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建立主—从分布式多机系统的随机Ｐｅｔｒｉ网模型，并用此模型分析系统性能。揭示了系统性能与主、从机之间通信机制选择有关：当主、从之间“进入通信”变迁速率较快时，处理机平均利用率较高。对不同类型的主—从多机系统宜于选择何种通信方式作了一定探讨，并指出对于实时监控系统，宜采用主机向下查询方式进行通信
Establish a master - from stochastic Petri net model of distributed multi-machine system, and use this model to analyze system performance. Reveals that the system performance is related to the choice of the communication mechanism between the master and the slave. When the transition rate of “entering the communication” between the master and the slave is high, the average utilization rate of the processor is relatively high. It is discussed that different types of master-slave multi-machine systems are suitable for choosing which communication mode, and points out that for the real-time monitoring system, it is better to use host down communication mode