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From: Con Kolivas <kernel@kolivas.org>
To: "Martin J. Bligh" <mbligh@aracnet.com>,
       linux-kernel <linux-kernel@vger.kernel.org>
Subject: Re: xmms (audio) skipping in 2.5 (not 2.4)
Date: Tue, 4 Mar 2003 18:28:09 +1100
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On Tue, 4 Mar 2003 04:52 pm, Martin J. Bligh wrote:
> >> So ... is there any easy way I can diagnose this? Does anyone else have
> >> a similar problem?
> >
> > Most of us who have worked with an O(1) scheduler based kernel have found
> > this  at various times. See the previous discussion with akpm about the
> > interactivity estimator. Akpm found that decreasing the maximum timeslice
> > duration would blunt the effect of the interactivity estimator giving
> > preference to the "wrong" task. In 2.4.20-ck4 I avoid this problem with
> > the  "desktop tuning" of making the max timeslice==min timeslice. Try an
> > -mm  kernel with the scheduler tunables patch and try playing with the
> > max  timeslice. Most have found that <=25 will usually stop these skips.
> > The  default max timeslice of 300ms is just too long for the desktop and
> > interactivity estimator.
>
> Heh, cool. I have the same patch in my tree too, fixed it without rebooting
> even ;-) Still a *tiny* bit of skipping, but infinitely better than it was.

Try decreasing prio_bonus_ratio to 15 as well

> Thanks very much,

Pleasure

Con
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