SCHEDULE: NOV 12-18, 2011

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High-Level, One-Sided Programming Models on MPI: A Case Study with Global Arrays and NWChem

SESSION: Research Poster Reception

EVENT TYPE: ACM Student Research Competition Poster, Poster, Electronic Poster

TIME: 5:15PM - 7:00PM

SESSION CHAIR: Bernd Mohr

AUTHOR(S):James Dinan, Pavan Balaji, Jeff R. Hammond, Sriram Krishnamoorthy, Vinod Tipparaju

ROOM:WSCC North Galleria 2nd/3rd Floors

ABSTRACT:
Global Arrays (GA) is popular high-level parallel programming model that provides data and computation management facilities to the NWChem computational chemistry suite. GA's global-view data model is supported by the ARMCI partitioned global address space runtime system, which traditionally is implemented natively on each supported platform in order to provide the best performance. The industry standard Message Passing Interface (MPI) also provides one-sided functionality and is available on virtually every supercomputing system. We present the first high-performance, portable implementation of ARMCI using MPI one-sided communication. We interface the existing GA infrastructure with ARMCI-MPI and demonstrate that this approach reduces the amount of resources consumed by the runtime system, provides comparable performance, and enhances portability for applications like NWChem.

Chair/Author Details:

Bernd Mohr (Chair) - Juelich Supercomputing Centre

James Dinan - Argonne National Laboratory

Pavan Balaji - Argonne National Laboratory

Jeff R. Hammond - Argonne National Laboratory

Sriram Krishnamoorthy - Pacific Northwest National Laboratory

Vinod Tipparaju - Oak Ridge National Laboratory

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