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• W43376698 abstract "We introduce a model of parallel computation that retains the ideal properties of the PRAM by using it as a sub-model, while simultaneously being more reflective of realistic parallel architectures by accounting for and providing abstract over and synchronization costs. The Hierarchical PRAM (H-PRAM) model controls conceptual complexity in the face of in two ways. First, by providing the simplifying assumption of synchronization to the design of algorithms, but allowing the algorithms to work asynchronously with each other; and organizing this control asynchrony via an implicit hierarchy relation. Second, by allowing .the restriction of communication asynchrony in order to obtain determinate algorithms (thus greatly simplifying proofs of correctness). It is shown that the model is reflective of a variety of existing and proposed parallel architectures, particularly ones that can support massive parallelism. Relationships to programming languages are discussed. Since the PRAM is a sub-model, we can use PRAM algorithms as sub-algorithms in algorithms for the H-PRAM; thus results that have been established with respect to the PRAM are potentially transferable to this new modeL The H-PRAM can be used as a flexible tool to investigate general degrees of locality (neighborhoods of activity) in problems, considering and synchronization simultaneously. This gives the potential of obtaining algorithms that map more efficiently to architectures, and of increasing the number of processors that can efficiently be used on a problem (in comparison to a PRAM that charges for and synchronization). The model presents a framework in which to study the extent that general locality can be exploited in parallel" @default.
• W43376698 created "2016-06-24" @default.
• W43376698 creator A5014608084 @default.
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• W43376698 date "1991-01-01" @default.
• W43376698 modified "2023-09-27" @default.
• W43376698 title "A Practical Hierarchial Model of Parallel Computation: The Model" @default.
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• W43376698 hasPublicationYear "1991" @default.
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