Re: RFC on io-stalls patch

Chris Mason (
15 Jul 2003 05:30:39 -0400

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.


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