linux-kernel - Re: The ondemand CPUFreq code -- I hope the functionality stays

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Message-ID: <a44ae5cd0607280338x674aa92agb49f38a494bf8923@mail.gmail.com>
Date:	Fri, 28 Jul 2006 12:38:49 +0200
From:	"Miles Lane" <miles.lane@...il.com>
To:	"Dave Jones" <davej@...hat.com>,
	"Patrick McFarland" <diablod3@...il.com>,
	"Miles Lane" <miles.lane@...il.com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: The ondemand CPUFreq code -- I hope the functionality stays

On 7/28/06, Dave Jones <davej@...hat.com> wrote:
> On Thu, Jul 27, 2006 at 09:04:23PM -0400, Patrick McFarland wrote:
>
>  > I think you've gotten confused. Ondemand is a horrible governor that only
>  > flips between two cpu frequencies, the lowest and the highest.
>
> That isn't true.  I just double checked, and saw my core-duo changing
> between all 4 states it offers.

Yep, the ondemand governor switches between all frequencies on my
Pentium 4 M laptop.  It's a HP Pavillion dv1240us.

>  > Use the Conservative governor instead.
>
> This governor is based on the same code as on-demand with some subtle
> tweaks to make it not change the frequency as often.  If anything *this*
> one should be less 'active' for you than ondemand.

I have tried the other governers (albeit a while ago) and found they
didn't manage power anywhere near as well as ondemand.  Perhaps
results vary for each governor according to CPU and chipset.

      Miles
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