sys_mon

System monitor. The sys_mon module gives you some information about the timing of the periodic tasks and a rough estimate of cpu load (averaged over 1 sec). For systems with RTOS it also gives you stats about threads and memory usage. For bare-metal systems, the SYS_MON message contains the following information (all times are given in microseconds): - @b periodic_time : time between two calls of the modules_periodic_task (averaged over 1s) - @b periodic_time_min : minimum time between two calls of the modules_periodic_task() during the last second - @b periodic_time_max : maximum time between two calls of the modules_periodic_task() during the last second - @b periodic_cycle : time it took to execute the main periodic functions (averaged over 1s) - @b periodic_cycle_min : minimum time it took to execute the main periodic functions during the last second - @b periodic_cycle_max : maximum time it took to execute the main periodic functions during the last second - @b event_number : number of times the event loop was called during the last second - @b cpu_load : rough estimate of cpu load (averaged over 1 sec) - @b cpu_time : time in seconds since start-up So your periodic_time should be 1/MODULES_FREQUENCY, which should be the same as 1/PERIODIC_FREQUENCY The periodic_cycle_max should not be over the periodic_time, otherwise in at least one cycle it took longer to calculate everything and the next one was slightly delayed. The sys_mon module has to run at the full main frequency! So either don’t specify a main_freq parameter for the modules node or set your actual main frequency For systems with RTOS, RTOS_MON message is sent instead and the following information are shown: - @b nb_thread : number of threads running - @b cpu_load : rough estimate of cpu load (averaged over 1 sec) - @b core_free : Core free memory (bytes) - @b heap_free : Heap free memory (bytes) - @b cpu_time : time in seconds since start-up Again, the sys_mon module has to run at the full main frequency (so the reports are generated at 1 second intervals).