Re: [PATCH v5 1/8] Documentation: arm: define DT cpu capacity-dmips-mhz bindings

From: Juri Lelli
Date: Wed Jun 15 2016 - 10:22:46 EST


On 15/06/16 15:04, Mark Brown wrote:
> On Wed, Jun 15, 2016 at 11:17:50AM +0100, Juri Lelli wrote:
>
> > +CPU capacities are obtained by running a suitable benchmark. This binding makes
> > +no aspersions on the validity or suitability of any particular benchmark, the
> > +final capacity should, however, be:
>
> Makes no guarantees. An aspersion is an insult!
>

Whoops! :-/

Sure, I'll change that.

> > +CPU capacities are obtained by running the Dhrystone benchmark on each CPU at
> > +max frequency. The obtained DMIPS score is then divided by the frequency (in
> > +MHz) at which the benchmark has been run, so that DMIPS/MHz are obtained.
> > +Such values are then normalized w.r.t. the highest score obtained in the
> > +system.
>
> Perhaps worth mentioning that caches and so on should be enabled (based
> on previous experience with people doing bringup)?

OK. I'll add something along this line.

Thanks,

- Juri