Re: Plans for better performance metrics in upcoming kernels?

[Nick Piggin]

Scott Chapman wrote:

> Hi,
> I'm wondering what the plans are for more accurate and more useful performance 
> metrics in upcoming kernels.
>
> CPU Utilization by process is apparently a known-inaccuracy.

This could be improved using Ingo's nanosecond scheduler patch.

> There are no disk I/O metrics per process.

This is now quite easy with per process IO contexts.

> CPU Queue Length doesn't appear to be available?

It wouldn't be difficult.

> Etc.
>
> Linux clearly falls behind the competition in this area. It makes it rather 
> tough to do system performance analysis on a Linux box!  :-)
>
> Is there a plan to deal with these issues?  ETA's?

Thinks are worked on depending on demand, and interest. I think a lot
of people are put of doing good kernel metrics due to lack of good
extensible userspace tools, and maybe a lack of standard ways to do the
exporting.


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