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DVFS - modifying the processor voltage

priyagps
Beginner
‎10-22-2009 01:16 PM
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Hello,
I am using cpuspeed daemon (userspace module ) to modify the processor frequency of my processors. Does this automatically
scale down or scale up the voltage too? Or is there a separate command to modify the voltage of a processor?
If so, what is it?

I have Xeon 5520 Nahelem processor. and OS is CentOS 5.3.

Regards,
Priya
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Intel_Software_Netw1
Beginner
‎10-23-2009 05:43 PM
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We asked our engineering contacts, who responded that voltage changes are automatically built into processor performance states. Also, the Linux* cpufreq "userspace" governor and the cpuspeed daemon have been obsolete for several years, having been replaced by the "ondemand" in-kernel governor.

Our contacts also recommend that you join the linux-acpi@vger.kernel.org mailing list to receive support for Linux*/ACPI-related issues.

==
Lexi S.
Intel Software Network Support
http://www.intel.com/software
Contact us: http://www.intel.com/cd/ids/developer/asmo-na/eng/58987.htm

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