From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-we0-x22c.google.com (mail-we0-x22c.google.com [IPv6:2a00:1450:400c:c03::22c]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by huchra.bufferbloat.net (Postfix) with ESMTPS id 85A9D21F18C for ; Sun, 29 Dec 2013 05:50:04 -0800 (PST) Received: by mail-we0-f172.google.com with SMTP id p61so9556640wes.31 for ; Sun, 29 Dec 2013 05:50:02 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:date:message-id:subject:from:to:content-type :content-transfer-encoding; bh=SE6P4MXx6BFCwc+Jw9jGT8wlYwDkvbocKXCsIWhBx8g=; b=Zi1ZDK9QG4uOzxHgF2wYRR0lRzHJ2vAp1E1nBA8QTUr0GktbxNyRkeS5UJO9yhVSvw 0+TiJScLh2N6dJnOD85DQz2dRr8FRLvsKSvPlVUqHIyfQtUWLXF8jxED1oBBfLKwn4nm G89uUcSYXs6hNGKqgeA9L/CDiI4bCOsSXhCUIvizjTBz4GxIB2Dr/eLCbz/oAkD3dqzd pHHLYp1YfXbEmWI1bWmVTF5b36yxU00b39G249Ap9WjNyPCVgJbAHBHl+Emd/bltQfbx 2+4Y4ADNazQ+YtEeBFQsZ0Mt/DNmxlJ1t3i+RF433cB0rRn5fNR4m8ETLiMv3pBi6lMt 3/Jw== MIME-Version: 1.0 X-Received: by 10.180.10.3 with SMTP id e3mr23727373wib.46.1388325002667; Sun, 29 Dec 2013 05:50:02 -0800 (PST) Received: by 10.217.123.69 with HTTP; Sun, 29 Dec 2013 05:50:02 -0800 (PST) Date: Sun, 29 Dec 2013 05:50:02 -0800 Message-ID: From: Dave Taht To: "cerowrt-devel@lists.bufferbloat.net" Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Subject: [Cerowrt-devel] shaperprobe tests 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: Sun, 29 Dec 2013 13:50:05 -0000 I am pleased to see mlabs has a server up for collections. Given that there was other traffic on this link the results aren't too wildly inaccurate. I do find it amusing that it doesn't detect a shaper on any of my tests so = far. Recently I did a whole bunch of interesting traces with stuart cheshire and you CAN detect a clear pattern for the inverse sqrt of codel on a nearly idle link. I haven't looked at the guts of shaperprobe since I saw it at gatech, but perhaps it's possible to leverage it further in cero than has ever been done before and make it more accurate. I sure hope that nobody's writing papers on the results today... I would be very interested on other people's results with and without sqm enabled using shaperprobe. Current code and binaries for major operating systems are at: http://www.measurementlab.net/tools/shaperprobe The one that is in cerowrt is 3 years out of date. Fixing that, but for now running code from my x86 box: I set my connection to 800 down and 220 up with nfq_codel. d@k1:~/Downloads/shaperprobe$ ./prober DiffProbe release. January 2012. Shaper Detection Module. Connected to server XX.YY.ZZ.QQ Estimating capacity: Upstream: 138 Kbps. Downstream: 750 Kbps. The measurement will last for about 2.5 minutes. Please wait. Checking for traffic shapers: Upstream: No shaper detected. Median received rate: 112 Kbps. Downstream: No shaper detected. Median received rate: 746 Kbps. For more information, visit: http://www.cc.gatech.edu/~partha/diffprobe Then I did fq_codel for 25Mbit down, 4up d@k1:~/Downloads/shaperprobe$ ./prober DiffProbe release. January 2012. Shaper Detection Module. Connected to server XX.YY.ZZ.QQ Estimating capacity: Upstream: 3548 Kbps. Downstream: 19125 Kbps. The measurement will last for about 2.5 minutes. Please wait. Checking for traffic shapers: Upstream: No shaper detected. Median received rate: 3472 Kbps. Downstream: No shaper detected. Median received rate: 18741 Kbps. Then, for giggles, on an unshaped cable modem (which is roughly 25 down and 5 up with powerboost enabled, I think....) Estimating capacity: Upstream: 4794 Kbps. Downstream: 96663 Kbps. # WTF? The measurement will last for about 3.0 minutes. Please wait. Checking for traffic shapers: Upstream: No shaper detected. Median received rate: 4666 Kbps. Downstream: No shaper detected. Median received rate: 28186 Kbps. # powerboost probably It's choosing different servers for each of these tests so I would expect that to be part of the issues, too. --=20 Dave T=E4ht Fixing bufferbloat with cerowrt: http://www.teklibre.com/cerowrt/subscribe.= html