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The world's fastest supercomputer is back in America
By Thom Holwerda on 2018-06-12 23:10:44

Last week, the US Department of Energy and IBM unveiled Summit, America's latest supercomputer, which is expected to bring the title of the world's most powerful computer back to America from China, which currently holds the mantle with its Sunway TaihuLight supercomputer.

With a peak performance of 200 petaflops, or 200,000 trillion calculations per second, Summit more than doubles the top speeds of TaihuLight, which can reach 93 petaflops. Summit is also capable of over 3 billion billion mixed precision calculations per second, or 3.3 exaops, and more than 10 petabytes of memory, which has allowed researchers to run the world's first exascale scientific calculation.

The $200 million supercomputer is an IBM AC922 system utilizing 4,608 compute servers containing two 22-core IBM Power9 processors and six Nvidia Tesla V100 graphics processing unit accelerators each. Summit is also (relatively) energy-efficient, drawing just 13 megawatts of power, compared to the 15 megawatts TaihuLight pulls in.

There's something mesmerizing about supercomputers like these. I would love to just walk through this collection of machines.

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Read Comments: 1-10 -- 11-16
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One day
By quackalist on 2018-06-13 17:36:19
Back, as in it's rightful abode or somesuch? Hardly, doubt it'll be long before it resides elsewhere and increasingly so.
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RE[2]: Correction
By tylerdurden on 2018-06-13 17:37:10
"alphabet agencies" does not mean what you think it does.
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RE[3]: Correction
By Bill Shooter of Bul on 2018-06-13 18:30:48
All tremble at the power of the LOC, super computer. Its archives contain a LOC of storage that has harnessed the most awesome power known in this universe: Books!


Reading: Its FUNdamental.
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RE[2]: Red-Hat Linux
By kwan_e on 2018-06-14 00:42:22
> * RHEL 7 ppc64le on the Power9 CPUs
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* For compilers, the preferred is IBM XL, but GCC is also widely used. So is PGI, but less so.


IBM XL, eh? Are they still using some ported version of the old IBM XL for Linux on Power, or are they using the newer clang-based one?
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RE[3]: Red-Hat Linux
By CodeMonkey on 2018-06-14 01:18:11
At this point it's diverged from the BigEndian compiler used on AIX and BlueGene systems. The first set on Linux ppc64le was ported from the UNIX compiler but the most recent two releases for Linux ppc64le are now based on clang4. IBM has a pretty big investment in the new platform so the users are regularly using beta releases as well to squeeze every bit of optimization out of the physics codes they run.

Edited 2018-06-14 01:22 UTC
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Comment by kurkosdr
By kurkosdr on 2018-06-14 21:46:54
Personally I am more interested in what computers with more traditional memory architectures can do. Because those supercomputers are essentially glorified high-speed mesh networks. There are no smarts involved, just line up existing boxes as far as the wallet allows.

Edited 2018-06-14 21:47 UTC
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