Messages in this thread | | | Date | Thu, 26 Mar 2009 07:27:07 -0700 | From | Arjan van de Ven <> | Subject | Re: ext3 IO latency measurements (was: Linux 2.6.29) |
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On Thu, 26 Mar 2009 12:08:15 +0100 Jens Axboe <jens.axboe@oracle.com> wrote: > > Did you capture the trace of the long delays in the read test case? It > can be two things, at least. One is that each little read takes much > longer than it should, the other is that we get stuck waiting on a > dirty page and hence that slows down the reads a lot. >
would be interesting to run latencytop during such runs...
-- Arjan van de Ven Intel Open Source Technology Centre For development, discussion and tips for power savings, visit http://www.lesswatts.org
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