Here's my results from South Africa. Ping test while running the fast.com test, and the tcp_ndown test, running Cake on an EdgeRouter X. I get 140 / 140 Mbps on the fast.com test with 1ms unloaded and 6ms loaded. Not sure why throughput is so low, but I often see something like this on artificial bandwidth tests; it peaks close to 200, but then drops back down toward the end of the test. I'm shaping to 200 / 200 Mbps with cake which is my sold connection speed; the actual link is 1 Gbps active ethernet over fibre with the ISP limiting to about 210-220 Mbps. On Tue, 24 Jul 2018 at 17:19 Dave Taht wrote: > cdfs help. I also try to encourage sending the flent.gz files too. :) > > Outbound, to 99% or more of the rate, *with perfect framing* looks great > so far, 'cept on crappy cablemodems. > > I am concerned about recommending values as high as 98% for inbound > shaping. We are engineering to > the test here (2? 3 flows? on a very short rtt), and need to leave *some* > headroom for multiple flows to enter in slow start and get kicked out of it. > > I'll buy that the old 85% figure made sense in the sub 20Mbit era, and > that we only need enough headroom to allow X flows to enter based on the > characteristics of the link and typical traffic - 15 new flows per second > * per active user/10 ? and cake's response to slow start is more > agressive... > > try a: > > flent -H flent-london.bufferbloat.net -s .02 --te=download_streams=32 -t > '98%' tcp_ndown > > with htb+fq_codel and cake to see that spike more clearly. > > > On Tue, Jul 24, 2018 at 7:54 AM Kevin Darbyshire-Bryant < > kevin@darbyshire-bryant.me.uk> wrote: > >> >> >> On 24 Jul 2018, at 14:51, Dave Taht wrote: >> >> Now that you can join the party, I note there IS a flent server in >> england with irtt on it. >> >> flent-london.bufferbloat.net >> >> >> Ok, well if you’re desperately interested….. :-) >> >> Plot I did running to the london server, one shaped at 99% downstream, >> the other at 98%…. and I’ve decided to stick at 98% as a result - plot is a >> little bit hard to distinguish but I’d say there’s around 8ms avg less >> latency-ish between the two. And an order of magnitude between using >> london v fremont :-) >> >> The upstream barely registers >> >> # tc -s qdisc show dev ifb4eth0 >> qdisc cake 801a: root refcnt 2 bandwidth 78400Kbit diffserv3 dual-dsthost >> nat ingress split-gso rtt 100.0ms ptm overhead 26 >> >> >> > > -- > > Dave Täht > CEO, TekLibre, LLC > http://www.teklibre.com > Tel: 1-669-226-2619 > _______________________________________________ > Cake mailing list > Cake@lists.bufferbloat.net > https://lists.bufferbloat.net/listinfo/cake >