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Q. Example on Distribution of Data?
!HPF$ PROCESSORS P1(4)
!HPF$ TEMPLATE T1(18)
!HPF$ DISTRIBUTE T1(BLOCK) ONTO P1
Consequently of these instructions distribution of data would be as displayed in Figure below.
Figure: Block Distribution of Data
In a alternative of block distribution the number of template elements assigned to every processor may be explicitly specified as in
!HPF$ DISTRIBUTE T1 (BLOCK (6)) ONTO P1
Distribution of data will be as displayed in Figure below.
Figure: Variation of Block Distribution
It means we assign all template elements before exhausting processors and some processors are left empty.
(b) Cyclic Distribution
Simple cyclic distribution is specified by
!HPF$ DISTRIBUTE T1(CYCLIC) ONTO P1
The first processor gets first template element and second gets second and so on. When a set of processors is exhausted go back to first processor and carry on allocating template elements from there.
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