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Date: Sun, 31 Dec 2000 13:28:50 +0200
From: Matti Aarnio <matti.aarnio@zmailer.org>
To: Mike Galbraith <mikeg@wen-online.de>
Cc: linux-kernel <linux-kernel@vger.kernel.org>
Subject: Re: scheduling problem test13-pre7
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In-Reply-To: <Pine.Linu.4.10.10012311014280.1247-100000@mikeg.weiden.de>; from mikeg@wen-online.de on Sun, Dec 31, 2000 at 10:42:26AM +0100
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On Sun, Dec 31, 2000 at 10:42:26AM +0100, Mike Galbraith wrote:
> Hi,
> 
> While running iozone, I notice severe stalls of vmstat output
> despite vmstat running SCHED_RR and mlockall().

   Lets eliminate the obvious:

   - Are you running with IDE disk ?
   - Does   hdparm  /dev/hda(whatever)    report:

	/dev/hda:
	 unmaskirq    =  0 (off)
	 using_dma    =  0 (off)

   The IKD uses local interrupts, so this isn't necessarily true...

-
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