<div dir="ltr"><div>Here's someone's monitoring setup with high frequency pings: <a href="https://snapshot.raintank.io/dashboard/snapshot/eL3CqijxCvIn0yJz05QQkg47OTNlk05A?orgId=2">https://snapshot.raintank.io/dashboard/snapshot/eL3CqijxCvIn0yJz05QQkg47OTNlk05A?orgId=2</a></div><div>Looks better than the 50-115ms reported. <br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, May 17, 2021 at 8:34 AM Neal Cardwell <<a href="mailto:ncardwell@google.com">ncardwell@google.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">On Sat, May 15, 2021 at 7:00 PM Matt Mathis via Bloat<br>
<<a href="mailto:bloat@lists.bufferbloat.net" target="_blank">bloat@lists.bufferbloat.net</a>> wrote:<br>
><br>
> I don't understand: starlink doesn't terminate the TCP connection,<br>
> does it? Or are you referring to YT's BBR adequately addressing<br>
> Starlinks variable RTT? "Adequately" is probably the operative word.<br>
> It is not too hard to imagine what goes wrong with BBR if the actual<br>
> path length varies, and on an underloaded network, you may not be able<br>
> to even detect the symptoms.<br>
<br>
On that note, the article mentions:<br>
"Starlink itself measures ping times for Counter-Strike: Go and<br>
Fortnite in its app, and I rarely saw those numbers dip below 50ms,<br>
mostly hovering around 85-115ms."<br>
<br>
If the range 50ms to 115ms is representative of two-way propagation<br>
delays on their network, then it sounds like BBR can probably perform<br>
reasonably well in that environment. The algorithm is designed to<br>
tolerate factor-of-two variations in RTT and still maintain full<br>
utilization, if there is reasonable buffering.<br>
<br>
neal<br>
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</blockquote></div>