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Method for setting device power management state and method for saving device power consumption

A technology of power management and power status, applied in the direction of data processing power, etc., can solve the problem of increasing energy consumption of computer systems

Active Publication Date: 2011-11-30
VIA TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in most cases, the device has no work to process but waits for the processor to wake up, which undoubtedly increases the power consumption of the computer system

Method used

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  • Method for setting device power management state and method for saving device power consumption
  • Method for setting device power management state and method for saving device power consumption
  • Method for setting device power management state and method for saving device power consumption

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Embodiment Construction

[0017] According to the (Advanced Configuration and Power interface; ACPI) technical specification, the power management states of a central processing unit (CPU) include: a normal operating state C0 and a sleep state C1, C2, C3 and C4. When the temperature of the CPU is too high, the CPU may enter a throttling (Throttling) state C0t to reduce the energy consumption of the CPU. ACPI also defines device power management states D0, D1, D2, and D3, where D0 is the normal operating state, D3 is the power-off state, and D1 and D2 are customizable power-saving states. And when the CPU enters the throttling state C0t or sleep state, the device can only wait for the CPU to wake up after completing its work. In a computer system platform conforming to the ACPI power management standard, a power management unit (PMU) module that communicates with the CPU and the device controller circuit is usually provided in the south bridge chipset. The PMU module can know that the CPU enters other ...

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Abstract

The present invention provides a method for setting the power management state of a device and saving power consumption of the device, which is suitable for a computer system conforming to the Advanced Configuration and Power Interface (ACPI) power management standard, which includes: providing a PMU module, and the PMU module can obtain Multiple different power management states of the CPU of the computer system, and an identification signal of a corresponding power management state of the device is set in the PMU module according to the obtained different power management states of the CPU. The devices of the computer system can enter different power management states according to the detected identification signal of the power management state, thereby reducing the power consumed by the computer system during normal operation.

Description

technical field [0001] The present invention generally relates to a method for setting a power management state of a device and a method for saving power consumption of a device in a computer system, and more particularly relates to a computer system that complies with the Advanced Configuration and Power Interface (ACPI) power management standard according to the processor and The relationship between the device controller to set the method of low power state of the device and the method of power saving of the device. Background technique [0002] Computer system is one of the most important hardware infrastructures in modern information society. In addition to the pursuit of performance, modern computer systems also need to pay attention to the reduction of energy consumption. Therefore, modern computer manufacturers also regard reducing energy consumption as one of the key points in the research and development of computer systems. [0003] Advanced Configuration and Po...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F1/32
Inventor 尹伟
Owner VIA TECH INC