[e2e] Codel and Wireless

Detlef Bosau detlef.bosau at web.de
Wed Dec 4 04:11:35 PST 2013

Am 03.12.2013 22:11, schrieb Daniel Havey:
> CoDel parameters are interval and target.  

Particularly "interval" is a yet to be discovered fundamental physical
constant, the Nobel price and the Turing award for which are still pending.

(Less pathetically spoken: It is a constant discovered by three or four
experiments and now, it is "the" fundamental constant which is valid in
the whole universe. When I did so in papers, these papers were rejected,
without exception. What are we pursuing? Science or gambling?)
> If the queue drains before the interval then there shouldn't be any drops. 

Yes, Daniel. I know the code.

And when I claim this is nonsense, then I'm first ready to take flames
and send, you can be assured that I read the code and the comments and
papers VERY MUCH more than once.

And even in this very moment, I have the pseudocode visible on the other
screen. And actually, the "sojourn time" is a qeue sojourn time and it
is calculated from time stamps, where the "clock" is read when the
packet is enqueued and dequeued.

With respect to queueing systems: CoDel measures queueing time, CoDel
doesn't meaure sojourn time. (:= Queueing Time + Service Time as you
remember from lectures.)

Detlef Bosau
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