Just recently, news surfaced that Nvidia is interested in acquiring Arm from SoftBank, which stirred up quite some fuss. While many individuals agree that it would be a good move for Nvidia own sake, it's also clear that many think it would be bad for the industry, and one of those people is one of Arm's early pioneers, Hermann Hauser, who helped design the first chip at Acorn Computers.
As interviewed by the BBC, Hauser is on record expressing that he is against Nvidia as an owner of the company, though he also believes the deal won't end up going through.
"It's one of the fundamental assumptions of the ARM business model that it can sell to everybody," Hauser told BCC, "The one saving grace about Softbank was that it wasn't a chip company, and retained ARM neutrality. If it becomes part of Nvidia, most of the licensees are competitors of Nvidia, and will of course then look for an alternative to ARM."
Among Arm's clients are Intel, Nvidia, Apple, Qualcomm, TSMC, Samsung, and more.
However, Dr. Hauser does believe that Softbank interest in selling Arm presents an opportunity: if not to Nvidia, he believes that the British government should get involved to bring the Cambridge-founded company back to home soil. "The great opportunity that the cash needs of Softbank presents is to bring ARM back home and take it public, with the support of the British government."
Thus far, it is unclear whether Nvidia acquiring Arm will actually happen. Although there is no doubt about Nvidia being serious about the acquisition, the deal would likely be subject to strict supervision from antitrust regulators, which could hamper Nvidia plans.
That's where I think Nvidia is going with this and they want Arm as a design resource more than anything else.
I don't think any of those open source ISA's are close to the same maturity level of ARM. Apple could do something like this but they are even more heavily invested in ARM since building there own ARM laptop chip. If Nvidia does buy ARM I highly suspect open source ISA's will look better and you will see a large group of companies come together to produce one standard ISA. I could see Amazon, Apple, and Google join together to make one ISA.
You are comparing the Aurora supercomputer project, which maybe Intel will complete in the future, in 2 years from now, and only by using Intel GPUs manufactured at TSMC, as disclosed by Intel recently, with the Fujitsu ARM computer, which exists and works right now.
Therefore the comparison is meaningless. The Fujitsu ARM CPUs have about the same power efficiency as the NVIDIA Volta GPUs, which is unprecedented for a CPU. Of course, the new NVIDIA Ampere will surpass them and take again the first place in power efficiency, but this time with a much less advance than over past CPUs.
The current Intel Cascade Lake and Cooper Lake CPUs, when using AVX-512, have a power efficiency 3 times less than either the NVIDIA Volta GPUs or the Fujitsu ARM CPUs.
Of course, the high power efficiency of the Fujitsu ARM CPUs has much less to do with them implementing the ARM instruction set than to the fact that they implement the new SVE instruction set extension for vector computation.
I wouldn't put too much faith in large corporations necessarily faring a whole lot better since those would be under considerable internal pressure to get some sort of product out the door instead of minimizing design and performance roadblocks from ISA to silicon and software.
Did you check out the revision history of RISC V? They're already up to v2.1:
Here are some benchmarks of a board running Linux on RISC V from > 2 years ago:
Of course, the performance is nothing to write home about, but the fact that they could already boot the OS and run a benchmark suite, back then, is saying something about maturity.
That's why it's good to have open source OS kernels and toolchains - because they have gatekeepers who block low-quality patches, forcing contributors to set aside the schedule and resources to do it right.