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Building a Low Latency Linux Software Router

机译:构建低延迟Linux软件路由器

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Packet processing (e.g. routing, switching, firewall) with commodity hardware is a cost-efficient and flexible alternative to specialized networking hardware. On commodity hardware the CPU typically becomes the bottleneck in packet processing. However, in well-known QoS mechanisms (e.g. DiffServ), the outgoing link is assumed to be the bottleneck. This limitation is unfavorable, in particular for latency-sensitive applications (e.g. VoIP, video conferencing, online gaming). Thus, we propose and implement a QoS concept for a Linux software router to prioritize latency-sensitive traffic at the incoming network interface. Our testbed measurements show that our prototype implementation improves the packet processing w.r.t the latency of latency-sensitive traffic even under high traffic loads.
机译:使用商用硬件的数据包处理(例如路由,交换,防火墙)是专用网络硬件的经济高效且灵活的替代方案。在商用硬件上,CPU通常成为数据包处理的瓶颈。但是,在众所周知的QoS机制(例如DiffServ)中,传出链路被认为是瓶颈。该限制是不利的,特别是对于延迟敏感的应用程序(例如VoIP,视频会议,在线游戏)。因此,我们为Linux软件路由器提出并实施了QoS概念,以对传入网络接口处的延迟敏感流量进行优先级排序。我们的测试平台测量结果表明,即使在高流量负载下,我们的原型实现也可以改善数据包处理,而不会增加对延迟敏感的流量的延迟。

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