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Re: [aqm] CoDel's control law that determines drop frequency

"Bless, Roland (TM)" <roland.bless@kit.edu> Wed, 30 September 2015 12:20 UTC

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To: Toke Høiland-Jørgensen <toke@toke.dk>, Polina Goltsman <polina.goltsman@student.kit.edu>
References: <201311122230.rACMUBmH003536@bagheera.jungle.bt.co.uk> <87wpzfpbd3.fsf@alrua-karlstad.karlstad.toke.dk> <56045CA8.2060103@bobbriscoe.net> <CAPRuP3mmg_-uxmtLUXprCmPyLSUuUA7t2dRZpDs_mwtnTgrSQA@mail.gmail.com> <560BA261.6020206@bobbriscoe.net> <560BA7B9.8020800@student.kit.edu> <877fn8kttv.fsf@toke.dk>
From: "Bless, Roland (TM)" <roland.bless@kit.edu>
Organization: Institute of Telematics, Karlsruhe Institute of Technology
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Date: Wed, 30 Sep 2015 14:20:28 +0200
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Cc: Andrew Mcgregor <andrewmcgr@google.com>, Kathleen Nichols <nichols@pollere.com>, Bob Briscoe <ietf@bobbriscoe.net>, AQM IETF list <aqm@ietf.org>, Van Jacobson <vanj@google.com>
Subject: Re: [aqm] CoDel's control law that determines drop frequency
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Hi,

Am 30.09.2015 um 13:52 schrieb Toke Høiland-Jørgensen:
> Polina Goltsman <polina.goltsman@student.kit.edu> writes:
> 
>>> Early on, Rong Pan showed that it takes CoDel ages to bring high load under
>>> control. I think this linear increase is the reason.
>>
>> Is there a link to this ?
> 
> I have an analysis of transient behaviour in my recent paper (section 6.2):
> http://www.sciencedirect.com/science/article/pii/S1389128615002479
> 
> PIE struggles with this too, BTW...

Thanks for the pointer, but I guess that's a different issue.
If I understood Bob correctly, he was referring to a steady state
situation with many flows (=high load?) in congestion avoidance phase.
But maybe Bob can clarify this...

Regards,
 Roland

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