11/16/2012

The rapid evolution of supercomputing displayed at SC12

Donald B Johnston, LLNL, (925) 423-4902, johnston19@llnl.gov



The Cardioid code, developed by a team of Livermore and IBM
scientists, divides the heart into a large number of manageable
pieces, or subdomains.

If the annual supercomputing (SC) conference proves anything, it is that high performance computing technology changes with stunning speed. But then, the purpose of SC is to galvanize the forces that bring about that change.

SC12, held in Salt Lake City, was no exception. Sequoia, the 16.3 petaflops (quadrillion floating point operations per second) IBM BlueGene/Q system at LLNL, dropped to No. 2 on the industry standard Top500 list of the world's fastest supercomputers. The new title holder is Titan, a 17.89 petaflop Cray system, at Oak Ridge National Laboratory in Tennessee.

These changes reflect the themes raised by SC12 keynote speaker, Michio Kaku, a physicist, futurist and author who told conference attendees that "today's supercomputers are tomorrow's infrastructure."

"The rapid evolution of high performance computing should come as no surprise," said Dona Crawford, associate director for Computation. "The leadership role LLNL plays in supercomputing contributes significantly to the new developments in HPC highlighted at SC."


Dona Crawford shows off Sequoia's No. 1 rank.

Sequoia nonetheless retained its No. 1 Graph 500 ranking, showcasing its ability to conduct analytic calculations or finding the needle in the haystack by traversing 15,363 giga edges per second on a scale of 40 graph (a graph with 2^40 vertices). The system's capability also played a role in one of the conferences most watched competitions, the Gordon Bell Prize. Two of the final five submissions used Sequoia: a simulation of the human heart's electrophysiology using a code called Cardioid, developed by a LLNL/IBM team; and a cosmology simulation led by  Argonne National Laboratory. In spite of these impressive calculations, the Gordon Bell prize was won by a team from Japan for an astrophysical N-body simulation run on the K supercomputer.

Sequoia also was selected by readers of HPC Wire, the high performance computing news services, for a 2012 Readers Choice Award. Michel McCoy, head of LLNL's Advanced Simulation and Computing Program, received the award from Tom Tabor, publisher of HPC Wire.

Founded in 1952, Lawrence Livermore National Laboratory provides solutions to our nation's most important national security challenges through innovative science, engineering and technology. Lawrence Livermore National Laboratory is managed by Lawrence Livermore National Security, LLC for the U.S. Department of Energy's National Nuclear Security Administration.