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Paper Details

  title = "{CSPP} and {E}vent {P}riority",
  author= "Lawrence, Adrian E.",
  editor= "Chalmers, Alan G. and Mirmehdi, Majid and Muller, Henk",
  pages = "67--92",
  booktitle= "{C}ommunicating {P}rocess {A}rchitectures 2001",
  isbn= "1 58603 202 X",
  year= "2001",
  month= "sep",
  abstract= "CSPP is an extension of CSP which includes priority as used
     in standard occam. The occam community has often discussed
     whether those notions are really adequate, a particular
     concern being the difficulties associated with priority
     inversion. One idea is to give priority to sets of events
     considered independently of the processes that perform them.
     We call this 'event priority'. Event priority is static in
     this presentation. But it is possible to handle dynamic
     priority using a global synchronisation when the 'event
     priority' changes. Obviously there is no problem for a
     software system with a central scheduler, but the theory
     here is addressing a far wider class of systems, in
     particular massively parallel, widely distributed,
     implemented in either hardware or software or both. It may
     be that some higher level of abstraction should replace
     priority: priority is a mechanism for achieving certain
     properties, often relating to time and limited resources.
     Here we content ourselves with finding a formal description
     of a language including event-priority."

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