Using SDK 15.0 and FreeRTOS 8.2.1 - stack overflow in Idle task

RE: Using SDK 15.0 and FreeRTOS 8.2.1 - stack overflow in Idle task

Susheel Nuguru — Thu, 13 Sep 2018 04:52:02 GMT

Elkana,

The thing is that i am not getting stack overflow in our examples. I believe you that you have not made any changes to the idle task but still able to trigger the stack overflow, which smells like a bug somewhere. In order for us to be able to fix it, we need to be able to reproduce it. I will send your recommendations to the team so that they also attempt to replicate the bug.

RE: Using SDK 15.0 and FreeRTOS 8.2.1 - stack overflow in Idle task

Elkana — Wed, 12 Sep 2018 06:31:37 GMT

As mentioned in the original post - increasing configMINIMAL_STACK_SIZE solves the issue.
Nevertheless, the issue is likely in the SDK (as we added no code to Idle task) and it is not very easy to find (as any stack overflow bug) - so Nordic probably want to fix it

RE: Using SDK 15.0 and FreeRTOS 8.2.1 - stack overflow in Idle task

Susheel Nuguru — Tue, 04 Sep 2018 07:12:32 GMT

can you try to increase the configMINIMAL_STACK_SIZE in your config file to see if it helps.

RE: Using SDK 15.0 and FreeRTOS 8.2.1 - stack overflow in Idle task

Elkana — Mon, 03 Sep 2018 12:40:01 GMT

I forgot to mention nothing is done in my vApplicationIdleHook.
I do use vApplicationStackOverflowHook - but this only happens AFTER the stack overflow (and use very little stack).
I am 99% sure idle task is overflowing while running SDK code.

RE: Using SDK 15.0 and FreeRTOS 8.2.1 - stack overflow in Idle task

Susheel Nuguru — Mon, 03 Sep 2018 12:24:59 GMT

not sure if you are doing a lot of processing in idle hook in your app using some stack variables. You can benchmark your stack usage using some external tools.