https://www.top500.org/lists/2019/06/highs/
For the first time only Petaflop systems made the list. The total aggregate performance of all 500 system has now risen to 1.56 Exaflops.
Two IBM build systems called Summit and Sierra and installed at DOE’s Oak Ridge National Laboratory (ORNL) in Tennessee and Lawrence Livermore National Laboratory in California kept the first two positions in the TOP500 in the USA. The Summit system slightly improved it’s High Performance Linpack (HPL) since the last TOP500 listing half a year ago.
The number of installations in China continues to rise strongly. 44.0 % of all system are now listed as being installed in China. The number of system listed in the USA remains near it's all time low at 23.2 %. However, systems in the USA are on average larger, which allowed the USA (54.6%) to stay close to China (56.9%) in terms of installed performance.
Summit, an IBM-built system at the Oak Ridge National Laboratory (ORNL) in Tennessee, USA, remains at the #1 spot with an improved performance of 148.8 Pflop/s on the HPL benchmark, which is used to rank the TOP500 list. Summit has 4,356 nodes, each one housing two Power9 CPUs with 22 cores each and six NVIDIA Tesla V100 GPUs each with 80 streaming multiprocessors (SM). The nodes are linked together with a Mellanox dual-rail EDR InfiniBand network.
Sierra, a system at the Lawrence Livermore National Laboratory, CA, USA stayed at #2. It’s architecture is very similar to the new #1 systems Summit. It is build with 4,320 nodes with two Power9 CPUs and four NVIDIA Tesla V100 GPUs. Sierra achieved 94.6 Pflop/s.
Sunway TaihuLight, a system developed by China’s National Research Center of Parallel Computer Engineering & Technology (NRCPC) and installed at the National Supercomputing Center in Wuxi, which is in China's Jiangsu province was in the lead for the first 2 years of its life, and is now listed at the #3 position with 93 Pflop/s.
Tianhe-2A (Milky Way-2A), a system developed by China’s National University of Defense Technology (NUDT) and deployed at the National Supercomputer Center in Guangzho, China remained the No. 4 system with 61.4 Pflop/s.