CPU control method and apparatus for improving application processing speed and power consumption

A CPU control apparatus for controlling a CPU, the CPU control apparatus comprising:

• a processor;
• and
• a memory storing one or more programs configures to be executed by the processor, the one or more programs comprising instructions for:
• (a) measuring a reaction time of a user terminal for a running application;
• (b) computing a first reaction time by stepwise changing a CPU frequency if the reaction time exceeds a preset threshold;
• (c) computing a second reaction time by stepwise changing a processing weight of the application if the first reaction time exceeds the preset threshold;
• and
• (d) repeating said step (c) if the second reaction time exceeds the preset threshold,
• (e) adjusting the CPU frequency and the processing weight of the application based on the changed CPU frequency and the changed processing weight that correspond to the second reaction time that does not exceed the preset threshold,
• wherein the step (a) computes the reaction time of the user terminal by the following equation,
• TR(fx, n*y)=TR(fCPU, n*)+ΔR
• wherein the step (b) and step (c) compute change of the first reaction time and the second reaction time by the following equation in order to compute the first reaction time and the second reaction time,
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• TR (fx, n*y) represents a predictive reaction time, TR (fCPU, n*) represents a reaction time measured by a reaction time measurement part, fcpu is the value of the current CPU frequency, fx represents the value to which the CPU frequency will be changed, wi represents the value of the processing weight of application i, w* represents the value of the processing weight of the target application, and w*y represents the value to which the processing weight of the target application will be changed, Ts is a service time of the running application, S represents the set of tasks being processed by the CPU, excluding the target application, and ΔR represents change of the first reaction or the second reaction time.