一种高效RTAI共享内存管理层的研究与实现

摘要

Aiming at Shared memory problems of CNC system based on RTAI extension with domestic Loongson CPU, study the RTAI shared memory mechanism, shared memory pool and memory block two-grade management data structure is taken, on the encapsulation of RTAI shared memory allocation and release functions, design allocation algorithm and the release algorithm, achieve a high efficient management of the shared memory with C language. Experimental results show that the method is effective to reduce CNC system' s the shared memory allocation and release time-consuming, and improves CNC system' s shared memory management efficiency.%针对基于国产龙芯CPU的RTAI扩展的数控系统的共享内存问题,通过对RTAI共享内存实现机制的研究,设计共享内存池和共享内存块两级管理数据结构,在RTAI提供的共享内存分配和释放函数的基础上,设计了一种分配算法和释放算法,并使用C语言实现一个高效的共享内存管理层.经验证,该设计有效降低了数控系统共享内存分配和释放的时间耗费,提高了数控系统的共享内存管理效率.