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From: George Hartzell <hartzell@alerce.com>
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Date: Wed, 8 Aug 2007 14:59:49 -0700
To: Evren Yurtesen <yurtesen@ispro.net>
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Cc: hackers@freebsd.org
Subject: Re: powerd feature proposal...(and a small problem)
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Evren Yurtesen writes:
 > Hi,
 > 
 > The problem is with an 8 processor system. If a process is not threaded and 
 > starts using 100% cpu time of a single processor, the system still shows over 
 > 80% idle. Whereas this single process works really slow if the system is already 
 > at the slowest speed. Is there a simple way to fix this problem? It is not so 
 > big problem but sometimes it is quite annoying :)
 > [...]

I edited /etc/rc.d/powerd and just after the command line I added

  command_arg="-r 84 -i 93"

[values determined by trial and error]

g.