Real-time power meter for optimizing processor power management

A machine-readable storage media having machine-readable instructions stored thereon, that when executed, cause one or more machines to perform an operation comprising:

• determining a throttle frequency according to according to a watermark and after a voltage level of a power supply crosses a threshold;
• proportionally throttling one or more processor cores with the throttle frequency;
• and
• disabling the operation of proportionally throttling once the voltage level of the power supply no longer crosses the threshold.

A system comprising:

• a memory;
• a processor coupled to the memory, wherein the processor comprises:
• a power detector to detect when a voltage level of a power supply crosses a threshold, and to save a watermark indicative of a minimum voltage level of the power supply;
• one or more processor cores;
• and
• a power control unit (PCU) communicatively coupled to the power detector, wherein the PCU is to proportionally throttle the one or more processor cores according to the watermark and after the voltage level crosses the threshold;
• and
• a wireless interface to allow the processor to communicate with another device.