%T Support for occam channels via dynamic switching in multi\-transputer machines
%A Peter Jones, Alan Murta
%E Charlie Askew
%B OUG\-9: Occam and the Transputer \-\- Research and Applications
%X The authors are motivated by the disparity between the
arbitrarily large degree of inter\-process connectivity
allowed in the occam model of computation (by means of occam
channels) and the implementation of that model on the Inmos
transputer (under the familiar four links per processor
constraint). A communication technique has been developed
and implemented on the ParSiFal machine which addresses this
problem. The method involves a novel use of switching
hardware. In normal use, links between transputers in a
variable topology array such as the ParSiFal machine are
arranged using switching hardware to form a static network
before the application is loaded. This study explores the
run\-time reconfiguration of the switch network under the
direction of transputers executing user code, by means of a
request\-resource / relinquish\-resource protocol.
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