Nov. 15
SESSION: Research Poster Reception
EVENT TYPE: ACM Student Research Competition Poster, Poster, Electronic Poster
TIME: 5:15 – 7:00PM
SESSION CHAIR: Bernd Mohr
AUTHORS: Jeff R. Hammond, Sreeram Potluri, Zheng (Cynthia) Gu, Alex Dickson, James Dinan, Ivo Kabadshow, Pavan Balaji, Vinod Tipparaju
ROOM: WSCC North Galleria 2nd/3rd Floors
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.
Chair/Author Details:
Bernd Mohr (Chair) – Juelich Supercomputing Centre
Jeff R. Hammond – Argonne National Laboratory
Sreeram Potluri – Ohio State University
Zheng (Cynthia) Gu – Florida State University
Alex Dickson – University of Chicago
James Dinan – Argonne National Laboratory
Ivo Kabadshow – Juelich Supercomputing Centre
Pavan Balaji – Argonne National Laboratory
Vinod Tipparaju – Oak Ridge National Laboratory