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Date:      Thu, 31 Oct 2013 10:37:57 -0500
From:      Dan Nelson <dnelson@allantgroup.com>
To:        aurfalien <aurfalien@gmail.com>
Cc:        FreeBSD Mailing List <freebsd-questions@freebsd.org>
Subject:   Re: CPU Turbo mode
Message-ID:  <20131031153757.GG63947@dan.emsphone.com>
In-Reply-To: <70EC0F10-FAD0-4EA6-8C1F-A95B1C786B7B@gmail.com>
References:  <70EC0F10-FAD0-4EA6-8C1F-A95B1C786B7B@gmail.com>

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In the last episode (Oct 30), aurfalien said:
> Hi all,
> 
> I've powerd enabled and see this message often when running powerd -v;
> 
> current freq 2201 MHz ( 0), wanted freq 4402 MHz
> 
> Were is the 4402 value gotten from, is it a turbo value and if so, why is
> it not boosting?

Depending on your settings, powerd will try and raise the clock rate at
different rates based on system load.  4402 is simply double the current
clock rate, which probably means your system is busy and powerd is trying to
quickly raise the clock rate.  It doesn't bother capping the target value at
the maximum, though, since it'll find out a bit later in the code when it
actually tries to set a new clockrate and realizes that it's already at max.

-- 
	Dan Nelson
	dnelson@allantgroup.com



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