Eecient Run-time Support for Irregular Block-structured Applications Running Head: Eecient Run-time Support for Irregular Block-structured Applications List of Symbols

Parallel implementations of scientiic applications often rely on elaborate dynamic data structures with complicated communication patterns. We describe a set of intuitive geometric programming abstractions that simplify coordination of irregular block-structured scientiic calculations without sacriicing performance. We have implemented these abstractions in KeLP, a C++ run-time library. KeLP's abstractions enable the programmer to express complicated communication patterns for dynamic applications, and to tune communication activity with a high-level, abstract interface. We show that KeLP's exible communication model eeectively manages elaborate data motion patterns arising in structured adaptive mesh reenement, and achieves performance comparable to hand-coded message-passing on several structured numerical kernels. The following symbols and fonts were generated with LaTex: The typewriter font is used in Figures with code fragments.

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