I/O size distribution?

[Antonello Piemonte <apiemont@xxxxxxxxxxxxxx>]

Hello

I have read that under Solaris one can use DTrace to get I/O request
size distribution on a global scale (also on a per process/pid basis).
See for example

http://prefetch.net/articles/observeiodtk.html

Can anyone recommend an alternative to get similar information under
CentOS? I looked into dtrace for linux but it seems still work in
progress, even putting aside CDDL issues ...

http://www.crisp.demon.co.uk/tools.html

Thanks!
Antonello
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