Re: [patch 0/4] ide: Break ide_lock to per-hwgroup lock

[Jens Axboe]

On Tue, Sep 27 2005, Ravikiran G Thirumalai wrote:
> On Tue, Sep 27, 2005 at 05:26:42PM +0200, Jens Axboe wrote:
> > On Tue, Sep 27 2005, Ravikiran G Thirumalai wrote:
> > 
> > You should run it eg 10 times on each kernel to get a feel for the
> > variance of the results. Were you testing 2 or 4 disks?
> > 
> 
> Yes, I was planning to do that,  We were testing with 2 disks.

With 2 disks, the 5.5% sounds like an aweful lot. What block size were
the tests run with? To get the file system out of the way, you could run
something as simple as a dd on each device. That should show queueing
contention (which I guess is the prime area of contention) more
isolated. And profiles would still be very interesting to see :-)

-- 
Jens Axboe

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