The University of Tokyo, the University of Tsukuba, and Fujitsu Limited today announced that the Oakforest-PACS massively parallel cluster-type supercomputer, built by Fujitsu and operated by the Joint Center for Advanced High Performance Computing (JCAHPC), has achieved a LINPACK performance result of 13.55 petaflops, as ranked in the November Top500 list for supercomputer performance. Given this, Oakforest-PACS has surpassed the K computer to officially become the highest performance supercomputer in Japan. The system’s peak performance is 25 petaflops, which is about 2.2 times that of the K computer. The Oakforest-PACS system is located in the Information Technology Center on the University of Tokyo’s Kashiwa Campus, but everything is carried out jointly by the University of Tokyo and the University of Tsukuba, including financing, implementation and operation of the system, as well as the majority of program usage. The system is made up of 8,208 computational nodes using Intel Xeon Phi high performance processors with Knights Landing architecture that uses many-core processor technology. The nodes are connected by Intel Omni-Path Architecture. Because of the progress in semiconductor and interconnect technology over the past five years, the system, which uses commercially available processors, has been able to achieve the highest level of performance in Japan. Learn more at https://www.hpcwire.com/off-the-wire/jcahpcs-oakforest-pacs-certified-top500-japans-highest-performance-supercomputer/