Paper Details

%T WEAVE: A System for Dynamic Configuration of Virtual Links
%A S. R. Harrison, Chris R. Brown
%E André W. P. Bakkers
%B Proceedings of WoTUG\-20: Parallel Programming and Java
%X This paper describes Weave, a system which has been
   developed to support the use of a DS Link (IEEE 1355) based
   parallel computer architecture. Weave is an extension layer
   on IIPC (a simple transputer and UNIX parallel processing
   environment which provides dynamic process management,
   hardware transparency and message passing.) Although Weave
   is suitable for any T9000 Transputer network, it has been
   specifically designed to support the use of the AIVRU DS
   Link Vision Engine. A brief description is given of this
   machine, which processes live digital video using a mixture
   of hardware modules and software processes, all
   interconnected by DS Links. Weave provides the ability to
   make virtual link connections between processes on demand at
   run\-time. These connections may be disconnected when no
   longer required, and hence the whole hardware architecture
   is dynamically reconfigured automatically to suit the
   requirements of the software application. A small functional
   interface provides processes with the ability to alter their
   own connectivity, and that of other processes. A temporal
   locking mechanism for each virtual link controls when it may
   be disconnected, and when pending connection requests can be
   fulfilled. This locking mechanism is driven by the action of
   communication over the virtual link. The Weave system
   supports transparently, the creation and destruction of
   connections between software processes and the image
   processing hardware modules (and between hardware modules
   directly). Also provided transparently by Weave is support
   for the use of hardware message replicator module(s) that
   multicast virtual link data to any number of DS Link
   recipients.

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