PROCESSOR, INFORMATION PROCESSING DEVICE, AND CONTROL METHOD OF PROCESSOR

摘要

PROBLEM TO BE SOLVED: To keep a temperature of a processor within a temperature range in which the processor is guaranteed to normally operate while minimizing the drop in its performance.

SOLUTION: A heat evolution value estimating part 110 obtains the number of subprocessors under operation and the present operational frequencies, and estimates the heat evolution value after a period of timeΔt. A temperature control part 120 estimates a temperature after a period of timeΔt based on the present temperature inputted from a temperature sensor 400 and the estimated heat evolution value, and compares it with a prescribed threshold value temperature. When the temperature reaches a prescribed threshold value temperature, the temperature control part 120 obtains the number of subprocessors, which can be used in parallel after a period of timeΔt, from a task management part 121, and finds transitional operation points by referring to a performance table 122. A subprocessor control part 130 and a frequency control part 140 change the number of operations of the subprocessors and the operational frequencies in accordance with the operation points. The transitional operation points are described in order of performance in the performance table 122.

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