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

[Jonathan Morton]

> On 30 Nov, 2018, at 12:32 pm, Luca Muscariello <luca.muscariello at gmail.com> wrote:
> 
> Two last comments: one should always used fluid approximation with care, because they are approximations, 
> the real model is more complex. Nobody considers that the RTT varies during the connection lifetime and that ACK can be delayed.
> So CWD increases in a non simple way.

If I can restate that in a more concrete way: the queue may not drain at a smooth, constant rate.  There are several real-world link technologies which exhibit this behaviour - wifi and DOCSIS come to mind, not to mention 3G/4G with variable signal strength.

 - Jonathan Morton