Re: per-cpu statistics (Re: CVS commit: src)

[Jason Thorpe <thorpej%shagadelic.org@localhost>]

On Apr 10, 2008, at 10:02 PM, Simon Burge wrote:

> I've just start looking at the Solaris kstat interface.  Is there  
> really
> much of a difference between a sysctl node and a named kstat?  My
> first thought after a bit of reading is that we could add an interface
> to query evcnts by name, but then we're just back at sysctl nodes.
> At which stage, do we just do away with evcnts and use sysctl nodes
> anyways?

I'm ambivalent about the access method for user space.  I think  
keeping the evcnt API is important in the kernel, however, because it  
allows all the work to make them per-CPU to be centralized in one place.

> I'll keep reading up on kstat, but can someone easily summarise what
> kstat gives us over sysctl?
>
> Cheers,
> Simon.

-- thorpej