[lkml]   [2009]   [Mar]   [26]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: ext3 IO latency measurements (was: Linux 2.6.29)
On Thu, 26 Mar 2009 12:08:15 +0100
Jens Axboe <> 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,

 \ /
  Last update: 2009-03-26 15:29    [from the cache]
©2003-2014 Jasper Spaans. hosted at Digital Ocean