What’s the skinny? yesterday (June, 22 2020), Japan’s Fugaku supercomputer takes the crown, winning the top spot on the Top500 list with its 48-core Arm processors. Arm was also in the news yesterday as Apple announced it was dropping Intel in favor of Arm based processors going forward. Fugaku makes history as it is the only supercomputer to take the number one spot on Top500, HPCG, and Graph 500 simultaneously.
To achieve this with an Arm based system is pretty impressive since historically supercomputers have been built around Intel or AMD processors. There currently is only 4 Arm based supercomputers on the top 500 list.
|Architecture||Armv8.2-A SVE 512 bit|
With the following Fujitsu’s extensions: Hardware barrier, Sector cache, and Prefetch
|Number of computational cores||48 cores|
|Number of assistant cores||Computational node: 2 cores|
I/O and computational node: 4 cores
|Performance||Normal Mode: 2.0 GHz||DP: 3.072 TFLOPS, SP: 6.144 TFLOPS, HP: 12.288 TFLOPS|
|Boost Mode: 2.2 GHz||DP: 3.3792 TFLOPS, SP: 6.7584 TFLOPS, HP: 13.5168 TFLOPS|
|Cache (Notes:1) (Notes:2)||L1D/core: 64 KiB, 4way, 256 GB/s (load), 128 GB/s (store)|
|L2/CMG: 8 MiB, 16way|
L2/node: 4 TB/s (load), 2 TB/s (store)
L2/core: 128 GB/s (load), 64 GB/s (store)
|Memory||HBM2 32 GiB, 1024 GB/s|
|Interconnect||Tofu Interconnect D (28 Gbps x 2 lane x 10 port)|
|I/O||PCIe Gen3 x16|
Fugaku achieved a LINKPACK score of 415.53 petaflops using 152,064 of these nodes and when fully completed the Fugaku supercomputer will have 158,976 nodes. Using its current amount of nodes Japan’s supercomputer was roughly 2.8 times faster than its closest competitor Summit, which is the U.S department of energy’s supercomputer.
Installed at the RIKEN Center for Computational Science (R-CCS) in Kobe, Japan, Fugaku is billed as Japan’s next generation supercomputer that will carry out a wide variety of tasks. It will be put to use in tasks such as drug discovery, personalized and preventive medicine, simulations of natural disasters, weather and climate forecasting, energy creation, storage, and use, development of clean energy, new material development, new design and production processes; and—as a purely scientific endeavor—elucidation of the fundamental laws and evolution of the universe. It is currently being used on an experimental basis in the fight against COVID-19 and is scheduled to be fully operational in the first half of 2021.