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Measuring and reducing the impact of the operating system kernel on end-to-end latencies in synchronous packet switched networks

机译:在同步数据包交换网络中测量并减少操作系统内核对端到端延迟的影响

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摘要

This paper presents an evaluation of the impact of the so-called operating system (OS) latencies on the performance of a synchronous network based on global time coordination. The concept of end-to-end latency was first defined by extending the concept of latency used to evaluate the performance of real-time systems and the end-to-end latency provided by a general-purpose OS was measured as a benchmark. Finally, real-time techniques were used to reduce the worst-case values of such a latency, showing how a gateway between synchronous and asynchronous networks can be implemented by using commercial-off-the-shelf hardware and a proper software stack (based on a real-time version of Linux). The use of a real-time OS is still a nontrivial task, which requires experience and the analysis of the specific application to devise the proper techniques to be applied. This work dissects the problem of OS-to-network data transfer (and vice versa) identifying the key sources of latencies and delay jitter, and solving each problem with the application of a proper technique.
机译:本文介绍了基于全局时间协调的所谓操作系统(OS)延迟对同步网络性能的影响的评估。首先通过扩展用于评估实时系统性能的延迟概念来定义端到端延迟的概念,并以通用OS提供的端到端延迟为基准进行测量。最后,实时技术被用来减少这种延迟的最坏情况,显示了如何通过使用现成的商用硬件和适当的软件堆栈(基于实时版本的Linux)。实时操作系统的使用仍然是一项艰巨的任务,需要经验和对特定应用程序的分析,才能设计出适用的适当技术。这项工作剖析了OS到网络数据传输的问题(反之亦然),它确定了延迟和延迟抖动的关键来源,并通过应用适当的技术解决了每个问题。

著录项

  • 来源
    《Software》 |2012年第11期|p.1315-1330|共16页
  • 作者单位

    DISI University of Trento, Via di Sommarive 14, Trento 38123, Italy;

    DISI University of Trento, Via di Sommarive 14, Trento 38123, Italy, Luca Abeni, DISI, University of Trento, Via di Sommarive 14, Trento 38123, Italy;

    DAUIN, Politecnico di Torino, Torino 10129, Italy;

    DISI University of Trento, Via di Sommarive 14, Trento 38123, Italy;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    kernel latency; end-to-end delay; pipeline forwarding; real-time linux;

    机译:内核延迟;端到端延迟;管道转发;实时Linux;
  • 入库时间 2022-08-17 13:03:50

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