From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by huchra.bufferbloat.net (Postfix) with ESMTPS id CF85621F35E for ; Thu, 11 Jun 2015 23:45:57 -0700 (PDT) Received: from int-mx11.intmail.prod.int.phx2.redhat.com (int-mx11.intmail.prod.int.phx2.redhat.com [10.5.11.24]) by mx1.redhat.com (Postfix) with ESMTPS id 8631B3674BC; Fri, 12 Jun 2015 06:45:56 +0000 (UTC) Received: from localhost (ovpn-116-30.ams2.redhat.com [10.36.116.30]) by int-mx11.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id t5C6jqQO021068; Fri, 12 Jun 2015 02:45:53 -0400 Date: Fri, 12 Jun 2015 08:45:51 +0200 From: Jesper Dangaard Brouer To: Sebastian Moeller Message-ID: <20150612084551.3fdafac4@redhat.com> In-Reply-To: <93F98697-31A7-4AFB-978A-C32F398C220A@gmx.de> References: <5572F7E0.3060602@darbyshire-bryant.me.uk> <20150611132434.564c382c@redhat.com> <93F98697-31A7-4AFB-978A-C32F398C220A@gmx.de> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 2.68 on 10.5.11.24 Cc: Jonathan Morton , Van Jacobson , 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: Fri, 12 Jun 2015 06:46:26 -0000 On Thu, 11 Jun 2015 23:03:18 +0200 Sebastian Moeller wrot= e: > On Jun 11, 2015, at 16:14 , Tristan Seligmann w= rote: >=20 > > On Thu, 11 Jun 2015 at 13:58 Sebastian Moeller wrote: > > > > I sort of did, but it takes a relative long time to gather data > > (typically around 3 hours) plus 15 minutes for the analysis. I am > > happy to share this with interested parties... > >=20 > > I would definitely be interested in this for myself. >=20 > Sure I will send it your way this weekend (need to do a tiny > bit of clean-up and actually want to put it into git and possibly > git-hub). It essentially is a shell script that runs ping and a > matlab/octave script that does attempts the ATM detection, so far it > worked well, but it is by no way automatic (yet)=E2=80=A6. Please also send it my way. (But I don't have time to look at it before *after* netfilter workshop[1]) One hint when detecting this, use the *minimum* observed latency/ping for a given packet size, as jitter/other-traffic can only increase the latency, but cannot lower it. (This is an idea that I picked up from Van Jacobsson). --=20 Best regards, Jesper Dangaard Brouer MSc.CS, Sr. Network Kernel Developer at Red Hat Author of http://www.iptv-analyzer.org LinkedIn: http://www.linkedin.com/in/brouer [1] http://workshop.netfilter.org/2015/