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Date: Fri, 10 Feb 2006 19:47:31 -0500
From: Jonathan Noack <noackjr@alumni.rice.edu>
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To: Krzysztof Kowalik <kkowalik@uci.agh.edu.pl>
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Cc: freebsd-current@freebsd.org
Subject: Re: -current is sluggish
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Krzysztof Kowalik wrote:
> Max Laier <max@love2party.net> wrote:
>> I see it too, but only when the laptop is sitting idle for a while and powerd 
>> scaled down to 75Mhz.  You can try to put some load on it (e.g. yes(1)) and 
>> see if that improves things.
> 
> Speaking of which, it would be nice to be able to tell powerd not to
> slow the CPU down below the certain limit -- 75MHz causes annoying
> issues, like X-based applications (psi, xterm) missing key presses, 
> when I'm typing fast. ;)

I think debug.cpufreq.lowest is what you want.  It is documented in 
cpufreq(4):
"Lowest CPU frequency in MHz to offer to users.  This setting is also 
accessible via a tunable with the same name.  This can be used to 
disable very low levels that may be unusable on some systems."

-Jonathan