TOKYO China has jumped to the front ranks of the supercomputing powers with the new Sunway TaihuLight, powered by domestically developed chips. It was recently crowned the fastest computer in the world.
In its debut on the Top500 list of the world’s fastest supercomputers in June, the Sunway TaihuLight overwhelmed such rivals as the Tianhe-2, a Chinese supercomputer powered by Intel chips that has claimed the No. 1 spot on the past six Top500 lists. Furthermore, it was the first time for China to surpass the U.S. in the total number of systems on the list.
The Top500 list is published twice a year, in June and November. In 2011, Japan’s K computer, developed by the Riken Advanced Institute for Computational Science, was ranked first in two consecutive editions of the list.
The following year, however, the K was dethroned, outperformed by the U.S.-made Titan and Sequoia machines.
In 2013, China’s Tianhe-2 took the title and maintained the No. 1 position for six straight releases of the Top500 list.
U.S. EXPORT BAN The Tianhe-2’s use of Intel processors became an international issue in February last year, when the U.S. government, claiming that China was using the computer to develop nuclear weapons, banned U.S. companies from exporting microprocessors and other supercomputer parts to the country.
But China’s National Research Center of Parallel Computer Engineering & Technology was already developing a newer computing monster using processors designed and made in China.
The Sunway TaihuLight claimed the top slot on the latest edition of the Top500 list, which ranks supercomputers in terms of calculation speed. No other supercomputer came close to China’s new system, whose theoretical peak performance is 93 petaflops — meaning it can perform 93 quadrillion calculations per second.
It also took the third spot on the Green500 list, which ranks the 500 fastest supercomputers by energy efficiency, or calculation speed per watt. The two Riken systems were ranked No. 1 and No. 2 on this list in June, but they are specialized systems designed for energy-efficient calculations. In other words, the Sunway TaihuLight is the greenest supercomputer among purely high-speed systems.
China was able to create a machine that is both powerful and energy efficient by using an enormous number of processors through advanced parallel computing technology while restricting the performance of energy-hogging memory devices. Since the Top500 rankings are based on the speed of simple calculations, memory performance is not a critical factor.