Analysis on task scheduling operating mechanism of embedded real-time operating system MQX

The performance of task scheduling is one of the key factor that affects embedded real-time operating system´s performance. This paper describes the realization mechanism of priority-based preemptive scheduling of MQX and the simple and efficient scheduling process of MQX based on in-depth analysis on task scheduling source code starting from MQX task descriptor, task template and data structure of task array and finally makes a comparison with μC/OS-II and makes a conclusion of fast execution speed of interrupt response and less time of context switch in MQX. This paper lays a foundation for the application and development and further in-depth research of MQX.