Paper Details

%T A general\-purpose parallel programming environment
%A Mark Debbage, Mark Hill, Denis A. Nicole
%E Janet Edwards
%B Proceedings of WoTUG\-14: Occam and the Transputer\-Current Developments
%X A parallel programming environment has been developed which
   is superior to many available systems on current generation
   transputers. The core of the package is a packet router
   which delivers asynchronous datagrams around arbitrary
   networks. The router is guaranteed not to deadlock provided
   that higher levels do not violate the eager\-readership
   edict. This eager0readership can be guaranteed by the use of
   communication protocols which ensure that packets are never
   sent to a destination which has insufficient buffer space
   available. The router has been implemented in C and is
   applicable to a wide number of loosely coupled
   multiprocessing architectures. The current implementation
   has been optimised for transputer networks, on which it
   achieves impressive communications performance. The
   implementation of a virtual channel protocol within occam
   semantics on such a router is discussed. This forms the
   basis of version 2.0 of the popular Virtual Channel Router
   (VCR) package. The user interface to these channels is the
   conventional occam syntax for communications but with the
   configuration restriction of four channel\-pairs per
   processor eliminated. The virtual channels provided by this
   package can be exploited from other languages through the
   appropriate Inmos Toolset.

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