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From: Eric Dumazet <eric.dumazet@gmail.com>
To: Dave Taht <dave.taht@gmail.com>
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Date: Wed, 08 Jun 2011 14:56:13 +0200
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Cc: bloat <bloat@lists.bufferbloat.net>
Subject: Re: [Bloat] Notes about hacking on AQMs
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Le mercredi 08 juin 2011 à 06:12 -0600, Dave Taht a écrit :

> SFQ is the second most commonly used qdisc, but doesn't balance in
> ways ESFQ could.
> 
> ESFQ really looked like a winner and I'm sorry it never made the
> mainline kernel.

Hmm, since 2007 SFQ has all ESFQ provided, if you use a flow classifier,
you can exactly match your needs.

[ SFQ uses an internal flow classifer on
src,dst,proto,proto-src,proto-dst ]

Say you want to make something only about dst addresses :

tc filter add ... flow hash \
  	keys dst divisor 1024

With recent SFQ, you can play with a divisor in [256 .. 65536]


Refs : 

http://lwn.net/Articles/236200/

http://www.nuclearcat.com/mediawiki/index.php/Linux_iproute2