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Synchronization of MPI One-Sided Communication on a Non-Cache-Coherent Many-Core System

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2016

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Gesellschaft für Informatik e.V., Fachgruppe PARS

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This paper discusses the design and implementation of MPI’s general active target synchronization on the Intel Single-Chip Cloud Computer, a non-cache-coherent many-core CPU. Measurements show a performance benefit of a factor of four compared to the default SCC-tuned MPI implementation and demonstrate the feasibility of implementing efficiently a shared memory protocol despite the lack of cache coherence. Further, a classification of implementation designs of MPI’s general active target synchronization is presented.

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Christgau, Steffen; Schnor, Bettina (2016): Synchronization of MPI One-Sided Communication on a Non-Cache-Coherent Many-Core System. PARS-Mitteilungen: Vol. 33, Nr. 1. Berlin: Gesellschaft für Informatik e.V., Fachgruppe PARS. PISSN: 0177-0454. pp. 5-10

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