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ARM claims their new Cortex-A15 will provide five times the performance of existing smart phones. So the resources and interest are definitely out there. http:
by chrisaycock 16y ago
ARM claims their new Cortex-A15 will provide five times the performance of existing smart phones. So the resources and interest are definitely out there.
http://www.arm.com/products/processors/cortex-a/cortex-a15.php http://www.arm.com/products/processors/cortex-a/cortex-a15.p...
- pohl 16y agoA factor of 5 then. How close would that put such a CPU to the slowest MacBook? (how many times faster than an iPad is a MacBook Air?)
- sp332 16y agoIt seems to be 5-7x faster, according to http://www.primatelabs.ca/blog/2010/10/macbookair_benchmarks-late-2010/ http://www.primatelabs.ca/blog/2010/10/macbookair_benchmarks...
- protomyth 16y agoProbably just as important for a MacBook replacement: "The introduction of Large Physical Address Extensions (LPAE) enables the processor to access up to 1TB of memory."
- thesz 16y agoA factor of 5. A typical improvements for microarchitecture is a factor of 2, spread between different units. For example, we could speed up full word adder (most common roadblock for higher clock frequency in current CPU's) by 10 percents, add scoreboard that allow us to issue 1.3 instructions in average load, add bypass logic that allows us to cut delay by 1/5 (5 cycles for pipeline) and we get 1.11.31.2=1.72 of our previous speed. I assume that ARM already have all those fancy bypasses and scoreboards. So how would they get that 5 times speed up? I think it will be true for some special cases, like Javascript interpreter or video decoding. I bet on JS. It is hard to speed up a mature architecture by five times.
- Geee 16y agoTrying to parse their marketing material the best I can, the 5x refers to dual-core configuration clocked at 1.5GHz. More than 8 cores are also available and with clocking from 1 to 2.5 GHz.