From: Dave Jones <davej@redhat.com>
To: Patrick <mccpat@gmail.com>
Cc: LKML <linux-kernel@vger.kernel.org>
Subject: Re: Incorrect CPU Frequency in /proc/cpuinfo
Date: Sat, 27 Aug 2005 23:38:02 -0400 [thread overview]
Message-ID: <20050828033802.GA17080@redhat.com> (raw)
In-Reply-To: <43112214.7070203@gmail.com>
On Sat, Aug 27, 2005 at 09:31:48PM -0500, Patrick wrote:
> There is a problem with the display of CPU Frequency in /proc/cpuinfo.
> It displays the CPU Frequency correctly... until you change the speed
> manually with the kernel's frequency scaling. Before I do this, my
> frequency displayed in /proc/cpuinfo is: "3208.757", This is correct.
> Then I: "||echo 600000 /sys/devices/cpu/cpu0/cpufreq/scaling_setspeed"
> The file "scaling_setspeed" shows 600000, which is correct. My CPU does
> change to that speed (I've run tests before and after, and temperature,
> etc), yet /proc/cpuinfo shows no change, no matter what clock speed I
> set it to.
> ....
> The modules that were modprobed at the time:
>
> p4_clockmod
p4 clock modulation doesn't actually change the cpu frequency.
> speedstep-lib
This is a support library used by the other speedstep libs.
(It's meant to be pulled in as a dependancy
rather than directly modprobed)
Your CPU isn't supported by the speedstep drivers, so loading
this is pointless.
> freq_table
support lib for p4-clockmod.
Dave
prev parent reply other threads:[~2005-08-28 3:38 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-08-28 2:31 Incorrect CPU Frequency in /proc/cpuinfo Patrick
2005-08-28 3:38 ` Dave Jones [this message]
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