K Computer Takes First Place for the Second Consecutive Time on HPCG Benchmark
2017年6月21日 - 10:09AM
JCN Newswire (英)
On June 19, the K computer took first place for the second
consecutive time in the HPCG benchmark, a new index developed to
create a more realistic view of supercomputer performance compared
to the commonly used LINPACK benchmark. This success, which
surpasses the second place achieved in 2014 and 2015, was made
possible by subsequent improvements of the performance of the
system and applications.
The HPCG (High Performance Conjugate Gradient) benchmark measures
how fast a computer can solve symmetric sparse linear system
equations using the conjugate gradient method preconditioned with a
multi-grid symmetric Gauss-Seidel smoother. Problems of this type
are typically encountered in actual engineering and industrial
applications, and require a balance between calculation
performance, memory performance and communication performance,
unlike LINPACK, which looks at calculation speed alone.
For this result, all of the K computer's 82,944 compute nodes were
used, achieving a performance of 602 teraflops. This figure is
higher than the supercomputers that placed higher than the K
computer in the TOP500 rankings, demonstrating outstanding
performance in various science and engineering fields.
According to Mike Heroux of Sandia National Laboratories, who
developed the HPCG benchmark, "The HPCG benchmark is very
demanding. A good score requires strong and versatile memory system
performance, excellent interconnect network performance at scale,
and an overall balanced system. The top ranking of the K computer
is no surprise."
The award will be presented at ISC High Performance 2017 in
Frankfurt, Germany.
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