lkml.org 
[lkml]   [2008]   [Feb]   [18]   [last100]   RSS Feed
Views: [more markup]  [less markup]  [headers]  [forward] 
 
Messages in this thread
/
DateSun, 17 Feb 2008 23:28:29 -0800 (PST)
SubjectRe: [PATCH 2.6.24 1/1] sch_htb: fix "too many events" situation
FromDavid 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.


\
 
 \ /
  Last update: 2008-02-18 08:31    [from the cache]
©2003-2008