linux-kernel - Re: exposing FSB clock speed in /sys

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Message-ID: <20070330192053.36107276@the-village.bc.nu>
Date:	Fri, 30 Mar 2007 19:20:53 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	eranian@....hp.com
Cc:	linux-kernel@...r.kernel.org, perfmon@...ali.hpl.hp.com
Subject: Re: exposing FSB clock speed in /sys

> Looking at the code, it seems that there is no standard way of extracting
> the FSB speed. For each processor model, you have different MSRs. I would
> think that the routines in the cpufreq code could be moved out and used
> as the basis to expose the information somewhere in /sys.

It's well un-documented, but one of the problems is that for many
processor lines the information isn't in public documents (eg the older
processors like the PII/PIII)

Alan
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