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中文摘要：
研究了虚拟仪器软件系统的运行性能。应用Petri网建模工具,建立组件模型,并分别针对串行顺序过程、多输入过程、多输出过程,建立同步和异步模式下的系统模型,生成可达图,并据以研究吞吐率和延迟两大性能指标。结果显示,利用异步组件实现的流水线模式能够大幅度的减少周期时间,提高吞吐率;瓶颈步骤的位置较大程度地影响着延迟,位置越靠后,延迟越大;输入缓冲对性能指标没有正面作用,应该避免使用。最后给出了2个实验,验证了性能指标计算方法的正确性。
英文摘要：
This paper investigates the operational performance of virtual instrumentation software system.We apply the Petri net modeling tool to build component level model,and build synchronous and asynchronous dy-namic system models for sequential process,multi-input process and multi-output process.We establish reachable marking graphs and apply them to investigate throughput and delay performances.Results show that the pipeline mode realized with asynchronous component can drastically reduce the cycle time,and then improve the throughput.The position of the critical component affects delay performance greatly,the latter the position is,the greater the effect will be;the input buffer shows no positive effect on the performance and its usage should be avoided.At the end,two experiments are given,which validate the correctness of the performance computing method.
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