Power consumption measurements for ARM

Power consumption measurements for ARM

[taeung]

Hi, perf hackers

I have other question.
As I know, perf also supports RAPL(running average power limit )
for power consumption measurements.

And as I understand, the amount of power consumption is estimated
by using hardware performance counters and I/O models (sure, in 
availableintel CPUs).

And I've not found power consumption measurements for ARM (likeCortex-A9)
except for using tools like ARM Energy Probes and Linux EAPTools.

But as I know , The Cortex-A9 Core Platform has dynamic scaling 
ofvoltage and frequency.
(Dynamic Voltage and Frequency Scaling (DVFS))

Have you ever tried to measure power consumption on ARM using thingslike 
DVFS?

and I also wonder how to use perf to measure power consumption on 
available intel CPU.

- Taeung -

Re: Power consumption measurements for ARM

[Namhyung Kim]

Hi taeung,

On Tue, 12 Aug 2014 17:20:45 +0900, taeung wrote:
> Hi, perf hackers
>
> I have other question.
> As I know, perf also supports RAPL(running average power limit )
> for power consumption measurements.
>
> And as I understand, the amount of power consumption is estimated
> by using hardware performance counters and I/O models (sure, in
> availableintel CPUs).
>
> And I've not found power consumption measurements for ARM (likeCortex-A9)
> except for using tools like ARM Energy Probes and Linux EAPTools.
>
> But as I know , The Cortex-A9 Core Platform has dynamic scaling
> ofvoltage and frequency.
> (Dynamic Voltage and Frequency Scaling (DVFS))
>
> Have you ever tried to measure power consumption on ARM using
> thingslike DVFS?

You may want to look at powertop - see https://01.org/powertop .

>
> and I also wonder how to use perf to measure power consumption on
> available intel CPU.

Please check https://lkml.org/lkml/2013/11/12/393 .

Thanksm,
Namhyung