[Bloat] Notes about hacking on AQMs

[Eric Dumazet]

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