RE: Zephyr RAM, FLASH, CPU usage

newUser — Wed, 14 Oct 2020 09:25:47 GMT

Perfect, thank you!

RE: Zephyr RAM, FLASH, CPU usage

Vidar Berg — Wed, 14 Oct 2020 07:57:29 GMT

Hi,

As the screen-dump below shows, SES should give you a graphical display of the memory usage once the project is built.

Peripheral LBS example built for nrf52840dk_nrf52840:

CPU usage for NCS samples should be about the same for comparable nRF5 SDK examples. But if you wish to do actual profiling of the CPU usage you can enable CONFIG_CPU_LOAD option as explained below.

Enable periodic logging of CPU usage

1. Add the following config options to your prj.conf file:

# Enable CPU tracing
CONFIG_CPU_LOAD=y
CONFIG_CPU_LOAD_LOG_INTERVAL=2000
CONFIG_CPU_LOAD_LOG_PERIODIC=y

2. Add "#include <debug/cpu_load.h>" and call cpu_load_init() in your startup code (e.g. at the beginning of main())

3. Re-build the application and verify that the CPU load in percent is logged every 2 seconds.