This program is going to be challenging
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Indexing of arrays will be difficult
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Owner-computes rule difficult to apply
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Key technique: inspector-executor communication
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First time the code is executed, generate a table of required communication at run time (inspector)
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Problem: How big does that table get?
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Problem: How do you efficiently distribute that table to all processors?
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Use this table to manage unstructured communication until the communication pattern changes (executor)
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Problem: How do you know the pattern has changed?
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Commercial compilers are attacking these problems, but there is a long way to go
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