Subject: Re: [PATCH] CPU frequency display in /proc/cpuinfo
From: Lee Revell <rlrevell@joe-job.com>
To: Dave Jones <davej@redhat.com>
Cc: Erik Mouw <erik@harddisk-recovery.com>, Andi Kleen <ak@suse.de>,
       Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>,
       Andrew Morton <akpm@osdl.org>, cpufreq <cpufreq@www.linux.org.uk>,
       linux-kernel <linux-kernel@vger.kernel.org>
In-Reply-To: <20051205172513.GB12664@redhat.com>
References: <20051202181927.GD9766@wotan.suse.de>
	 <20051202104320.A5234@unix-os.sc.intel.com>
	 <20051204164335.GB32492@isilmar.linta.de>
	 <20051204183239.GE14247@wotan.suse.de> <1133725767.19768.12.camel@mindpipe>
	 <20051205011611.GA12664@redhat.com>
	 <20051205130224.GC17993@harddisk-recovery.com>
	 <20051205172513.GB12664@redhat.com>
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Date: Mon, 05 Dec 2005 12:27:30 -0500
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On Mon, 2005-12-05 at 12:25 -0500, Dave Jones wrote:
> On Mon, Dec 05, 2005 at 02:02:24PM +0100, Erik Mouw wrote:
>  > On Sun, Dec 04, 2005 at 08:16:11PM -0500, Dave Jones wrote:
>  > > I can't think of a single valid reason why a program would want
>  > > to know the MHz rating of a CPU. Given that it's a) approximate,
>  > > b) subject to change due to power management, c) completely nonsensical
>  > > across CPU vendors, and d) only one of many variables regarding CPU
>  > > performance, any program that bases any decision on the values found
>  > > by parsing that field of /proc/cpuinfo is utterly broken beyond belief.
>  > 
>  > If you want a userspace governor to change the CPU speed, you need to
>  > export the value to userland. 
> 
> We have sysfs files for that.
> 

OK thanks.  Last time I asked on LKML about it (~ 6 months ago) I was
told there's no sysfs interface yet.

Lee

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