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Each partition is a rectangular region of the global domain, described
by the global offset of its upper left corner, and its local extents
in the X and Y dimensions. The global extent in the X dimension must
also be given. In this case, we have ig_paral(1:5):
- ig_paral(1) = 2 (indicates a Box partition)
- ig_paral(2) = the upper left corner global offset
- ig_paral(3) = the local extent in x
- ig_paral(4) = the local extent in y
- ig_paral(5) = the global extent in x.
Figure 2.4 illustrates a Box partition over 3
processes.
Figure 2.4:
Box partition. It is assumed here that the global index starts at 0
in the upper left corner.
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Laure Coquart
2017-11-23