Deferred logging with RTT

[Daniel Dakhno]

Is there any point to using deferred logging with the RTT backend?

The way I understand RTT is that it writes the message to a buffer where it is fetched via DAP, skipping the delay of UART printing.

So is there any argument for leavong deferred logging enabled?

Thanks!

[Turbo J]

The point is less stack usage for the thread that produced the message as it does not call printf() directly.

Try enabling  CONFIG_LOG_DEFAULT_LEVEL=4 or something like CONFIG_BT_LOG_LEVEL_DBG=y. Those usually produce stack overflows with default stack sizes.

[Susheel Nuguru]

Another use case might be that you do not rely on any time sensitive log so you give the CPU time to higher priority/important processing and just process the logs during less time sensitive idle times.