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Date:      Mon, 03 Nov 2008 07:23:01 -0500
From:      "Alexandre \"Sunny\" Kovalenko" <gaijin.k@gmail.com>
To:        Alexander Motin <mav@FreeBSD.org>
Cc:        FreeBSD acpi <freebsd-acpi@freebsd.org>, freebsd-mobile@FreeBSD.org
Subject:   Re: Is the C3 possible with SMP?
Message-ID:  <1225714981.1184.7.camel@RabbitsDen>
In-Reply-To: <490EC154.9020801@FreeBSD.org>
References:  <490DF584.5080506@FreeBSD.org> <1225656933.1202.2.camel@RabbitsDen>  <490E245C.7070900@FreeBSD.org> <1225664813.1202.5.camel@RabbitsDen>  <490E2D19.1030502@FreeBSD.org> <1225670686.1153.8.camel@RabbitsDen>  <490EC154.9020801@FreeBSD.org>

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On Mon, 2008-11-03 at 11:16 +0200, Alexander Motin wrote:
> Alexandre "Sunny" Kovalenko wrote:
> > When laptop is moving around with me, all USB modules are unloaded and I
> 
> I will try to unload USB later today.
> 
> > get about 4 hours of battery life with wireless on, admittedly on the
> > light usage (reading/writing E-mails, browsing web, typing up occasional
> > document). I consider this good for 4.4lbs (<2kg) laptop.
> 
> I have a bit more then 3 hours at the same weight. Which CPU, video and
> chipset do you have?
This is CoreDuo T2400 with Intel 945GM video and Atheros 5212 a/b/g
wireless part. One other thing, I forgot to mention is: I set 

hw.pci.do_power_nodriver: 3

I have to be honest: I really do not know how much savings do I get from
which settings -- I merely went for most aggressive ones. YMMV.

> I have some doubts that C3 on only one of two cores could give much
> benefit. 
You are most likely right -- crude measurement by Kill-A-Watt shows 4%
difference which might as well be measurement error.

-- 
Alexandre "Sunny" Kovalenko (Олександр Коваленко)




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