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Date: Mon, 03 Mar 2003 21:52:22 -0800
From: "Martin J. Bligh" <mbligh@aracnet.com>
To: Con Kolivas <kernel@kolivas.org>,
       linux-kernel <linux-kernel@vger.kernel.org>
Subject: Re: xmms (audio) skipping in 2.5 (not 2.4)
Message-ID: <104910000.1046757141@[10.10.2.4]>
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>> 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.
Thanks very much,

M.

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