The HTB qdisc has a compile time option, HTB_HYSTERESIS, that trades accuracy of traffic classification for CPU time. These patches change hysteresis to be a runtime option under the control of "tc".
The effects of HYSTERESIS on HTB's accuracy are significant (see chapter 7, section 7.3.1, pp 69-70 in Jesper Brouer's thesis: http://www.adsl-optimizer.dk/thesis/ ), whereas HTB's CPU usage on modern machines using broadband links is minimal. Currently HYSTERESIS is on by default, and requires a kernel re-compile to change. Altering it to be a runtime option will make life easier for the bulk of its users. Further documentation on the patch and its usage can be found here: http://www.stuart.id.au/russell/files/tc/tc-atm This is a combined effort of Jesper Brouer and Russell Stuart, to get these patches into the upstream kernel. Let the discussion start about what we need to change to get this upstream? We see this as a feature enhancement, as such hope that it can be queued in davem's net-2.6.18.git tree. -- Regards Russell Stuart and Jesper Brouer _______________________________________________ LARTC mailing list LARTC@mailman.ds9a.nl http://mailman.ds9a.nl/cgi-bin/mailman/listinfo/lartc
