Power measurement apparatus and power measurement method

A power measurement apparatus of an information processing apparatus, the information processing apparatus including a plurality of logical units each including a CPU chip having a CPU core and a peripheral apparatus at least including a memory, a dedicated power supply apparatus that supplies a power supply voltage to the respective CPU cores, and a common power supply apparatus that supplies a power supply voltage to the peripheral apparatus of the plurality of logical units, the power measurement apparatus comprising:

• a memory;
• a processor, being accessible to the memory, that executes a process including,
• acquiring an output voltage and an output current of the dedicated power supply apparatus and generating output power of the dedicated power supply apparatus;
• acquiring a temperature of the CPU chip;
• generating an operation rate of the CPU core from a first power consumption coefficient which is independent of the operation rate of the CPU core and a second power consumption coefficient which is dependent on the operation rate of the CPU core and which are coefficients with respect to the temperature of the CPU chip and also from the output power;
• estimating power consumption of the peripheral apparatus of the first logical unit from the first power consumption coefficient and the second power consumption coefficient which are coefficients with respect to a temperature of the peripheral apparatus of the first logical unit and also from the operation rate of the CPU core of the first logical unit, and estimating power consumption of the peripheral apparatus of the second logical unit from the first power consumption coefficient and the second power consumption coefficient which are coefficients with respect to a temperature of the peripheral apparatus of the second logical unit and also from the operation rate of the CPU core of the second logical unit;
• and
• generating respective power consumption of the first and second logical units by summing up the output power of the dedicated power supply apparatus and the estimated power consumption of the peripheral apparatus for each of the first and second logical units.