[Codel] [Cake] hard limit codel

Kathleen Nichols nichols at pollere.com
Thu Apr 16 10:47:41 EDT 2015

You are taking this much too seriously. This was written in order to
write a
paper. There is no study of the "problem" just a presentation of the

They probably even submitted a patent.

On 4/16/15 5:00 AM, Jonathan Morton wrote:
>> On 16 Apr, 2015, at 14:50, Toke Høiland-Jørgensen <toke at toke.dk>
>> wrote:
>> I'll add, though, that I have seen the sentiment expressed here
>> ("we need to limit the max delay of CoDel") in other contexts. And,
>> well, delay spikes *is* a problem!
> Yes, they are.
> But in general AQM can’t be used to solve that problem without also
> suffering poor throughput; combining AQM with FQ *does* solve it.
> Just like FQ is unfair to single flows competing against a swarm, but
> classifying the swarm traffic into a separate traffic class fixes
> that problem too.
> Which of course is why cake uses AQM, FQ *and* Diffserv, all at
> once.
> The linked paper didn’t measure HLC against fq_codel, even though
> they mention fq_codel.  That’s a major shortcoming.
> - Jonathan Morton
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