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. -- Dave Täht Fixing bufferbloat with cerowrt: http://www.teklibre.com/cerowrt/subscribe.html _______________________________________________ Cerowrt-devel mailing list Cerowrt-devel@lists.bufferbloat.net https://lists.bufferbloat.net/listinfo/cerowrt-devel
