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Magnetic disk dynamic power supply management method based on embedded system

A dynamic power management, embedded system technology, applied in the direction of data processing power, etc., can solve the problems of no research on disk dynamic power management and few algorithms.

Inactive Publication Date: 2009-01-14
SOUTH CHINA UNIV OF TECH
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Problems solved by technology

[0004] At present, foreign research on DPM mainly focuses on the theoretical research of the DPM algorithm, and relatively little is involved in the specific implementation of the algorithm on specific devices; most of the domestic implementation of the DPM algorithm is based on the CPU as the research object, and the dynamic power management of the disk. little research

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  • Magnetic disk dynamic power supply management method based on embedded system
  • Magnetic disk dynamic power supply management method based on embedded system
  • Magnetic disk dynamic power supply management method based on embedded system

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with the accompanying drawings.

[0020] In order to control the state of the disk and read and write data on the disk, the present invention must use a disk controller. The disk controller is a logical interface circuit between the CPU and the drive. It receives request commands from the CPU and sends seek, read / write, and control signals to the drive, such as figure 1 shown.

[0021] The interaction process between the kernel and the disk controller is to set the relevant register content in the controller through the I / O port, and obtain the result information of the operation through the register.

[0022] The host computer controls the IDE interface disk through two sets of registers on the disk controller. One group is the command register group (Task File Registers), the I / O port address is 1F0H ~ 1F7H, its function is to transmit commands and command parameters, the other group is the control...

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Abstract

The invention provides an embedded system based dynamic disc power management method, which divides the state of a disc on a dynamic power management structure by expanding magnetic disc power management on the dynamic power management structure and sets contents in a command register of a disc controller by reading and writing I / O ports so that the magnetic disc is switched from a high power consumption state to a low power consumption state. The invention provides a method for changing disc state based on reading and writing the disc register and also a method for acquiring disc loading by reading and writing I / O requests; in addition, the invention realizes disc strategy optimization by using a renewed theory model algorithm and verifies the favorable performance thereof by experiments. Therefore, a method for realizing dynamic disc power management is completely provided.

Description

technical field [0001] The invention belongs to the field of dynamic power management of embedded systems, in particular to a disk dynamic power management method based on embedded systems. technical background [0002] Embedded systems are application-centric, computer-based, software-hardware tailorable, and application-specific computer systems that have strict requirements on function, reliability, cost, volume, and power consumption. The biggest feature of embedded systems is that they are purposeful or targeted, that is, embedded systems are developed to meet the needs of a specific field, so they are often limited by space, cost, storage and other conditions. This also determines that the embedded system has more stringent requirements than other computer systems in terms of real-time performance and power consumption. Since embedded systems often use batteries as the power supply facility for the entire system, it is necessary to provide better power management meas...

Claims

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Application Information

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IPC IPC(8): G06F1/32
Inventor 刘发贵吴泽祥麦伟鹏
Owner SOUTH CHINA UNIV OF TECH
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