<div dir="ltr">I should note that I think the ER-X is running out of CPU at times in this configuration, so that may contribute to the weirdness somewhat.</div><br><div class="gmail_quote"><div dir="ltr">On Tue, 24 Jul 2018 at 20:05 Tristan Seligmann <<a href="mailto:mithrandi@mithrandi.net">mithrandi@mithrandi.net</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Here's my results from South Africa. Ping test while running the <a href="http://fast.com" target="_blank">fast.com</a> test, and the tcp_ndown test, running Cake on an EdgeRouter X. I get 140 / 140 Mbps on the <a href="http://fast.com" target="_blank">fast.com</a> test with 1ms unloaded and 6ms loaded.<div><br></div><div>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.</div></div><div dir="ltr"><div><br><br><div class="gmail_quote"><div dir="ltr">On Tue, 24 Jul 2018 at 17:19 Dave Taht <<a href="mailto:dave.taht@gmail.com" target="_blank">dave.taht@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">cdfs help. I also try to encourage sending the flent.gz files too. :)<div><br></div><div>Outbound, to 99% or more of the rate, *with perfect framing* looks great so far, 'cept on crappy cablemodems.</div><div><br></div><div>I am concerned about recommending values as high as 98% for inbound shaping. We are engineering to</div><div>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.</div><div><br></div><div>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</div><div>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...</div><div><br></div><div>try a: </div><div><br></div><div>flent -H <a href="http://flent-london.bufferbloat.net" target="_blank">flent-london.bufferbloat.net</a> -s .02 --te=download_streams=32 -t '98%' tcp_ndown</div><div><br></div><div>with htb+fq_codel and cake to see that spike more clearly. </div><div><br></div></div><br><div class="gmail_quote"><div dir="ltr">On Tue, Jul 24, 2018 at 7:54 AM Kevin Darbyshire-Bryant <<a href="mailto:kevin@darbyshire-bryant.me.uk" target="_blank">kevin@darbyshire-bryant.me.uk</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div style="word-wrap:break-word;line-break:after-white-space"><br><br><blockquote type="cite">On 24 Jul 2018, at 14:51, Dave Taht <<a href="mailto:dave.taht@gmail.com" target="_blank">dave.taht@gmail.com</a>> wrote:<br><br>Now that you can join the party, I note there IS a flent server in england with irtt on it.<br><br>flent-<a href="http://london.bufferbloat.net" target="_blank">london.bufferbloat.net</a><br></blockquote><br><div>Ok, well if you’re desperately interested….. :-)</div><div><br></div><div>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 :-)</div><div><br></div><div>The upstream barely registers</div><div><br></div><div># tc -s qdisc show dev ifb4eth0</div>qdisc cake 801a: root refcnt 2 bandwidth 78400Kbit diffserv3 dual-dsthost nat ingress split-gso rtt 100.0ms ptm overhead 26 <div><br></div><div><br></div><div><img id="m_7950518711889020187m_4534269383927689852m_1210430627799940199523F4C5A-A9D2-4A26-9863-312F7FD24527"></div></div></blockquote></div><br clear="all"><div><br></div>-- <br><div dir="ltr" class="m_7950518711889020187m_4534269383927689852gmail_signature" data-smartmail="gmail_signature"><br>Dave Täht<br>CEO, TekLibre, LLC<br><a href="http://www.teklibre.com" target="_blank">http://www.teklibre.com</a><br>Tel: 1-669-226-2619</div>
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