Patent ID: 8661276

Claim:
A power control method of a Central Processing Unit (CPU) in a multi-core system including a plurality of cores, the power control method comprising the steps of: acquiring, by a control unit, current usage information of the CPU and system information; estimating, by a usage estimation unit, a CPU usage of a next time interval based on the acquired current usage information; calibrating, by a usage calibration unit, the estimated CPU usage of the next time interval using a variable threshold, the variable threshold being determined according to the acquired system information, the acquired system information indicating an operation state of the multi-core system; and determining, by a mode selection unit, a power control mode based on at least one of the acquired system information and the calibrated CPU usage of the next time interval, wherein the power control mode includes a first power control mode to control powering on/off of at least one of the plurality of cores.