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Message-ID: <d120d5000602281219v40d57d5ftdb3ab7bc95d0063c@mail.gmail.com>
Date: Tue, 28 Feb 2006 15:19:13 -0500
From: "Dmitry Torokhov" <dmitry.torokhov@gmail.com>
Reply-To: dtor_core@ameritech.net
To: "Dave Jones" <davej@redhat.com>, "Matt Mackall" <mpm@selenic.com>,
       "Adrian Bunk" <bunk@stusta.de>,
       "Dmitry Torokhov" <dtor_core@ameritech.net>, davej@codemonkey.org.uk,
       "Zwane Mwaikambo" <zwane@commfireservices.com>,
       "Samuel Masham" <samuel.masham@gmail.com>,
       "Jan Engelhardt" <jengelh@linux01.gwdg.de>,
       linux-kernel@vger.kernel.org, "Andrew Morton" <akpm@osdl.org>,
       cpufreq@lists.linux.org.uk, ak@suse.de
Subject: Re: Status of X86_P4_CLOCKMOD?
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On 2/28/06, Dave Jones <davej@redhat.com> wrote:
> On Tue, Feb 28, 2006 at 01:46:29PM -0600, Matt Mackall wrote:
>  >
>  > This is perplexing. Less heat equals less power usage according to the
>  > laws of thermodynamics.
>
> you end up taking longer to do the same amount of work, so you
> end up using the same overall power.
>

I'd say that energy usage is the same _per unit of work_. But if you
compare a box that is sitting idle 90% of the time at 0% throttling
vs. a box that is sitting idle 80% of the time with 50% throttling and
neither of these boxes support C2 you'll find that the second box uses
less energy overall.

--
Dmitry
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