Real time power managing method and its system

A power management system and power management technology, applied in the direction of data processing power supply, etc., can solve the problems that the system cannot accept the interrupt service of the main control operation, the discount of power saving effect, and the inability to reflect the real execution status of the hardware in real time, etc.

Active Publication Date: 2005-03-02
VIA TECH INC
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AI Technical Summary

Problems solved by technology

For example, when the central processing unit 114 enters the C3 sleep state, the content of the central processing unit 114 is not saved, the cache cannot maintain consistency, and the system cannot accept master control operation (Master) and interrupt service
When the master control request and interrupt request occur, it will resume operation, but it is very time-consuming
Because all the power saving status of the hardware is determined by the software, it cannot reflect the real execution status of the hardware in real time, so the power saving effect is also greatly reduced

Method used

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  • Real time power managing method and its system
  • Real time power managing method and its system
  • Real time power managing method and its system

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Embodiment Construction

[0028] Since the south bridge chipset is the key to controlling the frequency and voltage of the entire system, and the electronic circuit can control power consumption as long as these two elements are mastered, so as long as the south bridge can automatically control the system frequency accurately and in real time according to the system usage rate And voltage, the natural system can efficiently control the power of the system. And because these controls are all initiated by the South Bridge, the real-time performance is far better than that of software, and the control is closer to the real application of the system. In addition, since the current south bridge control system uses the system management bus (SMBUS) communication protocol, it takes at least 300μS for a command in this way (assuming that the clock is 100KHz and it takes 30 bits to write). If the voltage and frequency are controlled at the same time, it will take about 1ms to complete. The present invention pr...

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Abstract

It is a real time power supply management system and method which is used to quickly adjust computer system's power expenditure. The north bridge chip detects system's executive state and according to this detect the south bridge chip quickly adjusts inner component's voltage and frequency by transmitting corresponding control signal to a controller through a set of sideband signal lead. In this system the sideband signal lead replaces the SMBUS. It is a quicker and real-time electricity-saving mechanism.

Description

technical field [0001] The invention relates to a method for power management of a computer system, in particular to a system and a method for replacing the ACPI system management bus (SMBUS). Background technique [0002] In today's computer systems, power saving has always been an important issue. Especially on mobile computers that use batteries as the main power source, it is even more critical. The power management specifications implemented by today's computer systems are mainly derived from the Advanced Configuration and Power Interface (ACPI) specification. Its structure is as follows Figure 1a shown. [0003] ACPI is a specification for the mutual matching of software and hardware. The principle of power saving is that the operating system detects the operating status, and through the software driver, sends commands according to a specific communication protocol, so that the hardware can reduce the operating voltage and frequency according to the design, so as t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F1/32
Inventor 钟健平黄宗庆王景容
Owner VIA TECH INC
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