Paper Details

@InProceedings{MillotVautherin89,
  title = "{D}ynamicity through {O}ccam and {TDS}",
  author= "Millot, D. and Vautherin, J.",
  editor= "Wexler, J.",
  pages = "14--22",
  booktitle= "{OUG}-11: {D}eveloping {T}ransputer {A}pplications",
  isbn= "90 5199 020 0",
  year= "1989",
  month= "sep",
  abstract= "A parallel program running on a parallel machine involves a
     logical network of processes and a physical network of
     processors. When both networks are known at design time, a
     static mapping of the logical network on the physical one
     can take place. Dynamicity arises when one of the networks
     is not entirely determined before execution starts. This can
     happen for instance when the logical network involves
     dynamic creation of processes, or when the physical topology
     cannot be defined at design time (this is the case in a
     multi-user context, as the configuration a user gets is
     affected by the other users' computations, or when the
     programmer wants to develop a generic program that can be
     executed on any physical topology).When using Occam to
     design a network of processes that has to be mapped on
     transputers, things have to be decided before execution
     starts :- the network of processes should be composed of an
     explicitly bounded number of processes due to the fact that,
     unlike CSP, Occam does not allow recursion,- the topology
     of the transputer network should be known, for processes are
     explicitly mapped onto processors. One has to investigate
     the physical topology in order to write the configuration
     statements, and a change in the topology entails
     modifications in these statements. An application is
     therefore dedicated to a configuration. It would
     nevertheless be very attractive to design software that
     could run on an unidentified topology, trying to make the
     best of available processors. Such software has to realize a
     dynamic placement and therefore includes a phase supposed to
     investigate the configuration, load the different codes on
     the appropriate processors, then dynamically start their
     execution.Our aim is to develop suitable tools to write that
     kind of application. As a first step, we investigate the
     potentiality of Occam and TDS in this field."
}

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