin.com/in/brouer