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Scheduling method for built-in tasks of synchronous digital system devices

A technology of synchronous digital system and scheduling method, applied in the field of optical transmission

Inactive Publication Date: 2011-11-23
NANJING ZHONGXING XIN SOFTWARE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] If you use an absolute timer, from the attached Figure 1, it can be seen that when the function under the timer is executed, the timer counting will start at the same time as the function execution, then when the function code is executed, the remaining The time will be given to other tasks to execute. This period of time will not be a timing period. Its length is the timing period minus the execution time of the function block, so that the time for other tasks to be scheduled is determined by the execution time of the function block in the periodic task. decided, there is no guarantee of scheduling time for other tasks
May cause other tasks to not be executed in time and cause problems

Method used

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  • Scheduling method for built-in tasks of synchronous digital system devices
  • Scheduling method for built-in tasks of synchronous digital system devices
  • Scheduling method for built-in tasks of synchronous digital system devices

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Embodiment Construction

[0021] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0022] In this embodiment, in order to maximize the use of CPU resources, the periodically executed functions with high real-time requirements are placed under the high-priority relative timer, so that the real-time performance of this function can be guaranteed, because the high-priority The timer at the first level can time the time in real time, and when the time is up, the function block hanging below can be scheduled; at the same time, the feature of the relative timer is that the function block hanging below is restarted after the execution is completed, and the timing is restarted, so when the function block executes During the process, the relative timer will...

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Abstract

The dispatching method according to the invention for embedded tasks of a synchronous digital system includes the following steps: establishing a relative timer with predetermined timing period; hanging the tasks under the timer; and repeating processes of timing with the relative timer and performing the hanged tasks in sequence. With the invention, resource of the whole CPU is furthermost used,real-time performance of the periodic functional module is ensured, and execution time of other task dispatching is ensured without being influenced by execution time of code of the timer.

Description

technical field [0001] The invention relates to the field of optical transmission, and proposes a scheduling of embedded software application tasks of Synchronous Digital Hierarchy (SDH) equipment. Background technique [0002] With the continuous development of the entire communication field, people have higher and higher requirements for the reliability and operating efficiency of communication equipment, and also require cheaper and cheaper, so the cost control of communication equipment is highly required. Communication equipment under certain cost control provides limited resources for embedded software, such as CPU resources. However, with the increasing popularity and promotion of communication equipment, more and more functions are bound to occur. How to make full use of existing resources , will be an important topic. [0003] For SDH equipment, it is at the bottom of the entire communication link, and its importance, reliability, and efficiency are self-evident. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04Q11/04H04J3/16
Inventor 刘林
Owner NANJING ZHONGXING XIN SOFTWARE CO LTD