Check RAM usage during runtime of my application

[sunnysunday]

Using the nRF Connect Desktop application and the nRF Connect SDK for my nRF9160dk.

I would like to monitor RAM usage during runtime of my program. In particular I am interested in the peak memory usage of certain parts of my code.

Is there a way to achieve this? 

[Charlie]

Hi,

Thanks for reaching us for this inqury. There are to tools you may used for RAM usage monitoring.

Heap Listener: You can set up a heap listener for the Zephyr kernel heap. This allows you to manually check heap usage. Zephyr Heap Listener

See discission here (99+) Default system heap listener - Nordic Q&A - Nordic DevZone - Nordic DevZone. and Zephyr Heap Listener API.

Thread Analyzer: You can also use the Thread Analyzer module to monitor stack usage for individual threads. To enable this, add the following to your prj.conf file:

CONFIG_THREAD_ANALYZER=n
CONFIG_THREAD_ANALYZER_USE_PRINTK=y
CONFIG_THREAD_ANALYZER_AUTO=y
CONFIG_THREAD_ANALYZER_AUTO_INTERVAL=5

Then use the UART shell command kernel stacks to see statistics for each running thread, including peak usage. This can help you set proper stack sizes and optimize RAM usage. 

I have used both of them in charlieshao5189/nordic_wifi_opus_audio_demo: A demo for Wi-Fi Audio based on nRF5340 Audio DK + nRF7002 EK, you can check how they are used in a NCS project.

Best regards,

Charlie