Re: [PATCH v5 00/10] track CPU utilization

Quentin Perret
2018-06-05T14:10:00Z

On Tuesday 05 Jun 2018 at 15:55:43 (+0200), Vincent Guittot wrote:
> On 5 June 2018 at 15:52, Quentin Perret <quentin.perret@arm.com> wrote:
> > On Tuesday 05 Jun 2018 at 15:18:38 (+0200), Vincent Guittot wrote:
> >> On 5 June 2018 at 15:12, Quentin Perret <quentin.perret@arm.com> wrote:
> >> I would say no because when one will decrease the other one will not
> >> increase at the same pace and we will have some wrong behavior or
> >> decision
> >
> > I think I get your point. Yes, sometimes, the slow-moving rt_avg can be
> > off a little bit (which can be good or bad, depending in the case) if your
> > RT task runs a lot with very changing behaviour. And again, I'm not
> > fundamentally against the idea of having extra complexity for RT/IRQ PELT
> > signals _if_ we have a use-case. But is there a real use-case where we
> > really need all of that ? That's a true question, I honestly don't have
> > the answer :-)
>
> The iperf test result is another example of the benefit

The iperf test result ? The sysbench test you mean ?