Probing the latencies of software timestamping

  title={Probing the latencies of software timestamping},
  author={Benjamin Villain and Matthew S. Davis and Julien. Ridoux and David Veitch and Nicolas Normand},
  journal={2012 IEEE International Symposium on Precision Clock Synchronization for Measurement, Control and Communication Proceedings},
Dealing effectively with latency is the key to accurate and reliable timekeeping over networks. Software components of timekeeping, including synchronisation algorithms such as ntpd, RADclock, and ptpd, must deal with the significant and highly variable latencies inherent to common operating systems. Using the DTrace system profiling tool, we provide an accurate breakdown of the latencies between common timestamping locations in the FreeBSD Operating System. We report on how these latency… CONTINUE READING