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Date: Tue, 27 Nov 2018 14:49:53 +0100 (CET)
From: Mikael Abrahamsson <swmike@swm.pp.se>
To: Luca Muscariello <luca.muscariello@gmail.com>
cc: bloat <bloat@lists.bufferbloat.net>
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Subject: Re: [Bloat] when does the CoDel part of fq_codel help in the real
 world?
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On Tue, 27 Nov 2018, Luca Muscariello wrote:

> If you, Mikael don't want more than 10ms buffer, how do you achieve that?

class class-default
   random-detect 10 ms 2000 ms

That's the only thing available to me on the platforms I have. If you 
would like this improved, please reach out to the Cisco ASR9k BU and tell 
them to implement ECN and PIE (or something even better). They won't do it 
because I say so, it seems. WRED is all they give me.

> You change the behaviour of the source and hope flow isolation is available.

Sorry, I only transport the packets, I don't create them.

> If you just cut the buffer down to 10ms and do nothing else, the only thing
> you get is a short queue and may throw away half of your link capacity.

If i have lots of queue I might instead get customer complaints about high 
latency for their interactive applications.

-- 
Mikael Abrahamsson    email: swmike@swm.pp.se