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To: "Grover, Andrew" <andrew.grover@intel.com>
cc: "'Mike Smith'" <msmith@FreeBSD.ORG>,
        Mitsuru IWASAKI <iwasaki@jp.FreeBSD.org>, acpi-jp@jp.FreeBSD.org
In-reply-to: Your message of "Mon, 09 Jul 2001 17:00:14 PDT."
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Date: Tue, 10 Jul 2001 19:45:22 -0700
From: Mike Smith <msmith@freebsd.org>
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Subject: [acpi-jp 1171] Re: HEADS UP - more ACPI updates, CPU throttling 
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X-Originator: msmith@freebsd.org

> Throttling is really something you only want to do when you have to. For
> example, to keep the system from overheating.
> 
> It is not the best battery/performance tradeoff. Throttling will take less
> power, but will also mean that the CPU's work takes twice as long to
> complete. You want the processor to be idle, and get it into a low power
> state (C1, C2 or C3) as soon as possible.

The clock speed/power consumption/performance vector isn't straight though; 
there's a "maximum efficiency" point which is typically not at "maximum 
clock rate".  Guessing the actual location of this point is kinda 
difficult though. 8(

-- 
... every activity meets with opposition, everyone who acts has his
rivals and unfortunately opponents also.  But not because people want
to be opponents, rather because the tasks and relationships force
people to take different points of view.  [Dr. Fritz Todt]
           V I C T O R Y   N O T   V E N G E A N C E


