control register address for controlling DVFS

[NKala1]

Hi ,

May I know which system register (I am using a core 2 duo E8400) should be used to control the possible voltage/freq settings for DVFS. I am not trying to over clock the cpu. I am trying to select one of the pairs of available voltage/freq combinations. ACPI drivers do it save power during idle periods. I went through manual vol 2 and 3 and was able to read performance registers using rdmsr/wrmsr commands. But, I was not able to find the address of the control register that can control the DVFS settings.control register

Thanks,

Nanda

[Jose_H_Intel1]

Since your question is related to programming we encourage you to post it in this forum:

http://software.intel.com/en-us/forums/software-tuning-performance-optimization-platform-monitoring http://software.intel.com/en-us/forums/software-tuning-performance-optimization-platform-monitoring