| With the development of digital information technology, ERTOS(Embedded Real-Time Operating System) not only has involved in the scientific research and engineering domains,but also has many affinities people's life. Real-Time performance is the most important performance of Embedded Operating System. It needs dispatching all available resources to achieve real-time task. In order to correctly evaluate the performance of a real-time Embedded Operating System, we must be scientific, systematic approach to ERTOS study of Real-Time performance and comprehensive Real-Time performance and accurate testing.Firstly,This article has researched on the Embedded Operating System for hard Real-Time implementation of the system architecture, task-mode, memory management and interrupt management to implement mechanism; this article has analysed the Real-Time performance target.Secondly this article has analysed the source code of VxWorks kernel depthly and a global dynamic scene of a running VxWorks kernel has been shown. This article has analysed the data structure, discovered the relationship of the data structure and shown the processes of the task rescheduling, the communications, the kernel depriving and the allocation of memory in the Operating System. This article has also analysed the defer work mechanism.This article has proposed a method to measure Real-Time performance, through the use of new method and Rhealstone method respectively has tested the task switching time and deadlock breaking time, description the measured data of this method has more realistic, more in line with the Real-Time system the actual situation.Finally, This article has designed some reasonable test case.This article has tested the Real-Time performance indicators on the Operating System of VxWorks, This article obtained lots of test date. This article has analysed of test data, authentication the analysis of the real-time performance on the Operating System of VxWorks for this ariticle. |
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