From: "Toke Høiland-Jørgensen" <toke@toke.dk>
To: John Klimek <jklimek@gmail.com>
Cc: bloat@lists.bufferbloat.net
Subject: Re: [Bloat] Difference between codel and fq_codel?
Date: Wed, 03 Feb 2016 21:33:27 +0100 [thread overview]
Message-ID: <878u31r0tk.fsf@alrua-karlstad.karlstad.toke.dk> (raw)
In-Reply-To: <E0206F34-5540-4D33-A4AB-4B3A765D0B4D@gmail.com> (John Klimek's message of "Wed, 3 Feb 2016 14:22:53 -0500")
John Klimek <jklimek@gmail.com> writes:
> I'm currently using pfaense which only supports codel and not
> fq_codel. Is there a big difference between them? Is it worth looking
> into using a different router?
Yes, and quite possibly. :)
Basically, Codel drops packets to try to keep queues small. This works
reasonably well. However, what FQ-CoDel adds is flow isolation and
priority for sparse flows, which is what in most cases gets rid of
almost all of the added latency under load.
For a (much) longer version of the above, see this:
http://www.sciencedirect.com/science/article/pii/S1389128615002479 -- In
particular, figure 2 shows the performance of a bunch of different
algorithms, including CoDel and FQ-CoDel :)
-Toke
prev parent reply other threads:[~2016-02-03 20:33 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-03 19:22 John Klimek
2016-02-03 20:09 ` Rick Jones
2016-04-08 19:36 ` Jonathan Morton
2016-04-08 19:37 ` Jim Gettys
2016-02-03 20:33 ` Toke Høiland-Jørgensen [this message]
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