Re: ext3 IO latency measurements (was: Linux 2.6.29)

[Arjan van de Ven]

On Thu, 26 Mar 2009 12:08:15 +0100
Jens Axboe <jens.axboe@xxxxxxxxxx> 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
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/