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Old 20th March 2009
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Carpetsmoker Carpetsmoker is offline
Real Name: Martin
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Join Date: Apr 2008
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Quote:
Originally Posted by vermaden
Up to yesterday there was no option to set highest value to limit max CPU speed to save power or limit overheat, but Boris Kochergin wrote a patch to support also the highest limit with debug.cpufreq.highest oid:
Code:
sysctl debug.cpufreq.highest=1200
I've been thinking, and I wonder just how useful this is.

A 2GHz CPU running at 1GHz will not consume anywhere near half the power, while a CPU running at 2GHz will complete a task close to twice as fast.
The result is that the CPU will take more time to complete a task, and it will require more power in the end.

I haven't done any test, but I suspect that setting this value lower than the maximum will actually cause the battery to last shorter.
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