[Bloat] [Bug 1436945] Re: devel: consider fq_codel as the default qdisc for networking

Bless, Roland (TM) roland.bless at kit.edu
Wed Jun 6 03:44:35 EDT 2018


Hi,

Am 05.06.2018 um 20:34 schrieb Sebastian Moeller:
> 	The rationale for that decision still is valid, at low bandwidth every opportunity to send a packet matters and every packet being transferred will increase the queued packets delay by its serialization delay. The question IMHO is more is 4 Mbps a reasonable threshold to disable ECN or not.

ECN should be enabled irrespective of the current bottleneck bandwidth.
I don't see any relationship between serialization delay with ECN.
Congestion control is about determining the right amount of inflight
data. ECN just provides an explicit congestion signal as feedback
and helps anyway. The main problem is IMHO that most routers have
no AQM in place in order to set the CE codepoint appropriately...

Regards,
 Roland



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