On 2018-12-03, Ranran <ranshalit@xxxxxxxxx> wrote: >>> 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 > > Still, about the 2nd example above, it is intended to use for testing > RT latency, but there is no priority setting in yet. > Do you think it was meant to be executed together with chrt, or is it > that it is not required to set priority because there are no threads > in that example ? The 2nd example is basically a minimal cyclictest(8) implementation. In my opinion, it probably only makes sense to run that application with chrt(1). For example: sudo chrt -p 98 ./rttest Choosing a lower priority might be useful if the tester is interested in latencies _at that priority_. John Ogness
