Subject: Re: RFC on io-stalls patch
From: Chris Mason <mason@suse.com>
To: Jens Axboe <axboe@suse.de>
Cc: Andrea Arcangeli <andrea@suse.de>, Andrew Morton <akpm@osdl.org>,
       marcelo@conectiva.com.br, linux-kernel@vger.kernel.org, akpm@digeo.com
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Date: 15 Jul 2003 05:30:39 -0400
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On Tue, 2003-07-15 at 05:18, Jens Axboe wrote:
> On Tue, Jul 15 2003, Jens Axboe wrote:
> > > BTW, the contest run times vary pretty wildy.  My 3 compiles with
> > > io_load running on 2.4.21 were 603s, 443s and 515s.  This doesn't make
> > > the average of the 3 numbers invalid, but we need a more stable metric.
> > 
> > Mine are pretty consistent [1], I'd suspect that it isn't contest but your
> > drive tcq skewing things. But it would be nice to test with other things
> > as well, I just used contest because it was at hand.
> 

tcq is at 32, the controller is aic7xxx, the drive is an older wdc.

> Oh and in the same spirit, I'll do the complete runs on an IDE drive as
> well. Sometimes IDE vs SCSI shows the funniest things.

Thanks.

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