https://devzone.nordicsemi.com/f/nordic-q-a/36717/idle-task-behaviour-of-freertosHi, I use FreeRTOS for ble application on nRF52840. To save current consumption, I want to add __WFE() to portTASK_FUNCTION(). There is a comment in the function as below. /* It is not desirable to suspend then resume the scheduler on each iterationen-USTelligent Community 13Wed, 17 Oct 2018 08:47:36 GMThttps://devzone.nordicsemi.com/thread/153148?ContentTypeID=1Wed, 17 Oct 2018 08:47:36 GMT137ad170-7792-4731-bb38-c0d22fbe4515:62d59126-0447-417d-9c11-af33d7bad0c7Susheel Nuguru<p>It means that the calculation of the expected idle time is re calculated without the scheduler being suspended. The results are not necessarily valid since the scheduler was not suspended and it can preempt this context after the calculation and they estimated time will not be correct. But it will not create any bad side effects apart from that the device will wake little early if that happens. So not to worry too much about this.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/152193?ContentTypeID=1Tue, 09 Oct 2018 11:21:34 GMT137ad170-7792-4731-bb38-c0d22fbe4515:97a747b7-a844-4a5f-a255-e8e4a2e9e61eHaruki Kawakami<p>Thank you Aryan.</p> <p>I understand your suggestion.</p> <p>However, I want to know the meaning of &quot;Therefore, a preliminary test of the expected idle time is performed without the<br />scheduler suspended. The result here is not necessarily valid.&quot;</p> <p>Could you describe this ?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/142154?ContentTypeID=1Tue, 31 Jul 2018 12:09:44 GMT137ad170-7792-4731-bb38-c0d22fbe4515:c2c3bc5c-8f09-4c9b-9cec-8adc89bf4354Susheel Nuguru<p>If you are not using tickless idle, then I would recommend you to sleep (_WFE) in&nbsp;vApplicationIdleHook function instead to be very safe.</p><div style="clear:both;"></div>