162306a36Sopenharmony_ciThe **rtla timerlat** tool is an interface for the *timerlat* tracer. The 262306a36Sopenharmony_ci*timerlat* tracer dispatches a kernel thread per-cpu. These threads 362306a36Sopenharmony_ciset a periodic timer to wake themselves up and go back to sleep. After 462306a36Sopenharmony_cithe wakeup, they collect and generate useful information for the 562306a36Sopenharmony_cidebugging of operating system timer latency. 662306a36Sopenharmony_ci 762306a36Sopenharmony_ciThe *timerlat* tracer outputs information in two ways. It periodically 862306a36Sopenharmony_ciprints the timer latency at the timer *IRQ* handler and the *Thread* 962306a36Sopenharmony_cihandler. It also enable the trace of the most relevant information via 1062306a36Sopenharmony_ci**osnoise:** tracepoints. 11