Re: [RFC PATCH 0/2] sched: move content out of core files for load average

[Ingo Molnar <mingo@kernel.org>]

* Peter Zijlstra <peterz@infradead.org> wrote:

> On Fri, 2013-04-19 at 10:25 +0200, Ingo Molnar wrote:
> > It might eventually make sense to integrate the 'average load'
> > calculation as well 
> > with all this - as they really have a similar purpose, the avenload[]
> > vector of 
> > averages is conceptually similar to the rq->cpu_load[] vector of
> > averages.
> 
> The /proc/loadavg definition isn't useful for anything remotely sane
> wrt load-balancing or otherwise, so I don't really see that integration
> happening (its a measure of how many tasks are blocked, where the
> load-balancer needs a measure of how many tasks are wanting to run).

Well, loadavg also includes running tasks:

        nr_active = this_rq->nr_running;
        nr_active += (long) this_rq->nr_uninterruptible;

but yeah, the two are not the same. It could at least integrate in terms 
of averaging code, working on two different instances of data structures - 
but yeah, full integration is indeed not possible.

Thanks,

	Ingo