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Performance Modeling of Softwarized Network Functions Using Discrete-Time Analysis

机译:基于离散时间分析的软化网络功能的性能建模

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The softwarization of networks promises cost savings and better scalability of network functions by moving functionality from specialized devices into commercial off-the-shelf hardware. Generalized computing hardware offers many degrees for adjustment and tuning, which can affect performance and resource utilization. One of these adjustments are the interrupt moderation techniques implemented by modern network interface cards and operating systems. Using these, an administrator can optimize either lower latencies or lower CPU overhead for processing of network traffic. In this work, an analytical model that allows computing relevant performance metrics like the packet processing time and the packet loss for generic virtualized network functions running on commodity hardware is developed. The applicability of the model is shown by comparing its outcome with measurements conducted in a local testbed featuring a VNF that acts as an LTE Serving Gateway (SGW). Based on this model, impact factors like the average packet interarrival time, the interarrival time distribution, and the duration of the interrupt aggregation interval are studied.
机译:通过将功能从专用设备转移到现成的商用硬件中,网络的软化有望节省成本并提高网络功能的可扩展性。通用计算硬件为调节和调整提供了许多程度,这可能会影响性能和资源利用率。这些调整之一是由现代网络接口卡和操作系统实现的中断缓和技术。使用这些,管理员可以优化较低的延迟或较低的CPU开销来处理网络流量。在这项工作中,开发了一种分析模型,该模型允许为在商用硬件上运行的通用虚拟化网络功能计算相关的性能指标,例如数据包处理时间和数据包丢失。通过将模型的结果与在具有LTE服务网关(SGW)功能的VNF的本地测试平台上进行的测量结果进行比较,可以显示模型的适用性。在此模型的基础上,研究了平均数据包到达时间,到达时间分布以及中断聚合间隔的持续时间等影响因素。

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