linux-kernel - Re: [PATCH] eeepc-laptop: enable camera by default

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Date:	Fri, 5 Jun 2009 15:58:23 +0200
From:	Corentin Chary <corentin.chary@...il.com>
To:	Pekka Enberg <penberg@...helsinki.fi>
Cc:	acpi4asus-user@...ts.sourceforge.net, len.brown@...el.com,
	linux-kernel@...r.kernel.org,
	Alan Jenkins <sourcejedi.lkml@...glemail.com>
Subject: Re: [PATCH] eeepc-laptop: enable camera by default

On Fri, Jun 5, 2009 at 3:51 PM, Pekka Enberg<penberg@...helsinki.fi> wrote:
> Hi Corentin,
>
> On Fri, 2009-06-05 at 15:02 +0200, Corentin Chary wrote:
>> > That said, I am more than happy to measure this but I need a little bit
>> > more information to get started as I have never used powertop. So what
>> > is it exactly you want me to do?
>>
>> PowerTop (with a corretly configured kernel) will give you a power
>> usage estimate.
>>
>> CONFIG_NO_HZ=y
>> CONFIG_TIMER_STATS=y
>> CONFIG_DEBUG_KERNEL=y
>>
>> For propers results, shutdown all services and just keep a shell
>> (without X or network).
>> You can also test that with and without the camera driver.
>
> I did not see a power usage estimate. I am running PowerTOP 1.11 that
> comes with Ubuntu 9.04. So I am not sure if what I did is what you
> wanted me to do but I ran "powertop -t 60 -d" with camera enabled and
> disabled and here are the results.

Thanks for the results, next week I'll do some test on a minimal setup.


-- 
Corentin Chary
http://xf.iksaif.net - http://uffs.org
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