Random Data Accesses on a Coarse-Grained Parallel Machine II. One-to-Many and Many-to-One Mappings

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Abstract:

This paper describes deterministic communication-efficient algorithms for performing random data accesses with hot spots on a coarse-grained parallel machine. The general random access read-write operations with hot spots can be completed in Cmun/p (+ lower order terms) time and is optimal and scalable provided n ยป p3 + p2tau/mu (n is the number of elements distributed across p processors, tau is the start-up overhead and 1/mu is the data transfer rate). C is a small constant between 3 and 4 for the random access write operation, slightly higher for the random access read operation. Monotonic random access reads/writes can be completed with smaller constants and are optimal for smaller n as well. A companion paper [26] deals with the problem of performing dynamic permutations.

Document Type: Research Article

Affiliations: 1: Syracuse University, Syracuse, New York, 13244-4100 2: University of Florida, Gainesville, Florida, 32611-6120

Publication date: July 1, 1997

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