Re: [PATCH 3/3] show energy consumption info in perf tool

[Ingo Molnar]

* Zhang Rui <rui.zhang@xxxxxxxxx> wrote:

> Introduce four new perf software events
>
> PERF_COUNT_SW_PKG_ENERGY
> PERF_COUNT_SW_CORE_ENERGY
> PERF_COUNT_SW_UNCORE_ENERGY
> and
> PERF_COUNT_SW_DRAM_ENERGY
> 
> To use it, users can run
> perf stat -e pkg-energy foo
> to get the package energy consumption when running foo.

That's very interesting - being able to profile workloads by 
power/energy use looks like a *very* powerful feature.

Are you allowed to show us some sample output of the data? What's the 
granularity of this info? Say what is the output of:

  perf stat -e pkg-energy -e core-energy -e uncore-energy -e dram-energy -a sleep 10

?

Also, have you tried something like:

	perf record -a -e pkg-energy sleep 60

	perf report

To see where most of the energy is used within a 1 minute interval?

Also, conceptually these are really hardware events, right?

Thanks,

	Ingo
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