[GE users] io usage always zero on Linux?

Rayson Ho rayrayson at gmail.com
Mon Nov 12 15:55:56 GMT 2007


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On Nov 12, 2007 9:54 AM,  <Andreas.Haas at sun.com> wrote:
> You mean context number of switches could be suited for measuring I/O
> operations? Wouldn't ru_inblock/ru_oublock be better suited, if these
> numbers were multiplied with the size of a block?

The Linux kernel does not keep ru_inblock and ru_oublock in the rusage
struct, and they are always 0.

The getrusage(2) manpage says only a few of the members of the rusage
struct are meaningful under Linux. And I did a small experiment
2.6.16 to confirm what the manpage says...

Rayson



>
> Regards,
> Andreas
>
>
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