Power-supply saving method and system for central processing unit

Abstract

An energy-saving method of central processing unit includes driving central processing unit to depart from dormant state of non-snoop event by system chip and entering a processing state for executing command as well as entering a system management mode when said unit is in dormant state of non-snoop event and requested event of bus bar main controller is sent out by peripheral device; then transmitting the requested event to control processing unit by arbitrator, driving said unit to be at dormant state of non-snoop event by closing arbitrator and executing an interruption program in system management after the requested event is processed .

Description

technical field [0001] The invention relates to a method and system for saving power, in particular to a method and system for saving power of a central processing unit, so as to save the power of the central processing unit. Background technique [0002] Along with the advancement of computer (computer) system technology, the function that computer system possesses is more and more powerful and comprehensive, and because of this, it brings quite a lot of convenience to the people today. Today's computer systems are not only able to help people handle affairs but also provide people with entertainment because they have developed towards the direction of multimedia services. Nowadays, the functions of computer systems are becoming more and more powerful and comprehensive, and the processing speed of the central processing unit is also increasing day by day, so the power consumed by the central processing unit is also increasing day by day, which is an important issue for port...

AI Technical Summary

Problems solved by technology

[0009] The main purpose of the present invention is to overcome the defects of the existing power saving method and system of the central processing unit, and provide a new power saving method and system of the central processing unit. The technical problem to be solved is to make the central processing unit When the processing unit is in the sleep state where events cannot be peeked and the peripheral device sends a bus master request event, it leaves the sleep state where events cannot be peeked and enters a processing state for executable instructions and enters a system management mode to process the bus master. The controller requests an event, and after the processing is completed, the central processing unit executes the system management interrupt program in the system management mode to drive the central processing unit to return to the dormant state where the event cannot be peeped, so as to achieve the best power saving purpose, which is more suitable for practical

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