linux-kernel - Re: [PATCH] tracing, perf: add more power related events

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Message-ID: <AANLkTikg70zAHyA9pcWybz7SsQSPOuzUeuBdwX1cs+MP@mail.gmail.com>
Date:	Fri, 3 Sep 2010 19:00:32 +0200
From:	Jean Pihet <jean.pihet@...oldbits.com>
To:	Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...e.hu>,
	Thomas Renninger <trenn@...e.de>,
	Len Brown <len.brown@...el.com>,
	Arjan Van De Ven <arjan@...ux.intel.com>,
	arjan@...radead.org, Kevin Hilman <khilman@...prootsystems.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] tracing, perf: add more power related events

Hi,

I would like to get some feedback on the code or on the new events
definition, cf. proposed patch in this thread.

The idea is to provide new events for power management, as indicated
at http://www.omappedia.com/wiki/Power_Management_Debug_and_Profiling

As soon as the new events are defined -i.e. accepted in the mainline
code- the tracepoints will be added for ARM/OMAP.

Any idea, remark or feedback welcome!

Jean

On Mon, Aug 23, 2010 at 12:25 PM, Jean Pihet <jean.pihet@...oldbits.com> wrote:
> Hi,
>
> On Mon, Aug 16, 2010 at 1:25 PM, Jean Pihet <jean.pihet@...oldbits.com> wrote:
>> On Mon, Aug 16, 2010 at 1:15 PM, Peter Zijlstra <peterz@...radead.org> wrote:
>>> On Mon, 2010-08-16 at 13:09 +0200, Jean Pihet wrote:
>>>> This patch adds new generic events for dynamic power management
>>>> tracing:
>>>> - clock events class: used for clock enable/disable and for
>>>>    clock rate change,
>>>> - power_domain events class: used for power domains transitions.
>>>>
>>>> The OMAP architecture is using the new events for PM debugging, however
>>>> the new events are made generic enough to be used by all platforms.
>>>
>>> Even though I'm blissfully ignorant on power stuffs, the proposed set of
>>> trace thingies doesn't appear to even start covering x86..
>> Ok, let's discuss it! The intention is to provide new generic events.
>>
>>>
>>> CC'ed people who know more on the subject.
> Any news on the topic? Any feedback on the code or on the new events
> definition is welcome.
>
>>>
> Thanks!
>
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