Re: hackbench vs select_idle_sibling; was: [tip:sched/core] sched/fair, cpumask: Export for_each_cpu_wrap()

Peter Zijlstra
2017-06-06T09:22:16Z

On Mon, Jun 05, 2017 at 02:00:21PM +0100, Matt Fleming wrote:
> On Fri, 19 May, at 04:00:35PM, Matt Fleming wrote:
> > On Wed, 17 May, at 12:53:50PM, Peter Zijlstra wrote:
> > >
> > > Please test..
> >
> > Results are still coming in but things do look better with your patch
> > applied.
> >
> > It does look like there's a regression when running hackbench in
> > process mode and when the CPUs are not fully utilised, e.g. check this
> > out:
>
> This turned out to be a false positive; your patch improves things as
> far as I can see.

Hooray, I'll move it to a part of the queue intended for merging.

Thanks!