Date: Tue, 8 Apr 2003 08:49:23 +0200 From: Tobias Roth <roth@iam.unibe.ch> To: Nicholas Basila <mlists@northglobe.com> Cc: freebsd-questions@freebsd.org Subject: Re: find out current CPU frequency Message-ID: <20030408064923.GA21535@speedy.unibe.ch> In-Reply-To: <200304071247.13863.mlists@northglobe.com> References: <20030407071722.GC4573@speedy.unibe.ch> <200304071247.13863.mlists@northglobe.com>
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> > I would like to find out what the current CPU frequency is on my > > laptop. I strongly suspect that my laptop, as well as many other > > models, pretty much permanently run on degraded performance, even > > when under full load. > > > > At the moment, I use both 4.8 and 5.0 Release with apm, but I plan > > to upgrade tocurrent soon. > dmesg | grep CPU > Isn't that good enough? Or do you mean after boot? no. that is the maximum frequency the cpu runs at, which is fixed. with intels speedstep there is a possibility that the cpu runs at a lower frequency than that, depending on the current load. the idea behind it is this: high load -> high freq -> high power consumption, more fan activity low load -> lower freq -> lower power consumption, less fan activity linprocfs for instance always shows a current cpu freq of 1.1something GHZ on my 1.8GHz P4. however I have no idea how representative that is. i strongly suspect that most modern laptops constantly run under a lower than max frequency, and I would like to know a way to check this. greets, t.
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