Effect of coarse timer granularities on QoS guarantees in Unix based systems

Jin Ho Kim, Saewoong Bahk, Hyogon Kim

Research output: Contribution to conferencePaper

Abstract

While it is usually assumed that packet schedulers in routers have sufficiently fine-grain timers, network systems frequently have timers of coarse granularity. Therefore application users cannot obtain the desired QoS even if they reserve the required bandwidth for transmission. In this paper, we investigate QoS failures that occur due to coarse timer granularities. Based on the investigation, we experiment with two methods to cure the problems. We implement them into real PC Unix-based systems and show that they can satisfy QoS requirements of TCP connections by transmitting the traffic as much as for the reserved bandwidth.

Original languageEnglish
Pages969-973
Number of pages5
Publication statusPublished - 2000
Event2000 IEEE International Conference on Communications - New Orleans, LA, USA
Duration: 2000 Jun 182000 Jun 22

Other

Other2000 IEEE International Conference on Communications
CityNew Orleans, LA, USA
Period00/6/1800/6/22

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Electrical and Electronic Engineering

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  • Cite this

    Kim, J. H., Bahk, S., & Kim, H. (2000). Effect of coarse timer granularities on QoS guarantees in Unix based systems. 969-973. Paper presented at 2000 IEEE International Conference on Communications, New Orleans, LA, USA, .