linux-kernel - Re: [PATCH 2/2] perf/x86: add RAPL PP1 energy counter support

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Date:	Tue, 17 Dec 2013 11:42:51 +0100
From:	Ingo Molnar <mingo@...nel.org>
To:	Stephane Eranian <eranian@...gle.com>
Cc:	linux-kernel@...r.kernel.org, peterz@...radead.org, mingo@...e.hu,
	ak@...ux.intel.com, acme@...hat.com, jolsa@...hat.com,
	zheng.z.yan@...el.com, bp@...en8.de, vincent.weaver@...ne.edu,
	maria.n.dimakopoulou@...il.com
Subject: Re: [PATCH 2/2] perf/x86: add RAPL PP1 energy counter support


Nice patch!

I noticed a couple of small details:

* Stephane Eranian <eranian@...gle.com> wrote:

> Add support for the RAPL energy counter PP1.
> 
> On client processors, it usually correspondss to the

s/correspondss
 /corresponds

> energy consumption of the builtin graphic card.
> 
> New event:
> - name: power/energy-gfx/
> - code: event=0x4
> - unit: 2^-32 Joules
> 
> On processors without graphics, this should count 0.
> The patch only enables this event on client processors.

>  EVENT_ATTR_STR(energy-cores, rapl_cores, "event=0x01");
>  EVENT_ATTR_STR(energy-pkg  , rapl_pkg, "event=0x02");
>  EVENT_ATTR_STR(energy-ram  , rapl_ram, "event=0x03");
> +EVENT_ATTR_STR(energy-gfx, rapl_gfx, "event=0x04");

>  EVENT_ATTR_STR(energy-cores.unit, rapl_cores_unit, "Joules");
>  EVENT_ATTR_STR(energy-pkg.unit  , rapl_pkg_unit, "Joules");
>  EVENT_ATTR_STR(energy-ram.unit  , rapl_ram_unit, "Joules");
> +EVENT_ATTR_STR(energy-gfx.unit  , rapl_gfx_unit, "Joules");

Nit: I think these fields have all similar lengths so they should be 
vertically aligned, something like:

 EVENT_ATTR_STR(energy-cores, rapl_cores, "event=0x01");
 EVENT_ATTR_STR(energy-pkg  , rapl_pkg  , "event=0x02");
 EVENT_ATTR_STR(energy-ram  , rapl_ram  , "event=0x03");
 EVENT_ATTR_STR(energy-gfx  , rapl_gfx  , "event=0x04");

 EVENT_ATTR_STR(energy-cores.unit, rapl_cores_unit, "Joules");
 EVENT_ATTR_STR(energy-pkg.unit  , rapl_pkg_unit  , "Joules");
 EVENT_ATTR_STR(energy-ram.unit  , rapl_ram_unit  , "Joules");
 EVENT_ATTR_STR(energy-gfx.unit  , rapl_gfx_unit  , "Joules");

Also, instead of 'gfx', shouldn't it be 'gpu' throughout the patch?

Thanks,

	Ingo
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