Quote:
Originally Posted by HarryT
It's "running" in the sense that it's waiting for an interrupt; device drivers, at least, are running. It's not "powered off" is what I meant.
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Nothing should be running. The CPU itself is put into a low power state where code can't execute if they are doing it right. It can be woken up for processing of incoming data off the cell modem via the interrupt, and return back to sleep after that.
It may be a minor distinction from a concept perspective, it's huge when it comes to the power consumption. Of course, it's gotten complicated lately now that we have processors that can put
parts of itself to sleep while actually running in order to conserve power, but these are still fairly high power states compared to a full-sleep.
/pedantic