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[Anandtech] Apple's Cyclone Microarchitecture Detailed

post #1 of 42
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Quote:
The most challenging part of last year's iPhone 5s review was piecing together details about Apple's A7 without any internal Apple assistance. I had less than a week to turn the review around and limited access to tools (much less time to develop them on my own) to figure out what Apple had done to double CPU performance without scaling frequency. The end result was an (incorrect) assumption that Apple had simply evolved its first ARMv7 architecture (codename: Swift). Based on the limited information I had at the time I assumed Apple simply addressed some low hanging fruit (e.g. memory access latency) in building Cyclone, its first 64-bit ARMv8 core. By the time the iPad Air review rolled around, I had more knowledge of what was underneath the hood:
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post #2 of 42
I'm not sure why Apple wants to keep such a tight lid on their processors and what they are capable of. You would think they would want to trumpet this kind of stuff from the rooftops but they rarely even talk about clock speed.
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post #3 of 42
Quote:
Originally Posted by Deadboy90 View Post

I'm not sure why Apple wants to keep such a tight lid on their processors and what they are capable of. You would think they would want to trumpet this kind of stuff from the rooftops but they rarely even talk about clock speed.

Idk. They could at least explain the architecture. Not like ARM will steal it immediately, they have their own designs and roadmaps that they committed to and cemented years ago.
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post #4 of 42
Have there been any Windows Phone vs. iPhone benchmarks?
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post #5 of 42
Quote:
Originally Posted by Deadboy90 View Post

I'm not sure why Apple wants to keep such a tight lid on their processors and what they are capable of. You would think they would want to trumpet this kind of stuff from the rooftops but they rarely even talk about clock speed.

Their user-base doesn't care about that stuff. Also Samsung is just lurking to one up them.
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post #6 of 42
Quote:
Originally Posted by bencher View Post

Their user-base doesn't care about that stuff. Also Samsung is just lurking to one up them.

If I'm not mistaken doesn't Samsung MAKE apples processors?
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post #7 of 42
Next gen apple will likely double the core count and implement a turbo of sorts for less threaded loads. This isn't all that hard to imagine.

I'm definitely impressed by A7. It's hanging in there with the other ARM chips with half the cores and clock speed. I don't expect it to scale as high with respect to clock speed as the others but this still leaves me amazed.
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post #8 of 42
Doesn't Altera own the trademark for Cyclone with their FPGA lineup?
   
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post #9 of 42
Quote:
Originally Posted by Artikbot View Post

Doesn't Altera own the trademark for Cyclone with their FPGA lineup?

I'm not so sure Trademarks apply to codenames, but I could be wrong.
post #10 of 42
Thread Starter 
Quote:
Originally Posted by Deadboy90 View Post

If I'm not mistaken doesn't Samsung MAKE apples processors?
They produce them, but they don't design them.
Quote:
Originally Posted by xlink View Post

Next gen apple will likely double the core count and implement a turbo of sorts for less threaded loads. This isn't all that hard to imagine.

I'm definitely impressed by A7. It's hanging in there with the other ARM chips with half the cores and clock speed. I don't expect it to scale as high with respect to clock speed as the others but this still leaves me amazed.
I'm hoping they'll keep it dual-core and just increase clock speed/IPC this year and maybe next as well if possible. And then go tri-core or quad-core.
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