“China Has Already Reached Exascale—On Two Separate Systems”, 2021-10-26 (; similar):
[see also “Why Did China Keep Its Exascale Supercomputers Quiet?”] …The supercomputing community has long been used to public results on the Top 500 list of the world’s most powerful systems with countries actively vying for supremacy. However, with tensions at peak and the entity list haunting the spirit of international competition, we can expect China to remain mum about some dramatic system leaps. Including the fact that the country has already broken the (true/LINPACK) exascale barrier in 2021—on more than one machine.
We have it on outstanding authority (under condition of anonymity) that LINPACK was run in March 2021 on the Sunway “Oceanlite” system, which is the follow-on to the #4-ranked Sunway TaihuLight machine. The results yielded 1.3 exaflops peak performance with 1.05 sustained performance in the ideal 35 megawatt power sweet spot.
…The same authority confirmed that a second exascale run in China, this time on the Tianhe-3 system, which we previewed back in May 2019, reached almost identical performance with 1.3 exaflops peak and enough sustained to be functional exascale. We do not have a power figure for this but we were able to confirm this machine is based on the FeiTeng line of processors from Phytium, which is Arm-based with a matrix accelerator. (For clarity, FeiTeng is kind of like “Xeon”, it’s a brand of CPUs from Phytium).
…From what we can tell on these 2 exascale systems there are modest changes to architectures, doubling of chip elements and sockets. That is not to minimize the effort, but we do not suspect new architectures emerging that can fit another coming bit of news, a so-called Futures program that aims to deliver a 20 exaflops supercomputer by 2025, according to our same source, who is based in the United States but in the know about happenings in China.
But here’s something to keep in mind as we go forward in this frigid international climate: perhaps we can no longer expect to have a clear, Top 500 supercomputer list view into national competitiveness in quite the same way. If China, always a contender with the United States, is running LINPACK but not making the results public, what happens to the validity and international importance of that list, which has been a symbol of HPC progress for decades? What does China have to lose, would it not be in the national interest to show off not one, but 2 validated exascale for both peak and sustained results?
Here is something subtle to consider: the forthcoming “Frontier” supercomputer at Oak Ridge National Lab in the US is expected to debut with 1.5 peak exaflops and an expected sustained figure around 1.3 exaflops. Perhaps China has decided to quietly leak that they are first to true exascale without having to publish benchmark results that might show a slightly better performance figure for a US-based machine. Just something to think about.
And here’s another subtle detail. Our source confirms these LINPACK results for both of China’s exascale systems—the first in the world—were achieved in March 2021. When did the entity list appear citing Phytium and Sunway and the centers that host their showboat systems? In April 2021.