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Supporting the Global Arrays PGAS Model Using MPI One-Sided Communication

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5 Author(s)

The industry-standard Message Passing Interface (MPI) provides one-sided communication functionality and is available on virtually every parallel computing system. However, it is believed that MPI's one-sided model is not rich enough to support higher-level global address space parallel programming models. We present the first successful application of MPI one-sided communication as a runtime system for a PGAS model, Global Arrays (GA). This work has an immediate impact on users of GA applications, such as NW Chem, who often must wait several months to a year or more before GA becomes available on a new architecture. We explore challenges present in the application of MPI-2 to PGAS models and motivate new features in the upcoming MPI-3 standard. The performance of our system is evaluated on several popular high-performance computing architectures through communication benchmarking and application benchmarking using the NW Chem computational chemistry suite.

Published in:

Parallel & Distributed Processing Symposium (IPDPS), 2012 IEEE 26th International

Date of Conference:

21-25 May 2012

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