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One needs distributed and shared memory constructs in the PEM
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One should look at extending HPF directives to refer to memory hierarchy
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It is interesting to look at adding directives to high level software systems such as those based on objects
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One needs (performance) predictability in lowest level PEM
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User control must be possible for any significant caches
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Note that as one goes to higher layers in the software model, useability increases and predictability decreases
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One needs layered software tools to match layered execution software
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Performance Monitoring
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Load Balancing -- this should be under user control -- I.e. in runtime and not O/S
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Debugging
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It is possible that support of existing software (teraApps) may not be emphasis
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