Re: Plans for better performance metrics in upcoming kernels?

[Nick Piggin <piggin@cyberone.com.au>]

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.