China Makes World's Fastest Supercomputer

shmG writes "China has replaced the United States as the maker of the world's fastest supercomputer. A Chinese research center has made the world's faster super computer — named as Tianhe-1A, which was released at a national conference on high-performance computers (HPC) in China. Made at a cost of over $88 million, Tianhe-1A is theoretically able to do more than 1 quadrillion calculations per second (one petaflop) at peak speed. Tianhe-1A 's peak performance reaches 1.206 petaflops, and it runs at 563.1 teraflops (1,000 teraflops is equal to one petaflop) on the Linpack benchmark."

Comments

Fire this reporter

[Orgasmatron]

The article starts by claiming 2.507 petaflops, but gives no mention if that is Rmax or Rpeak. We have to assume that it is Rmax, since 2.5 petaflops is no big deal in terms of Rpeak.

Unfortunately, then the article lists both Rpeak and Rmax. But the numbers quoted seem to be for Tianhe-I (#7 on the top 500 list), not Tianhe-IA (not currently listed). Wikipedia table of the top 10

Oh, and it gets better. The article claims that Tianhe-IA has 7,168 GPUs and 14,336 CPUs. Very strange, since the Tianhe-I has 71,680 CPU/GPU pairs.

My guess is that China doubled up their Tianhe-I computer and swapped out for newer GPUs, then named the new thing Tianhe-IA (this is pretty normal when competing for top500 spots). I'm going to go with 143,360 Xeon/M2050 pairs. Either that, or the Chinese found a way to overclock 10% of their chips into the 20+ GHz range and threw out the rest.

Re:Uh - China didn't "make" it, they "assembled" i

[je ne sais quoi]

The real trick has always been the interconnects & the software that gets those thousands of C/GPUs talking to each other.

Yes, this is spot on for massively parallel systems. The interesting thing is that China does actually make their own interconnects, but they aren't so great. The Tianhe-1 actually runs at 47% of the theoretical capacity. In contrast, the previous number 1 (Jaguar) runs at about 76%. In fact, China's previous big HPC was Nebulae, which had a higher theoretical peak than Jaguar, but didn't actually perform faster because of interconnects problem.