CPU frequency reduction method and system and portable computer

Abstract

The invention discloses a CPU frequency reduction method. The method is applied to a portable computer in a battery mode. A first current threshold value used for requesting a CPU to execute preset frequency reduction operation and a second current threshold value larger than the first current threshold value and used for requesting the CPU to execute fundamental frequency operation are set in thesystem, and the CPU is requested to execute the preset frequency reduction operation by reducing the peak power threshold value of the CPU. The invention further discloses a CPU frequency reduction system for executing the CPU frequency reduction method and a portable computer comprising the CPU frequency reduction system. The beneficial effects of the invention are that: when the discharge current of the battery is continuously increased; a first current threshold used for requesting to reduce a peak power threshold of a CPU and a second current threshold used for requesting the CPU to execute fundamental frequency operation are set; therefore, the CPU firstly performs the preset frequency reduction operation and then reduces to the fundamental frequency, so that the CPU does not frequently reduce to the fundamental frequency to work, and the phenomenon that the portable computer is jammed due to the fact that the CPU frequently enters a fundamental frequency operation mode can be avoided.

Description

【Technical field】 [0001] The invention relates to the technical field of computers, in particular to a CPU frequency reduction method, system and portable computer. 【Background technique】 [0002] With the advancement of technology and the development of technology, portable computers such as notebooks are becoming more and more popular, and users have higher and higher requirements on the performance of notebooks. In the actual application process, due to the low voltage and power of the battery and the low power of the adapter, when the notebook is powered by the battery, the discharge current of the battery will be too large, resulting in a large voltage drop at the input end of the battery system, which will easily cause the CPU to fail. The voltage is too low to shut down forcibly. For this reason, the current threshold is usually set in the system. When the discharge current of the battery reaches the current threshold, the CPU is lowered to the base frequency to reduc...

AI Technical Summary

Problems solved by technology

In the actual application process, due to the low voltage and power of the battery and the low power of the adapter, when the notebook is powered by the battery, the discharge current of the battery will be too large, resulting in a large voltage drop at the input end of the battery system, which will easily cause the CPU to fail. The voltage is too low to shut down forcibly. For this reason, the current threshold is usually set in the system. When the discharge current of the battery reaches the current threshold, the CPU is lowered to the base frequency to reduce the discharge current of the battery. However, this makes the notebook in battery power mode. It will frequently reduce the CPU to the base frequency, causing the notebook to freeze, and affecting the performance of the notebook in battery mode

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