Long-range dependence and on-chip processor traffic

  • Authors:
  • Antoine Scherrer;Antoine Fraboulet;Tanguy Risset

  • Affiliations:
  • Universtité de Lyon, Laboratoire de Physique, ENS Lyon F69364, France;Universtité de Lyon, INRIA, INSA-Lyon, CITI, Bat 502, 20 Avenue Albert Einstein, F69621 Villeurbanne, France;Universtité de Lyon, INRIA, INSA-Lyon, CITI, Bat 502, 20 Avenue Albert Einstein, F69621 Villeurbanne, France

  • Venue:
  • Microprocessors & Microsystems
  • Year:
  • 2009

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Abstract

Long-range dependence is a property of stochastic processes that has an important impact on network performance, especially on the buffer usage in routers. We analyze the presence of long-range dependence in on-chip processor traffic and we study the impact of long-range dependence on networks-on-chip. long-range dependence in communication traces of processorips at the cycle-accurate level. We also study the impact of long-range dependence on a real network-on-chip using the SocLib simulation environment and traffic generators of our own. Our experiments show that long-range dependence is not an ubiquitous property of on-chip processor traffic and that its impact on the network-on-chip is highly correlated with the low level communication protocol used.