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DTSTART:19700308T020000
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DTSTAMP:20260522T150115Z
LOCATION:D168
DTSTART;TZID=America/Chicago:20181116T091000
DTEND;TZID=America/Chicago:20181116T092000
UID:submissions.supercomputing.org_SC18_sess144_ws_pawatm111@linklings.com
SUMMARY:Development and Performance Comparison of MPI and Fortran Coarrays
  within an Atmospheric Research Model
DESCRIPTION:Soren C. Rasmussen (Cranfield University), Ethan D Gutmann (Na
 tional Center for Atmospheric Research), Brian Friesen (Lawrence Berkeley 
 National Laboratory), Damian Rouson (Sourcery Institute), and Salvatore Fi
 lippone and Irene Moulitsas (Cranfield University)\n\nA mini-application o
 f the Intermediate Complexity Research (ICAR) Model offers an opportunity 
 to compare the costs and performance of the Message Passing Interface (MPI
 ) versus coarray Fortran, two methods of communication across processes. T
 he application requires repeated communication of halo regions, which is p
 erformed with either MPI or coarrays. The MPI communication is done using 
 non-blocking two-sided communication, while the coarray library is impleme
 nted using a one-sided MPI or OpenSHMEM communication backend.  We examine
  the development cost in addition to strong and weak scalability analysis 
 to understand the performance costs.\n\nTag: Parallel Programming Language
 s, Libraries, and Models, Productivity\n\nRegistration Category: Workshop 
 Reg Pass\n\n
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