On Sat, Jun 30, 2018 at 9:46 AM Pete Heist wrote: > > On Jun 30, 2018, at 8:26 AM, Jonas Mårtensson > wrote: > >> >> I played around with flent a bit, here are some example plots: > > https://dl.dropbox.com/s/facariwkp5x5dh1/flent.zip?dl=1 > > The short spikes are not seen with flent so I'm led to believe these are > just a result of running the "Hi-Res" dslreports test in a browser. In the > flent rrul test, up to about 10 ms induced latency can be seen during the > "powerboost" phase but after that it is almost zero. I'm curious about how > this is implemented on the ISP side. If anything, sqm seems to induce a bit > more latency during the "steady-state" phase. > > > You may also want to try running flent with --socket-stats and making a > tcp_rtt plot. You should see a significant difference in TCP RTT between > sfq and anything that uses CoDel. > In case anyone is curious I tried this and the tcp rtt plot looks very similar to the ping rtt plot, i.e. the latencies are the same.