It is intended to model the
data access patterns of real-world
applications such as
sparse matrix calculations, thus testing the effect of limitations of the
memory subsystem and internal
interconnect of the supercomputer on its computing performance. Because it is internally
I/O bound (the data for the benchmark resides in main memory as it is too large for processor caches), HPCG testing generally achieves only a tiny fraction of the peak
FLOPS the computer could theoretically deliver. HPCG is intended to complement benchmarks such as the
LINPACK benchmarks that put relatively little stress on the internal interconnect. The source of the HPCG benchmark is available on
GitHub. As of November 2024, the
Fugaku supercomputer held the top spot in the HPCG performance rankings, followed by the
Frontier and
Aurora. In June 2020, Summit was superseded by
Fugaku with a speed of 16.0 HPCG-petaflops (an increase of 540%).
Summit is currently 4th,
LUMI 3rd and
Frontier 2nd. == See also ==