netdev - Re: [BUG #12364] Re: HTB - very bad precision? HFSC works fine! 2.6.28

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Date:	Mon, 12 Jan 2009 22:01:19 +0200
From:	Denys Fedoryschenko <denys@...p.net.lb>
To:	Jesper Dangaard Brouer <hawk@...u.dk>
Cc:	Patrick McHardy <kaber@...sh.net>, netdev <netdev@...r.kernel.org>,
	bugme-daemon@...zilla.kernel.org
Subject: Re: [BUG #12364] Re: HTB - very bad precision? HFSC works fine!	2.6.28

They are enabled

Router-Dora /config # zcat /proc/config.gz |grep HIGH_RES
CONFIG_HIGH_RES_TIMERS=y
Router-Dora /config # zcat /proc/config.gz |grep HZ
CONFIG_NO_HZ=y


On Monday 12 January 2009 21:58:22 Jesper Dangaard Brouer wrote:
> On Mon, 12 Jan 2009, Denys Fedoryschenko wrote:
> > End of my story:
> > 1000HZ solved issue. HTB and HFSC keeps rate MUCH better.
> > Both looks like perform similar, but because it is real load scenario, i
> > cannot measure which one is better.
>
> If that was you problem, you should consider enabling
> CONFIG_HIGH_RES_TIMERS (and possibly CONFIG_NO_HZ).
>
> Patrick McHardy has at some point made the sched code independent of the
> HZ value, but only when the HIGH_RES_TIMERS are enabled.
>
> Cheers,
>    Jesper Brouer
>
> --
> -------------------------------------------------------------------
> MSc. Master of Computer Science
> Dept. of Computer Science, University of Copenhagen
> Author of http://www.adsl-optimizer.dk
> -------------------------------------------------------------------
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