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

From	Juri Lelli <juri.lelli@arm.com>
Newsgroups	linux.kernel
Subject	Re: [PATCH v5 1/8] Documentation: arm: define DT cpu capacity-dmips-mhz bindings
Date	2016-06-15 16:30 +0200
Message-ID	<rKjZo-3Eh-33@gated-at.bofh.it> (permalink)
References	<rKg5r-1fI-11@gated-at.bofh.it> <rKg5r-1fI-19@gated-at.bofh.it> <rKjG1-3xJ-15@gated-at.bofh.it>
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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

Thread

[PATCH v5 0/8] CPUs capacity information for heterogeneous systems Juri Lelli <juri.lelli@arm.com> - 2016-06-15 12:20 +0200
  [PATCH v5 7/8] arm: add sysfs cpu_capacity attribute Juri Lelli <juri.lelli@arm.com> - 2016-06-15 12:20 +0200
  [PATCH v5 1/8] Documentation: arm: define DT cpu capacity-dmips-mhz bindings Juri Lelli <juri.lelli@arm.com> - 2016-06-15 12:20 +0200
    Re: [PATCH v5 1/8] Documentation: arm: define DT cpu  capacity-dmips-mhz bindings Vincent Guittot <vincent.guittot@linaro.org> - 2016-06-15 15:00 +0200
      Re: [PATCH v5 1/8] Documentation: arm: define DT cpu  capacity-dmips-mhz bindings Juri Lelli <juri.lelli@arm.com> - 2016-06-15 16:30 +0200
    Re: [PATCH v5 1/8] Documentation: arm: define DT cpu  capacity-dmips-mhz bindings Mark Brown <broonie@kernel.org> - 2016-06-15 16:10 +0200
      Re: [PATCH v5 1/8] Documentation: arm: define DT cpu  capacity-dmips-mhz bindings Juri Lelli <juri.lelli@arm.com> - 2016-06-15 16:30 +0200
    Re: [PATCH v5 1/8] Documentation: arm: define DT cpu  capacity-dmips-mhz bindings Rob Herring <robh+dt@kernel.org> - 2016-06-16 00:20 +0200
      Re: [PATCH v5 1/8] Documentation: arm: define DT cpu  capacity-dmips-mhz bindings Juri Lelli <juri.lelli@arm.com> - 2016-06-16 10:30 +0200
        Re: [PATCH v5 1/8] Documentation: arm: define DT cpu  capacity-dmips-mhz bindings Juri Lelli <juri.lelli@arm.com> - 2016-06-22 19:00 +0200
  [PATCH v5 3/8] arm, dts: add TC2 cpu capacity-dmips-mhz information Juri Lelli <juri.lelli@arm.com> - 2016-06-15 12:20 +0200
  [PATCH v5 6/8] arm64, dts: add Juno r2 cpu capacity-dmips-mhz information Juri Lelli <juri.lelli@arm.com> - 2016-06-15 12:20 +0200
  [PATCH v5 4/8] arm64: parse cpu capacity-dmips-mhz from DT Juri Lelli <juri.lelli@arm.com> - 2016-06-15 12:20 +0200
    Re: [PATCH v5 4/8] arm64: parse cpu capacity-dmips-mhz from DT Juri Lelli <juri.lelli@arm.com> - 2016-06-15 12:30 +0200
    Re: [PATCH v5 4/8] arm64: parse cpu capacity-dmips-mhz from DT Mark Brown <broonie@kernel.org> - 2016-06-15 16:00 +0200
      Re: [PATCH v5 4/8] arm64: parse cpu capacity-dmips-mhz from DT Juri Lelli <juri.lelli@arm.com> - 2016-06-15 16:50 +0200
  [PATCH v5 2/8] arm: parse cpu capacity-dmips-mhz from DT Juri Lelli <juri.lelli@arm.com> - 2016-06-15 12:30 +0200

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