实时分布式操作系统中共享对象通信模型的实现

THE IMPLEMENTATION OF A SHARED OBJECT COMMUNICATION MODEL IN REAL TIME ISTRIBUTED OPERATING SYSTEMS

与消息传递、远程过程调用和共享内存等进程间通信模型相比，在分布式存储多处理器上实现的共享对象模型能更自然、更高效地描述进程间的相互作用．它通过共享对象消除了各结点之间的物理边界，为系统提供了一种透明的分布式处理能力．这样，整个系统（包括硬件和软件）在逻辑上成为一个单系统．该模型已在仪器用弱实时分布式操作系统（ＩＯＷＲＴＤＯＳ）的全局共享对象（ＧＳＯ）层上实现．文中研究了共享对象通信模型，并详细讨论了实现中的关键问题．

Compared with the interprocess communication model of message passing, remote procedure call, and shared memory, a shared object model realized on a distributed memory multiprocessor can describe the interaction of processes more naturally and efficiently. It transcends the physical boundaries between the processor nodes by making use of a few global shared objects and presents the system with a transparent distributed processing capability. Hence, the entire system, both hardware and software, can be viewed logically as a single system. This model has been implemented on the globally shared object (GSO) layer of the instrument oriented weak real time distributed operating system (IOWRTDOS). The shared object communication model is explored and several key issues of implementation are disussed in detail.