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From: Jonathan Morton <chromatix99@gmail.com>
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To: Simon Barber <simon@superduper.net>
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Subject: Re: [Bloat] AQM and PPP on Linux
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> On 28 Jul, 2015, at 17:31, Simon Barber <simon@superduper.net> wrote:
>=20
> The issue is that Codel tries to keep the delay low, and will start =
dropping when sojourn time grows above 5ms for 100ms. For longer RTT =
links more delay is necessary to avoid underutilizing the link.

I=E2=80=99m pretty sure we=E2=80=99ve had this discussion before, =
several times.

Codel works pretty well, with an interval of 100ms, when the actual RTT =
is between about 10ms and 1000ms.  That accounts for 99.9% of the =
practical paths you=E2=80=99ll see on the Internet.

If you really are concerned about long-RTT paths, then you can increase =
the interval parameter to suit.  This will hurt Codel=E2=80=99s =
performance slightly on very short-RTT paths.

 - Jonathan Morton