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Multi-core scheduling method for high utilization task set oriented soft real-time system

A scheduling method and task collection technology, applied in the field of multi-core scheduling of soft real-time systems

Active Publication Date: 2019-02-01
XIAN TECHNOLOGICAL UNIV
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Problems solved by technology

[0003] This application provides a multi-core scheduling method for a soft real-time system oriented to a high-utilization factor set, which solves the real-time scheduling problem of periodic tasks in a soft real-time system in which all tasks belong to a high-utilization factor set under an embedded multi-core platform, reducing In the existing technology, there are task switching overhead and context switching times due to migration

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  • Multi-core scheduling method for high utilization task set oriented soft real-time system
  • Multi-core scheduling method for high utilization task set oriented soft real-time system
  • Multi-core scheduling method for high utilization task set oriented soft real-time system

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Embodiment Construction

[0026] The present invention will be further described in detail below through specific embodiments in conjunction with the accompanying drawings. Wherein, similar elements in different implementations adopt associated similar element numbers. In the following implementation manners, many details are described for better understanding of the present application. However, those skilled in the art can readily recognize that some of the features can be omitted in different situations, or can be replaced by other elements, materials, and methods. In some cases, some operations related to the application are not shown or described in the description, this is to avoid the core part of the application being overwhelmed by too many descriptions, and for those skilled in the art, it is necessary to describe these operations in detail Relevant operations are not necessary, and they can fully understand the relevant operations according to the description in the specification and genera...

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Abstract

The invention relates to a multi-core scheduling method of a soft real-time system oriented to a high utilization rate task set. The method includes, aiming at the real-time parameters of periodic tasks in soft real-time system based on embedded multi-core platform, calculating utilization rate for all tasks, according to the task utilization ratio, the basis of judging that the task belongs to high utilization factor set is given, finding a set of tasks that satisfy the full utilization of more than two processors. Then the tasks in the set are scheduled in real time, and the real-time periodic tasks in different sets are assigned to processor cores of different groups to execute, and the priority order of tasks is defined, and then the real-time periodic tasks are scheduled according tothe corresponding real-time scheduling process. The invention not only minimizes the mobility of the task, but also has high utilization rate of the system processor core.

Description

technical field [0001] The invention belongs to the field of embedded system multi-core technology, and in particular relates to a multi-core scheduling method for a soft real-time system oriented to a high-utilization rate task set. Background technique [0002] Based on multi-core embedded system software, process scheduling strategy is one of the key technologies. How to design a suitable scheduling algorithm under the multi-core platform, so that it can not only meet the real-time and security requirements of key tasks, but also make full use of the powerful computing power provided by the multi-core is the focus of current research. However, static fixed-priority real-time scheduling algorithms based on single cores, such as RMS (Rate-monotonic Scheduling) and DMS (Deadline Monotonic Scheduling), and dynamic priority scheduling algorithms such as EDF (Earliest Deadline First) and MLF (Minimum Laxity First) although All have been proved to be relatively excellent schedu...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F9/48
CPCG06F9/4881
Inventor 黄姝娟朱怡安刘白林乔奎贤张雅
Owner XIAN TECHNOLOGICAL UNIV
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