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After a mesh is partitioned into subdomains, there remain several operations that have to be performed on the partitions to prepare the input for the parallel program. We refer to these steps collectively as parceling. The steps include generating (i) the communication schedule for each processor; (ii) the global-to-local mapping information, which allows identification of a node or element number on a processor by its global number; and (iii) the nonzero structure of the stiffness matrix on each processor. The last item could be performed in parallel, but it takes little time and provides us with useful statistics on the mesh, so we perform it sequentially.

Hesheng Bao
Wed Apr 2 16:22:44 EST 1997