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World’s Fastest Supercomputers Hit Higher Speeds with Linux

 ZDNet
Steven J. Vaughan-Nichols
November 18, 2019

The latest Top500 supercomputer ratings found Linux-powered supercomputers currently average 1.14 petaflops in speed, with the Oak Ridge National Laboratory’s Summit system topping the list with a High-Performance Linpack benchmark of 148.6 petaflops. Ranked second is Lawrence Livermore National Laboratory’s Sierra system, with a speed of 94.6 petaflops, despite using the same Power9 central-processing units and Nvidia Tesla V100 graphic-processing units as Summit. Although China owns nearly half the world’s fastest supercomputers, U.S. systems have a 37.8% aggregate performance share to China’ 31.9%. The Green500 list of the most energy-efficient supercomputers ranked the A64FX prototype the top system, with 16.9 gigaflops/watt. Meanwhile, HDR InfiniBand-based machines account for 40% of the Top500’s aggregate performance, and Ethernet-based systems account for 29%.

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