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Method and system of embedded type system task energy-saving scheduling based on dynamic voltage scaling

A technology for dynamic voltage regulation and embedded systems, applied in the field of energy-saving scheduling of embedded system tasks

Inactive Publication Date: 2013-06-26
HUNAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, so far, there is still no effective technological breakthrough in improving battery performance, and it is necessary to propose an embedded system task scheduling method and system based on dynamic voltage regulation to overcome existing problems

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  • Method and system of embedded type system task energy-saving scheduling based on dynamic voltage scaling
  • Method and system of embedded type system task energy-saving scheduling based on dynamic voltage scaling
  • Method and system of embedded type system task energy-saving scheduling based on dynamic voltage scaling

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Embodiment Construction

[0032] The present invention will be further described below in conjunction with accompanying drawing.

[0033] The basic idea of ​​the energy-saving scheduling method for embedded system tasks based on dynamic voltage adjustment proposed by the present invention is to maintain a ready task queue in the system that decreases according to the task priority, and the scheduler reads tasks from the head of the ready queue each time for scheduling. At the same time, when the task arrives, the task ends, or the task cycle ends, the scheduler will calculate the main frequency adjustment factor according to different situations, and dynamically adjust the voltage so that the processor can perform tasks at an appropriate main frequency. Initially, the task queue is empty and the processor is in a dormant state. When a task arrives, the processor starts and executes the task at the main frequency specified by the scheduler; when the task execution is completed, the scheduler slightly red...

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Abstract

The invention discloses a method and a system of embedded type system task energy-saving scheduling based on dynamic voltage scaling. Aiming at the lack of a task scheduling method which is universally applicable from periodic task to accidental task and effectively reducing energy consumption, a double-target task scheduling method capable of meeting task instantaneity and minimizing energy consumption is designed based on unified and comprehensive consideration of the nature of dynamic voltage scaling energy consumption contradicting instantaneity. Based on an existing dynamic voltage scaling technology, a scheduler responds when task execution status is switched through an event-driven task scheduling method, and dominant frequency is adjusted to the most energy-saving, but task instantaneity level can be guaranteed. Therefore, energy consumption of an embedded type system when executing tasks is reduced comprehensively and effectively, task instantaneity is met, and complexity of the method is low.

Description

technical field [0001] The invention relates to an embedded system task energy-saving scheduling method and system based on dynamic voltage regulation. Background technique [0002] With the development of embedded technology, the functions of embedded devices, such as MP3, GPS navigation, and mobile phones, are becoming more and more complex. The number of transistors integrated on a chip of the same size is increasing by orders of magnitude, so the energy consumption is also increasing. The battery technology is far behind the development speed of the processor. Therefore, the energy consumption problem has become a very important problem in the current embedded devices. In embedded devices, the task execution time is not fixed, but its completion has a certain time limit. Therefore, in traditional embedded system design, in order to strictly meet the real-time performance of different tasks, the system usually executes tasks at the fastest main frequency. Under the sa...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F1/32G06F9/50
CPCY02D10/00
Inventor 梅晶李肯立郑伟华徐雨明唐卓肖正
Owner HUNAN UNIV