a question about p4_clockmod module on Xeon quad core processors

[Landreth, Kevin]

P4-clockmod only changes the speed, not the frequency.  It's a heat
reduction mod, not a power consumption one.  I have a 3065 processor
that has the same "problem" when you install acpi-tools, you find out
that the processor is only capable of two different frequencies.

- Kevin Landreth

-----Original Message-----
From: linux-poweredge-bounces at dell.com
[mailto:linux-poweredge-bounces at dell.com] On Behalf Of Xiaoning Ding
Sent: Wednesday, January 28, 2009 1:02 PM
To: linux-poweredge at dell.com
Subject: a question about p4_clockmod module on Xeon quad core
processors

Has anyone tried the p4-clockmod module to scale frequencies of Xeon
quad-core processors? 

I have 2 Xeon 5355 processors and want to scale down their frequencies
for some experiments. I have tried the acpi-cpufreq module. But it can
only scale down the frequence from 2.67GHz to 2GHz. Does anyone have
experience with the p4-clockmod module to get even lower frequencies
with Xeon quad core processors?

Thanks!

Xiaoning


      

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