Method and device for managing central processing unit

Abstract

Embodiments of the invention disclose a method and a device for managing a central processing unit. Implementation of the method comprises the following steps of determining a first prediction condition and a second prediction condition, wherein the first prediction condition and the second prediction condition are both factors for influencing the wake-up time of the central processing unit (CPU); counting the accuracy for using the first prediction condition to predict the CPU to enter a low power mode (LPM); if the accuracy is higher than a predetermined threshold, continuing to use the first prediction condition to predict the next wake-up time of the CPU; otherwise using the second prediction condition to predict the next wake-up time of the CPU. When the prediction condition is utilized to predict the next wake-up time of the CPU, the influences of various factors on the next wake-up time of the CPU are considered simultaneously, and the next wake-up time of the CPU can be more accurately predicted, so that the CPU can select more appropriate PLM (Product Lifecycle management), and thus the power consumption and performance requirements of the CPU are considered; therefore, the higher CPU performance can be kept on the premise of keeping the low power consumption.

Description

technical field [0001] The invention relates to the technical field of computers, in particular to a management method and device for a central processing unit. Background technique [0002] In currently widely used operating systems, when a task is running on the central processing unit (Central Processing Unit, CPU), the CPU will be in the active state, and when the task is completed or removed, the CPU will enter a low power state. Low Power Mode (LPM), including different LPMs such as wait for interrupt (WFI), sleep mode (Suspend) or power-down mode (Power collapse); different LPMs correspond to different CPU response times and power consumption levels. [0003] For example: under WFI, the CPU responds quickly but consumes a high level of power consumption, while in the power collapse state, the CPU responds very slowly but consumes the lowest power consumption. The CPU is in the running state for a long time, which can ensure better running performance, but will incre...

AI Technical Summary

Problems solved by technology

[0009] Therefore, the current CPU low-power mode selection scheme has relatively large limitations, and cannot maintain high CPU performance while maintaining low power consumption.

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