Pete Heist <petehe...@gmail.com> writes: > http://www.drhleny.cz/bufferbloat/cake/round4/ > > Round 4 Tarball: http://www.drhleny.cz/bufferbloat/cake/round4.tgz > > *** Notes/Analysis *** > > * I took the average satellite Internet latency of 638ms > (https://en.wikipedia.org/wiki/Satellite_Internet_access) and tried 20/20mbit > 320ms delay each direction. So here we have 20mbit symmetric Internet with > Cake > running on both the CPE and satellite- common config! I’m sorry we don’t have > Tooway 6/22mbit anymore for a real test, which was also here in desperation at > the house at some point. > > * Since I left the default rtt setting for most tests, these tests are an > exploration of what problems that can cause. I enjoy failed experiments though > (I’m looking at you penicillin). Here we can see that as we increase Cake’s > rtt > setting, total bandwidth improves, generally: > > http://www.drhleny.cz/bufferbloat/cake/round4/cake_rtt_200ms_rrulbe_eg_cake_18.0mbit/index.html > (22.77mbit) > http://www.drhleny.cz/bufferbloat/cake/round4/cake_rtt_400ms_rrulbe_eg_cake_18.0mbit/index.html > (26.17mbit) > http://www.drhleny.cz/bufferbloat/cake/round4/cake_rtt_600ms_rrulbe_eg_cake_18.0mbit/index.html > (25.99mbit) > http://www.drhleny.cz/bufferbloat/cake/round4/cake_rtt_800ms_rrulbe_eg_cake_18.0mbit/index.html > (25.96mbit) > http://www.drhleny.cz/bufferbloat/cake/round4/cake_rtt_1000ms_rrulbe_eg_cake_18.0mbit/index.html > (29.04mbit) > > * Cool. In this case, increasing rtt actually _improves_ host fairness, as > opposed to what we see with Ethernet around rtt 1ms, although TCP RTT suffers:
Hmm. > > http://www.drhleny.cz/bufferbloat/cake/round4/hostiso_cake_200ms_eg_cake_src_cake_dst_18.0mbit/index.html > (1.83) > http://www.drhleny.cz/bufferbloat/cake/round4/hostiso_cake_400ms_eg_cake_src_cake_dst_18.0mbit/index.html > (1.64) > http://www.drhleny.cz/bufferbloat/cake/round4/hostiso_cake_600ms_eg_cake_src_cake_dst_18.0mbit/index.html > (1.57) > http://www.drhleny.cz/bufferbloat/cake/round4/hostiso_cake_800ms_eg_cake_src_cake_dst_18.0mbit/index.html > (1.45) > http://www.drhleny.cz/bufferbloat/cake/round4/hostiso_cake_1000ms_eg_cake_src_cake_dst_18.0mbit/index.html > (1.06) > > * Sorry for the delay and not testing much in the last few days. R.I.P. our > 16yo > European housecat who left us yesterday. I really liked that cat. I’ve enjoyed > looking at some of George’s results meanwhile... :( I used to have a cat, 'cindi clawford'. Been travelling too much to ever settle down again, it seems. > > *** Round 5 Plans > > * If I do another high RTT test, make rtt 1000ms default and try even higher > > * From Dave: tcp bbr, cdg, reno? dctcp would be weirdly interesting. > > * From Dave: slot 4ms 4ms bytes 10k 16 > > * If I get time I could change flenter to do asymmetric bandwidth tests and go > back to Dave’s four box config with ingress cake, which would probably be a > more > common config. All depends on time available… Well, let's see what happens on netdev. I took a few steps towards ripping out blue for comparison the other day. > > > _______________________________________________ > Cake mailing list > Cake@lists.bufferbloat.net > https://lists.bufferbloat.net/listinfo/cake _______________________________________________ Cake mailing list Cake@lists.bufferbloat.net https://lists.bufferbloat.net/listinfo/cake