Connect SDK Network_coordinator sample's RAM usage in nRF5340

[Bhavit Rajput]

I am using nRF5340 DK board to implement zigbee network.

I have just build connect SDK's zigbee example (network Coordinator) and seen utilization of RAM shown below.

App Core size utilization
1> Memory region         Used Size       Region Size     %age Used
1> FLASH:                    276256 B        976 KB              27.64%
1> SRAM:                     69048 B          512 KB             13.17%
1> IDT_LIST:                104 B              2 KB                  5.08%

So I want to know that why it is taking around 69048 bytes from RAM in application core, Is it due to zephyr OS ? , This much of initial RAM utilization will remain constant or this is due to this specific example code?

Is there any chances that after creating zigbee based project from stretch this utilization will reduced to around 20KB or less because we want around 450KB RAM for data processing?

[Øyvind]

Hello, 

Can you please provide what version of NCS you are working on? I will need to talk to our Zigbee experts and get back to you. 

Kind regards,
Øyvind

[Bhavit Rajput]

I am using 1.5.1

[Øyvind]

Hello, thanks for providing that information. You can use the ram_report function found under Optimization Tools in Zephyr. This will list all compiled objects and their RAM usage in a tabular form with bytes per symbol and the percentage it uses.

Note that I was not able to use it on my computer, but please test on your side.