Messages in this thread |  | | | Date | Sun, 17 Feb 2008 23:28:29 -0800 (PST) | | Subject | Re: [PATCH 2.6.24 1/1] sch_htb: fix "too many events" situation | | From | David Miller <> | |
From: Martin Devera <devik@cdi.cz>
Date: Fri, 15 Feb 2008 00:02:56 +0100
> From: Martin Devera <devik@cdi.cz>
>
> HTB is event driven algorithm and part of its work is to apply
> scheduled events at proper times. It tried to defend itself from
> livelock by processing only limited number of events per dequeue.
> Because of faster computers some users already hit this hardcoded
> limit.
> This patch uses loops_per_jiffy variable to limit event processing
> up to single jiffy interval and then delay remainder to other
> jiffy.
>
> Signed-off-by: Martin Devera <devik@cdi.cz>
I think we would be wise to use something other than loops_per_jiffy.
Depending upon the loop calibration method used by a particular
architecture it can me one of many different things.
Some platforms don't even make use of it and thus leave it at it's
default value of "1<<12", so using it as a heuristic here is arbitrary
at best.
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