Hey,

On 07/12/2016 07:08 PM, 신익희 wrote:
> in this condition, when scheduler wake up from low power mode and
> restart schedule?
> 
> and how to know scheduler when wake up itself?

The system gets woken up by external interrupts, e.g., a timer,
gpio-pin. That powers up the MCU and executes the corresponding
interrupt handler. Should that handler do something that wakes a thread
(calling thread_wakeup(), release a mutex, send a message or set a
thread_flag), that triggers the scheduler and then leads to a context
switch into the thread(s).

The scheduler never wakes up itself.

Kaspar
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