Re: [PATCH RESEND v9 00/10] sched: consolidation of CPU capacity and usage

Morten Rasmussen
2015-02-20T11:51:38Z

On Fri, Feb 20, 2015 at 11:34:47AM +0000, Peter Zijlstra wrote:
> On Thu, Feb 19, 2015 at 12:49:40PM +0000, Morten Rasmussen wrote:
>
> > Also, it still not clear why patch 10 uses relative capacity reduction
> > instead of absolute capacity available to CFS tasks.
>
> As present in your asymmetric big and small systems? Yes it would be
> unfortunate to migrate a task to an idle small core when the big core is
> still faster, even if reduced by rt/irq work.

Yes, exactly. I don't think it would cause any harm for symmetric cases
to use absolute capacity instead. Am I missing something?