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Re:Chinese Chipmaker Unveils 64-Core ARM Processor by nl on Friday August 26, 2016 @11:53AM (#12367079)
That subsequently prompted some speculation that the chip would replace the now-banned Xeon Phi processors in the 100-petaflop upgrade to the Tianhe-2 supercomputer, which was supposed to be revealed in June at ISC 2016. Given that the latter never happened, it’s likely those FT-2000/64 chips were not deployed, or if they were, did not meet expectations.

Hmm..

Process:Manufacturing with 28nm process

And there you go.

Not sure if people are aware, but China doesn't have any sub-28nm (or 22nm?) fabs. TSMC has some of course, but the Taiwanese government is very, very strong on keeping those plants in Taiwan (although they are fine with TSMC etc building less advanced fabs in China).

Until they get a process shrink on this, I think.. well, I'd like to see some independent benchmarks.

Edit: The Samsung Exynos 5433 (4 cores on a 20nm process[1]) maxes out at 3.78 GFLOPS[2] on selected benchmarks. Call it 1 GLOP/core - I find it unlikely that this thing is going to get 500 GFLOPS with 64 cores, even with a higher power consumption.

[1] http://www.anandtech.com/show/8718/the-samsung-galaxy-note-4...

[2] http://www.anandtech.com/show/8718/the-samsung-galaxy-note-4...

Re:Chinese Chipmaker Unveils 64-Core ARM Processor by mrb on Friday August 26, 2016 @01:58PM (#12368019)
Here is how this Chinese processor claims 512 (single precision) GFLOPS: each core seems to have 128-bit NEON vector instructions, so it can execute 4 32-bit operations per cycle. The core runs at 2 GHz, so that's 8 GFLOPS per core. Times 64 cores = 512 GFLOPS. So yeah their claims check out.

These benchmark numbers you found about the Exynos 5433 are so low probably because "Geekbench 3" is not very good at reaching the maximum theoretical performance, as it runs a bunch of real-world computing tasks. In general you need to hand-code assembly loops of fused-multiply-add instructions to reach the max theoretical perf and clearly this is not what Geekbench does, look at the list of FP workloads it runs: http://support.primatelabs.com/kb/geekbench/geekbench-3-benc...

Re:Chinese Chipmaker Unveils 64-Core ARM Processor by CyberDildonics on Friday August 26, 2016 @05:04PM (#12369285)
Not only that but for most workloads you would need lots of memory bandwidth to supply the cores.
Re:Chinese Chipmaker Unveils 64-Core ARM Processor by rbanffy on Friday August 26, 2016 @01:21PM (#12367742)
Wide vector units could do miracles for their FP performance.
Re:Chinese Chipmaker Unveils 64-Core ARM Processor by tcoppi on Friday August 26, 2016 @01:01PM (#12367597)
> Not sure if people are aware, but China doesn't have any sub-28nm (or 22nm?) fabs.

That isn't true, SMIC has a 28nm process(very low yields, and only fabbing designs from Qualcomm afaik, but supposedly does exist, as far as anyone from the west can reasonably ascertain). [1]

1. http://www.smics.com/eng/press/press_releases_details.php?id...

Re:Chinese Chipmaker Unveils 64-Core ARM Processor by wodenokoto on Friday August 26, 2016 @01:09PM (#12367654)
>> Not sure if people are aware, but China doesn't have any sub-28nm (or 22nm?) fabs.

>That isn't true, SMIC has a 28nm process

I don't understand your comment. 28 is not sub-28.

Re:Chinese Chipmaker Unveils 64-Core ARM Processor by tcoppi on Friday August 26, 2016 @01:11PM (#12367669)
Whoops, my confusion came from the fact that the article was talking about it being made on a 28nm process, and I thought the criticism was China would be unable to fab it.