On Sat, Dec 03, 2016 at 08:03:50AM -0500, Neal Cardwell wrote: > Thanks for the report, Steinar. This is the first report we've had > like this, but it would be interesting to find out what's going on. > > Even if you don't have time to apply the patches Eric mentions, it > would be hugely useful if the next time you have a slow transfer like > that you could post a link to a tcpdump packet capture (headers only > is best, say -s 120). Ideally the trace would capture a whole > connection, so we can see the wscale on the SYN exchange.
I tried reproducing it now. I can't get as far down as 50 Mbit/sec, but it stopped around 100 Mbit/sec, still without any clear bottlenecks. cubic was just as bad, though. I've taken two tcpdumps as requested; I can't reboot this server easily right now, unfortunately. They are: http://storage.sesse.net/bbr.pcap -- ssh+tar+gnupg http://storage.sesse.net/bbr2.pcap -- wget between same hosts /* Steinar */ -- Homepage: https://www.sesse.net/ _______________________________________________ Bloat mailing list Bloat@lists.bufferbloat.net https://lists.bufferbloat.net/listinfo/bloat