A method of dynamically scaling a power level of a microprocessor is provided. The method includes: receiving a plurality of workload rates of a microprocessor in a first duration period; determining a second duration period by adjusting a length of the first duration period; calculating a period workload rate based on the plurality of workload rates in the first duration period; dynamically scaling a power level of the microprocessor; and maintaining the scaled power level of the microprocessor in the second duration period.