Re: [dwm] [OT] frequency scaling and power consumption

From: bill lam <>
Date: Sat, 9 May 2009 13:56:09 +0800

> Personally I have noticed that locking my laptops scaling CPU to the
> lowest frequency does give quite a noticeable improvement to the battery
> life, around an extra hour on top of the usual 4~ hours and reduces the
> temperature enough to make the fan shut off . Just enabling on-demand
> scaling didn't help much as it would scale up to full frequency far to
> often. Even with the CPU locked in lo frequency mode it almost never lags.

Thanks all for confirmation. Since I only have a desktop, no
notebook/netbook ;-( it is somehow difficult to verify the
improvement. I now lock the cpu frequency to 1.1GHZ (half of the
original 2.1G).

Less heat means less power consumption, I guess someone suggested,
(I'm not sure that's why I asked for advise), that it takes more time
to complete the job at lower frequency so that actual power
consumption will in some case increase.

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Received on Sat May 09 2009 - 05:56:09 UTC

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