Of course, it would help if I posted a link to the screenshots! http://www.teklibre.com/~d/sackoddity/ On 10/11/2011 03:09 PM, David Täht wrote: > I have put up screenshots of tcptrace -G and xplot.org's analysis of my > most recent capture of an ipv6 connection over freebox (wired) from a > debloat-testing kernel here in france (pre 3.1 by a lot) to a 2.6.16 > kernel (the aformentioned netsonar box) in redwood city, ca, both > running tcp cubic, over ipv6. > > at first glance, it looked a lot like a classic bufferbloat trace, with > complete with periodic collapses and cubic increasing the window. > > Then I noticed the sacks. > > I also have a trace taken between the debloat-testing box and a cerowrt > box (running linux 3.04), both running westwood, which shows > considerably less undesirable behavior, and I will repeat that test with > cubic this evening and post additional data tomorrow morning. > -- Dave Täht