Messages in this thread | | | Date | Tue, 27 Sep 2005 17:58:14 +0200 | From | Jens Axboe <> | Subject | Re: [patch 0/4] ide: Break ide_lock to per-hwgroup lock |
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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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