Processor power measurement

A system comprising:

• a processing core configured to execute machine readable instructions;
• and
• memory accessible by the processing core, wherein the memory includes preprogrammed test data that characterizes one of an impedance of a processor and a current output to the processor during execution of a test routine, wherein the processor includes the processing core, wherein the one of the impedance of the processor and the current output to the processor is based on a power measurement taken during execution of the test routine, wherein the power measurement is taken with a current sensor that is at least one of lossy or at least about 98% accurate, further comprising:
• a voltage core regulator comprising a substantially lossless current sensor, the voltage core regulator being configured to:
• provide power to the processor;
• and
• output data that characterizes a real-time current output to the processor by the voltage core regulator, wherein the memory further comprises:
• a power test configured to:
• determine a calibration factor for the processor based on the test data and the real time current provided to the processor;
• and
• determine a calibrated power consumed by the processor based on the calibration factor and the real-time current provided to the processor.

A method comprising:

• executing a test routine on a processor that executes machine readable instructions;
• measuring, with a lossy current measuring device, a current provided to the processor during the test routine, wherein the test routine comprises a plurality of machine readable instructions;
• storing test data that characterizes the measuring in a memory;
• generating a calibration factor used during normal operation of the system generated accurate processor current measurement without need for a lossy current sensor.

A data center comprising:

• a plurality of computers that are each configured to store a power history, wherein a given power history of a given computer of the plurality of computers comprises a time-stamped instance of a calculated power consumed by the given computer;
• wherein the calculated power is based on a real-time measured current provided to the given computer and a calibration factor;
• wherein the calibration factor is based on test data characterizing one of an impedance of a processor of the given computer and a current provided to the processor of the given computer during execution of a test routine by the processor;
• and
• a data center controller configured to adjust a workload assigned to each of the computers based on the power history of each of the computers.