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PRODID:-//Microsoft Corporation//Outlook MIMEDIR//EN
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DTSTART:20111116T011500Z
DTEND:20111116T030000Z
LOCATION:WSCC North Galleria 2nd/3rd Floors
DESCRIPTION;ENCODING=QUOTED-PRINTABLE:ABSTRACT: We have developed a new library for one-sided communication and applied it to three different scientific codes: the NWChem computational chemistry application, the ScaFaCoS (Scalable Fast Coulomb Solvers) library, and the NEUS (non-equilibrium umbrella sampling) application.  All three codes rely upon asynchronous communication, such as one-sided put, get, accumulate and remote atomics (e.g. fetch-and-add).  Our library was designed to meet the requirements of current and next-generation interconnects found in Blue Gene/P and Q, PERCS and Cray XE architectures, such as dynamic routing, DMA engines and hardware remote atomics.  The synchronization semantics and implementation have been designed for scalability to more than one million ranks.  We demonstrate the scaling of all three applications to thousands of cores.  As a scaling exemplar, the fast multiple method (FMM) in ScaFaCoS is demonstrated to scale to 300K ranks of Jugene, which is impossible with MPI and ARMCI for both semantic and implementation reasons.
SUMMARY:Fast One-Sided Communication on Supercomputers and Application to Three Scientific Codes
PRIORITY:3
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