Messages in this thread | | | Date | Mon, 3 Feb 2003 13:14:56 -0600 | From | Matt Reppert <> | Subject | Re: CPU throttling?? |
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On Mon, 03 Feb 2003 13:57:17 -0500 Valdis.Kletnieks@vt.edu wrote:
> On Mon, 03 Feb 2003 17:13:02 GMT, John Bradford said: > > > Incidently, Linux has always halted the processor, rather than spun in > > an idle loop, which saves power. > > It's conceivable that a CPU halted at 1.2Gz takes less power than one > at 1.6Gz - anybody have any actual data on this? Alternately phrased, > does CPU throttling save power over and above what the halt does?
Yes. I have a powerpc laptop that runs at 700 MHz. If I throttle the CPU clock speed down to 400 MHz and change nothing else the battery has noticeably longer life; since it's running slower, it takes less power when it's active (not halted).
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