Arm processors: Everything you need to know

guest · Jul 20, 2020

Arm processors: Everything you need to know
July 17, 2020
https://www.zdnet.com/article/introducing-the-arm-processor-again-what-you-should-know-about-it-now/

The most important thing to understand about the role Arm processor architecture plays in any computing or communications market -- smartphones, personal computers, servers, or otherwise -- is this: Arm Holdings, Ltd. owns the design of its chips, and the architecture of their instruction sets, such as 64-bit Arm64. For its customers who build systems around these chips, Arm has done the hard part for them.

Arm Holdings, Ltd. does not manufacture its own chips. It has no fabrication facilities of its own. Instead, it licenses these rights to other companies, which Arm Holdings calls "partners."
These Arm partners are allowed to design the rest of their own systems, perhaps manufacture those systems -- or outsource their production to others -- and then sell them as their own.
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WHAT'S THE RELATIONSHIP BETWEEN ARM AND APPLE?
Apple Silicon is the phrase Apple presently uses to describe its own processor production, beginning last June with Apple's announcement of the replacement of its x86 Mac processor line.

Again, Arm is not the manufacturer but the designer of the processing cores and other on-chip parts. In this case, Arm isn't the designer either, but the producer of the instruction set around which Apple makes its original design.
The relationship between Apple and Arm Holdings dates back to 1990, when Apple Computer UK became a founding co-stakeholder.
What types of Arm processors are produced today?
To stay competitive, Arm offers a variety of processor core styles or series. [...]
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guest · Sep 14, 2020

mood said: ↑

Arm processors: Everything you need to know July 17, 2020
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Updated (September 14, 2020):

Introducing the ARM processor (again): What you should know about it now
After a colossal $40 billion deal with GPU maker Nvidia closes in 2021 or early 2022, there’s a good chance that Arm’s intellectual property may be part of every widely distributed processor that is not x86.
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WHAT WILL NVIDIA'S ROLE BE IN OPERATING ARM?
On September 13, Nvidia announced a deal to acquire Arm Holdings , Ltd. from its parent company, Tokyo-based Softbank Group Corp., in a cash and stock exchange valued at $40 billion. The deal is pending regulatory review in the European Union, United States, Japan, and China, in separate processes that could take as long as 18 months to conclude. [...]
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guest · Oct 7, 2020

Future Arm CPUs will drop 32-bit support, and here’s what that means
October 7, 2020
https://www.androidauthority.com/arm-64-bit-1165264/

Speaking at an Arm DevSummit keynote, Paul Williamson, VP and GM of Client Business at Arm, announced that future Arm Cortex-A CPU cores — such as those powering future smartphones — will become 64-bit only come 2022. That means no hardware support for old 32-bit applications in the future, signaling small but important implications for future smartphones and the Android OS.

If you’re worried about app support, fear not. Google has required since August 2019 that all apps submitted to Google Play are 64-bit
Isn’t Android already 64-bit?
Technically, yes. Android introduced 64-bit support with 5.0 Lollipop back in 2014, but Android and Arm’s CPU cores continue to support legacy 32-bit applications.
The benefits of moving over to 64-bit exclusively include improved performance for applications, games, and operating systems, up to 20% in some situations.

In many ways, the move to 64-bit will be business as usual. Smartphones and applications have been in a state of transition for years now. It’s about time the hardware and software both finalized the switchover. After all, Apple’s iOS 11 went 64-bit only back in 2017.
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What we know about Arm 64-bit CPUs
The big news for Arm is that it can finally drop additional silicon from its CPU designs that it has needed to support legacy 32-bit. This will save on silicon area, which could mean smaller and cooler CPU cores or more powerful features in the same size.

The codenames for Arm’s 2021 and 2022 Cortex-A CPUs are Matterhorn and Makalu, the latter of which will be making the switch to 64-bit only. Arm is promising a 30% performance uplift between 2020’s Cortex-A78 CPU and Makalu, so there are still big gains in the pipeline.
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Moving to 64-bit exclusively is a big deal for Android, developers, and Arm. It’s an important step to simplify the current tangle of legacy support. However, it’s not going to mark a fundamental change to the ecosystem and the end user’s day to day experience.
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