基于RT-Linux的数控系统进程间通信方式的研究

Research of InterProcess Communication Mechanism in RT-Linux-based CNC

为了提高数控系统进程间的通信性能,提出一种用于用户空间进程和内核空间进程间高效通信的方法,该方法有机结合了RT-Linux提供的mbuff和实时FIFO,可有效减少数据拷贝,并彻底避免对是否有新数据到来的轮询监测等额外操作,从而获得较高的通信效率.已在我们开发的数控系统中得到实际应用,取得了满意的效果.

This paper presented a new method of communication between kernel process and user process to improve the performance of interprocess communication in CNC. The method reduces message data copying and shared memory operations greatly, depending on strongpoints of real time FIFO and shared memory. The proposed has been used in the CNC that we developed.