I have a Xeon 5500 with Linux installed on it and I wish to use the ondemand cpufreq governor to save power consumption of the server.
I had questions about the cpufreq software:
1. The cpufreq governor (on demand) shows /sys entries, one of which is from /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq. Does this file contain only the available frquencies or even the voltages ?
Does the cpufreq software allow to modify both voltage and frequency or only frequency.
I could not locate the available voltages and how we can change them.
Does the processor driver (speed-step) automatically choose the voltage level for a frequency ?