How does power constraints influence mobile system design? From these two designs, I think maybe NVIDIA uses a more powerful core and Apple A7 uses more lower power cores? Is this slide an example of slide 29?
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idl
What I find really interesting about the Apple A7 is that it includes multiple 'sections' within it. Not just does it contain the processor, it also contains the 'enclave' that stores the fingerprint data for the iPhone 5s, and also the activity tracking chip too.
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yihuaf
@jinghuan This is not related to the idea presented on slide 29. This slide presents a trade off in system design in the context of mobile where power efficiency is crucial. Apple uses only dual-core, yet the entire system performance can rival that of a system with quad-core. On the other hand, a dual-core consumes less energy than a quad-core. As @idl mentioned, Apple builds many specialized circuitry such as activity tracking inside to compensate for the performance lost from using a dual-core.
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cwswanso
In situations like these where saving energy is a high priority, do processors still do things like run all arithmetic operations every clock cycle? Is that at all more expensive than running only one?
How does power constraints influence mobile system design? From these two designs, I think maybe NVIDIA uses a more powerful core and Apple A7 uses more lower power cores? Is this slide an example of slide 29?
This comment was marked helpful 0 times.
What I find really interesting about the Apple A7 is that it includes multiple 'sections' within it. Not just does it contain the processor, it also contains the 'enclave' that stores the fingerprint data for the iPhone 5s, and also the activity tracking chip too.
This comment was marked helpful 1 times.
@jinghuan This is not related to the idea presented on slide 29. This slide presents a trade off in system design in the context of mobile where power efficiency is crucial. Apple uses only dual-core, yet the entire system performance can rival that of a system with quad-core. On the other hand, a dual-core consumes less energy than a quad-core. As @idl mentioned, Apple builds many specialized circuitry such as activity tracking inside to compensate for the performance lost from using a dual-core.
This comment was marked helpful 0 times.
In situations like these where saving energy is a high priority, do processors still do things like run all arithmetic operations every clock cycle? Is that at all more expensive than running only one?
This comment was marked helpful 0 times.