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HATS: High Accuracy Timestamping System Based on NetFPGA

  • Zhiqiang Zhou
  • Lin Cong
  • Guohan Lu
  • Beixing Deng
  • Xing Li
Part of the Lecture Notes in Computer Science book series (LNCS, volume 6059)

Abstract

The delay and dispersion of the packet train have been widely used in most network measurement tools. The timestamp of the packet is critical for the measurement accuracy. However, timestamping performed either in the application or the kernel layer would be easily affected by the source and destination hosts especially in high-speed network. Therefore, to evaluate the impact of the timestamp precision on the measurement, a high accuracy timestamping hardware system (HATS) based on NetFPGA was designed and implemented. With HATS, the deviation of timestamp accuracy among the application, the kernel and the hardware layers was analyzed.

Keywords

Network measurement timestamp accuracy 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2010

Authors and Affiliations

  • Zhiqiang Zhou
    • 1
  • Lin Cong
    • 1
  • Guohan Lu
    • 2
  • Beixing Deng
    • 1
  • Xing Li
    • 1
  1. 1.Department of EETsinghua UniversityBeijingChina
  2. 2.Microsoft Research AsiaBeijingChina

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