[Babel-users] [PATCH 2/3] Add ECN support to babel messages

Toke Høiland-Jørgensen toke at toke.dk
Fri Sep 28 10:56:49 BST 2018


Juliusz Chroboczek <jch at irif.fr> writes:

>>>> I think I agree with Juliusz here, I'd prefer Babel stay truthful and
>>>> instead change how fq_codel reacts to it.
>
>>> Yeah, perhaps fq_codel is not tolerant enough of bursts of packets.
>
>> Heh, I'm not sure there's a proper response to a large burst of
>> back-to-back packets that won't suck for all other traffic...
>
> I'm not a specialist, but my uneducated intuition would be that
> fq_codel can be tuned less agressively than plain codel -- the FQ
> element will prevent undue delay for unrelated flows.

Yeah, it will hurt other flows less (or not at all), but that will
impact the intra-flow latency of TCP flows that do build a queue. So
it's a tradeoff...

-Toke



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