[Bloat] when does the CoDel part of fq_codel help in the real world?

[Michael Welzl]

Just a small clarification:


>> To me the switch to head dropping essentially killed the tail loss RTO
>> problem, eliminated most of the need for ecn.
> 
> I doubt that: TCP will need to retransmit that packet at the head, and that takes an RTT - all the packets after it will need to wait in the receiver buffer before the application gets them.
> But I don’t have measurements to prove my point, so I’m just hand-waving…

I don’t doubt that this kills the tail loss RTO problem.
I doubt that it eliminates the need for ECN.

Cheers,
Michael

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.bufferbloat.net/pipermail/bloat/attachments/20181127/0ff04bb5/attachment-0002.html>