Hello, I've found 2 examples for RT applications: 1. https://wiki.linuxfoundation.org/realtime/documentation/howto/applications/application_base 2. https://github.com/emagii/training-materials/blob/master/lab-data/realtime/rttest/data/rttest.c In the 2nd example there is no usage of rt priority or threads. So, I don't understand: What makes application RT ? Isn't it required to use RT priority ? If so, why does the 2nd example doesn't use it ? Thank you, ran