Re: PROBLEM: /proc/cpuinfo reports erroneous CPU frequency.(2.6.23 & 2.6.22)

From: Dave Jones
Date: Mon Dec 10 2007 - 13:04:55 EST


On Mon, Dec 10, 2007 at 02:48:54AM +0100, Alexander Rajula wrote:
> While using 2.6.23 and 2.6.22 (earlier kernels have not been tested) /proc/cpuinfo reports the wrong CPU frequency:
>
>
> While overclocking an AMD Athlon X2 (2GHz) CPU /proc/cpuinfo reports the wrong CPU frequency.
> I am quite puzzled by this.
> Is this an error in the kernel, or is there something strange going on?

cpu frequency scaling relies on static tables in the BIOS that contain
a bunch of predefined frequencies. When you overclock, you're running
at frequencies that aren't in these tables. Everything falls apart as a result.

There's nothing here to fix, don't overclock.

Dave

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http://www.codemonkey.org.uk
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