162306a36Sopenharmony_ciThe **rtla osnoise** tool is an interface for the *osnoise* tracer. The 262306a36Sopenharmony_ci*osnoise* tracer dispatches a kernel thread per-cpu. These threads read the 362306a36Sopenharmony_citime in a loop while with preemption, softirq and IRQs enabled, thus 462306a36Sopenharmony_ciallowing all the sources of operating system noise during its execution. 562306a36Sopenharmony_ciThe *osnoise*'s tracer threads take note of the delta between each time 662306a36Sopenharmony_ciread, along with an interference counter of all sources of interference. 762306a36Sopenharmony_ciAt the end of each period, the *osnoise* tracer displays a summary of 862306a36Sopenharmony_cithe results. 9