linux-kernel - Re: Battery life difference

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Message-ID: <20080709203216.GF11006@ucw.cz>
Date:	Wed, 9 Jul 2008 22:32:17 +0200
From:	Pavel Machek <pavel@...e.cz>
To:	Felipe Balbi <felipebalbi@...rs.sourceforge.net>
Cc:	Arjan van de Ven <arjan@...radead.org>,
	Kernel development list <linux-kernel@...r.kernel.org>,
	linux-acpi@...r.kernel.org
Subject: Re: Battery life difference

On Sat 2008-07-05 20:41:07, Felipe Balbi wrote:
> Hi,
> 
> On Sat, Jul 5, 2008 at 6:54 PM, Arjan van de Ven <arjan@...radead.org> wrote:
> > you may also need to toggle your bios to enable AHCI btw
> >
> >>
> >> > Also take a look at
> >> > http://kerneltrap.org/mailarchive/linux-kernel/2008/5/8/1771024
> >> > because these patches save like 0.75W in our lab.
> >>
> >> cool, is it merged upstream ?
> >> I'll build current git kernel and reply again with new linux results.
> >> It could be that ubuntu 2.6.24 is broken somehow...
> >>
> >> > To be honest, I'm surprised at your results; in our testing (with a
> >> > different distro though) we don't see such a difference and Linux is
> >> > doing rather well.
> >>
> >> can you get powertop results in a 2.6.24 distro kernel and current git
> >> kernel ?
> >
> > most of my measurement machines are in the office ;(
> >
> > Anyway, also make sure you use the 0.11 version of powertop; we added
> > some newer stuff into that version...
> 
> Cool, now I'm using current linux 2.6.26-rc8 from git
> b8a0b6ccf2ba2519ace65d782b41ee91bf3c3778
> 
> Now I'm reaching 9.8w consumption :-)

Cool... how low can Windows go?
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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