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Date: Tue, 19 Jul 2005 14:51:22 +0800
From: hugang@soulinfo.com
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: hugang@soulinfo.com, Tony Lindgren <tony@atomide.com>,
       linux-kernel@vger.kernel.org,
       "Pallipadi, Venkatesh" <venkatesh.pallipadi@intel.com>,
       Jonathan Corbet <corbet@lwn.net>, Pavel Machek <pavel@ucw.cz>,
       Bernard Blackham <b-lkml@blackham.com.au>,
       Christian Hesse <mail@earthworm.de>,
       Zwane Mwaikambo <zwane@arm.linux.org.uk>
Subject: Re: [PATCH] Dynamic tick for x86 version 050610-1
Message-ID: <20050719065122.GA5913@hugang.soulinfo.com>
References: <20050602013641.GL21597@atomide.com> <200506021030.50585.mail@earthworm.de> <20050602174219.GC21363@atomide.com> <20050603223758.GA2227@elf.ucw.cz> <20050610041706.GC18103@atomide.com> <20050610091515.GH4173@elf.ucw.cz> <20050610151707.GB7858@atomide.com> <20050610221501.GB7575@atomide.com> <20050618033419.GA6476@hugang.soulinfo.com> <1119076233.18247.27.camel@gaston>
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On Sat, Jun 18, 2005 at 04:30:32PM +1000, Benjamin Herrenschmidt wrote:
> 
> > I'm try to port it powerpc, Here is a patch.
> > 
> >  Port Dynamic Tick Timer to new platform is easy. :)
> >   1) Find the reprogram timer interface.
> >   2) do a hook in the idle function.
> > 
> > That worked on my PowerBookG4 12'.
> 
> Did you get a measurable gain on power consumption ?
> 
> Last time I toyed with this, I didn't.

Today I do a measurable about it. 

First I using 2.6.12 without dynamic enable and unplug the AC power,
I check the /proc/pmu/battery_0, like this.
--
 flags      : 00000011
 charge     : 907
 max_charge : 2863
 current    : -987
 voltage    : 10950
 time rem.  : 3600
--
I only intresting with current, that show the system power load. 

When I enable dynamic, The current can low at -900.

So, It works. :>

2.6.12 + suspend2 + ck3 + dynamic 
http://soulinfo.com/~hugang/kernel/linux-2.6.12/

-- 
Hu Gang       .-.    Steve
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