Fugaku (supercomputer)

Fugaku
Active	From 2021
Sponsors	MEXT
Operators	Riken
Location	Riken Center for Computational Science (R-CCS)
Architecture	158,976 nodes; Fujitsu A64FX CPU (48+4 core) per node; Tofu interconnect D;
Operating system	Custom Linux-based kernel
Memory	HBM2 32 GiB/node
Storage	1.6 TB NVMe SSD/16 nodes (L1); 150 PB shared Lustre FS (L2); Cloud storage services (L3);
Speed	442 PFLOPS (per TOP500 Rmax), after upgrade; higher 2.0 EFLOPS on a different mixed-precision benchmark
Cost	US$1 billion (total programme cost)
Ranking	TOP500: No. 2, June 2022
Purpose	Scientific research
Legacy	TOP500 No.1, June 2020 – June 2022
Website	www.r-ccs.riken.jp/en/fugaku
Sources	Fugaku System Configuration

Fugaku (Japanese: 富岳) is a petascale supercomputer at the Riken Center for Computational Science in Kobe, Japan. It started development in 2014 as the successor to the K computer and made its debut in 2020. It is named after an alternative name for Mount Fuji.

It became the fastest supercomputer in the world in the June 2020 TOP500 list as well as becoming the first ARM architecture-based computer to achieve this. At this time it also achieved 1.42 exaFLOPS using the mixed fp16/fp64 precision HPL-AI benchmark. It started regular operations in 2021.

Fugaku was superseded as the fastest supercomputer in the world by Frontier in May 2022.

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