Usage

Run as a super user e.g. root

1. check cpu status
   To check cpu information including frequency, voltage and power,run sudo ./cpued -c or sudo ./cpued --check
   Reading voltage and power is only supported on some intel platforms.
   example output:
   Family: 0x06 Model: 0x8e Threads: 4
Frequency: cpu0:700.073MHz cpu1:700.000MHz cpu2:699.986MHz cpu3:700.036MHz
Voltage: 0.640869v Power:3.090210w
To read the offset voltage, use '-rv' or '--read_voltage'. It may cause potential damage to unsupported device.
   At present, showing voltage and power is only supported for some of the intel chips.

2. read offset voltage
   Warning: reading or writing offset voltage on device which do not support FIVR may cause potential problem To read the offset voltage, run sudo ./cpued -rv or sudo ./cpued --read_voltage
   example output:
   Core: -125.000000mv iGPU: 0.000000mv Cache: -125.000000mv Agent: 0.000000mv Analog: 0.000000mv

3. write offset voltage Warning: addjusting voltage may cause permanent damage to your hardware!
   To write a offset voltage, run sudo ./cpued -wv {device} {voltage}
   {device} can be core,cache,igpu,agent or analog
   The unit of {voltage} is mv.
   For example, to undervolt cpu core by -125mv, run
   sudo ./cpued -wv core -125
   On some platform, to make the offset voltage on cpu to take effect, writing to both core and cache is needed.

4. use script to save time The file cpued.sh is a script which be used to execute multiple commands.Warning: The file is only an example, which may not suit your mechine. Please change it for your own when needed To run it, execute chmod +x cpued.sh to make it executable. Afterwards, you can use sudo ./cpued.sh to execute it(no need to rerun chmod).

Future plan

• GUI
• Adjusting frequency or frequency plan
• Identify CPU that support undervolt by FIVR
• Auto set offset voltage when starting up
• More precise power monitor
• Make package into .deb,.rpm or .tar