> A related question is what is the best way to get configuration information
> as opposed to performance information. For the kernel, most of the
> performance data is separated out cleanly in kstats, but applications 
> still have constructs in /proc such as prusage, which contains the 
> cpu usage (derived from the days of BSD), over and above 
> /proc/pid/status and the like.
> 
> Is it legitimate to says /CPUfs is to be primarily or entirely configuration?

There is no particular reason why CPufs should be limited to configuration 
information - it seems to be a perfectly valid place for some of the 
performance characteristics as well. 

- akolb

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