RE: Check RAM usage during runtime of my application

Charlie — Thu, 02 Jan 2025 14:58:36 GMT

Hi,

Thanks for reaching us for this inqury. There are two 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 discussion 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=y
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