Performance Modeling of Linux Network System with Open vSwitch

Performance Modeling of Linux Network System with Open vSwitch
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使用 Open vSwitch 的 Linux 网络系统性能建模

DOI:
10.1007/s12083-019-00723-5
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发表时间:
2019-02
影响因子:
4.2
通讯作者:
Vojislav B. Mišic
Vojislav B. Mišic
中科院分区:
计算机科学4区
文献类型:
--
作者:
Runkai Yang;Xiaolin Chang;Jelena Mišic;Vojislav B. Mišic

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OVS (Open vSwitch)是一种流行的基于OpenFlow的虚拟交换机,通常工作在Linux系统上。云计算和边缘数据中心的发展加速了它的普及,特别是随着5G移动网络的出现。使用OVS对网络系统进行性能分析有助于发现性能瓶颈,提高系统性能。分析建模是一种有效的性能评价方法。现有的OVS分析模型忽略了OVS工作系统的特性。因此,很难(如果不是不可能的话)检测到性能瓶颈。本文提出了一种基于OVS的Linux网络系统性能评估分析模型。与现有模型不同的是,我们的模型可以捕获数据包转发过程中每个消耗CPU的关键步骤。我们的模型还可以计算一系列性能指标,包括封隔器停留时间和阻塞概率。通过比较不同系统参数设置下的数值结果和仿真结果,验证了所提模型的近似精度。
Open vSwitch (OVS) is a popular virtual switch implementing OpenFlow, which often works in Linux system. The development of Cloud and Edge datacenters accelerates its popularity, especially with the emergence of 5G mobile networks. Performance analysis of a network system with OVS could help uncovering of performance bottlenecks and improving system performance. Analytic modeling is an effective performance evaluation approach. Existing analytical models of OVS ignored the characteristics of the system where OVS works. Thus, it is hard, if not impossible, to detect performance bottlenecks. This paper proposes a novel analytical model to evaluate the performance of Linux network system with OVS. Different from exiting models, our model can capture key steps, each of which consumes CPU in the packet forwarding process. Our model also enables the computation of a set of performance measures, including packer sojourn time and blocking probability. The approximate accuracy of the proposed model is validated by comparing numerical results with simulation results under various system parameter settings.
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