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Date: Wed, 19 Nov 2008 10:07:21 +0200
From: Alexander Motin <mav@FreeBSD.org>
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To: Robert Noland <rnoland@FreeBSD.org>
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Cc: svn-src-head@freebsd.org, svn-src-all@freebsd.org,
	src-committers@freebsd.org
Subject: Re: svn commit: r185050 - head/usr.sbin/powerd
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Robert Noland wrote:
> On Tue, 2008-11-18 at 13:24 +0000, Alexander Motin wrote:
>> Log:
>>   Set of powerd enchancements:
>>   
> Somehow this seems to be too sensitive.  My laptop previously idled at
> 150Mhz... Occasionally bouncing up to maybe 450Mhz.  With the new algo,
> it will sometimes drop to 900Mhz, but winds itself right back up to
> 1.8Ghz.

Can you give me any details? How many CPUs do you have, which set of
frequencies does it have? Are there any powerd options specified? Does
powerd detects battery power? With AC or unknown power it will run in
hiadaptive mode which keeps much higher frequencies. Can you run `powerd
-v` and look what happens there?

powerd now drops/rises frequency exponentially, so lower frequency will
be reached only after some period of idle. Rising is much faster to
quickly restore system interactivity.

-- 
Alexander Motin