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

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From: Dave Jones <davej@...>
To: Alexander Rajula <chris@...>
Cc: <linux-kernel@...>
Subject: Re: PROBLEM: /proc/cpuinfo reports erroneous CPU frequency. (2.6.23 &amp; 2.6.22)
Date: Monday, December 10, 2007 - 2:04 pm

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

-- 
http://www.codemonkey.org.uk
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Messages in current thread:
PROBLEM: /proc/cpuinfo reports erroneous CPU frequency. (2.6..., Alexander Rajula, (Sun Dec 9, 9:48 pm)
Re: PROBLEM: /proc/cpuinfo reports erroneous CPU frequency. ..., Dave Jones, (Mon Dec 10, 2:04 pm)
Re: PROBLEM: /proc/cpuinfo reports erroneous CPU frequency. ..., Frans Pop, (Sun Dec 9, 10:49 pm)