per-cpu counters (Re: svn commit: r190967 - head/sys/netinet)

[Luigi Rizzo]

On Sun, Apr 12, 2009 at 03:29:38PM +0100, Robert Watson wrote:
> 
> On Sun, 12 Apr 2009, Robert Watson wrote:
> 
> >>As an example, an approach i was considering is replace the existing 
> >>counters with an index in a global_counters[MAXCPU][] array so the 
> >>counter update will become something like this:
> 
> FYI, one other reason to put it all behind per-subsystem macros is that it 
> allows us to easily prototype another statistics implementation, the no-op, 
> on a per-subsystem basis.

good point, i didn't consider this.