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Instructor: Lawrence Landweber,Jun Murai No. 27 12/03/1999

Last detail

• Last  detail
  • source  can  still  accumulate  credit  within  an  AI
    
  • problem:  using  one  variable  (VClock)  to  control  both  queuing  order  and  flow  monitoring
    
  • solution:  introduce  auxiliary  copy  of  VClock
    
  • upon  receiving  each  packet...

  • AuxVClockⁱ = MAX(RealTime, AuxVClockⁱ)
  • VClockⁱ = VClockⁱ + VTickⁱ
  • AuxVClockⁱ = AuxVClockⁱ + VTickⁱ
  • Stamp packet with current value of AuxVClockⁱ

    
    

• Thus
  • VClockⁱ resynchronized with real time once for every AIRⁱ bytes of data on flow i AuxVClockⁱ resynchronized with real time once for every packet on flow i