DVFS is concept of tuning voltage and frequency of CPU processor dynamically as per workload scenarios.
In my knowledge, cpufreq is used to tune CPU frequency dynamically depending on selected governors.
I need some guidance in this context for Ubuntu 18.04.
  1. Why ondemand and conservative governors are not listed to /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_governors? Can it be avail using any configuration? How?
  2. Why scaling_Available_Frequencies file not present to cpufreq folder?
  3. I need set of available CPU frequency and its associated voltage
  4. How to tune voltage for DVFS assignment?