Potential performance bottleneck in Linux TCP

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TCP is the most widely used transport protocol on the Internet today. Over the years, especially recently, due to requirements of high bandwidth transmission, various approaches have been proposed to improve TCP performance. The Linux 2.6 kernel is now preemptible. It can be interrupted mid-task, making the system more responsive and interactive. However, we have noticed that Linux kernel preemption can interact badly with the performance of the networking subsystem. In this paper we investigate the performance bottleneck in Linux TCP. We systematically describe the trip of a TCP packet from its ingress into a Linux network end system to ... continued below

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22 pages

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Wu, Wenji & Crawford, Matt December 1, 2006.

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TCP is the most widely used transport protocol on the Internet today. Over the years, especially recently, due to requirements of high bandwidth transmission, various approaches have been proposed to improve TCP performance. The Linux 2.6 kernel is now preemptible. It can be interrupted mid-task, making the system more responsive and interactive. However, we have noticed that Linux kernel preemption can interact badly with the performance of the networking subsystem. In this paper we investigate the performance bottleneck in Linux TCP. We systematically describe the trip of a TCP packet from its ingress into a Linux network end system to its final delivery to the application; we study the performance bottleneck in Linux TCP through mathematical modeling and practical experiments; finally we propose and test one possible solution to resolve this performance bottleneck in Linux TCP.

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22 pages

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  • Report No.: FERMILAB-PUB-06-432-CD
  • Grant Number: AC02-07CH11359
  • Office of Scientific & Technical Information Report Number: 897196
  • Archival Resource Key: ark:/67531/metadc888303

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Office of Scientific & Technical Information Technical Reports

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  • December 1, 2006

Added to The UNT Digital Library

  • Sept. 22, 2016, 2:13 a.m.

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  • Sept. 26, 2017, 6:37 p.m.

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Wu, Wenji & Crawford, Matt. Potential performance bottleneck in Linux TCP, article, December 1, 2006; Batavia, Illinois. (digital.library.unt.edu/ark:/67531/metadc888303/: accessed October 16, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.