Watchdog
Версия от 19:35, 28 мая 2019; RomanKulibaba (обсуждение | вклад) (Новая страница: «If the reset does not occur within a certain time interval (~15c), a power reset occurs (turning off one of the power lines for 3-4 seconds).»)
A watchdog timer or Watchdog is a hardware implemented monitoring circuit for a system hang.
It is a timer built on a separate comparator chip. The timer is periodically reset by sending an alternating signal to the timer input from the GPIO output of the processor.
If the reset does not occur within a certain time interval (~15c), a power reset occurs (turning off one of the power lines for 3-4 seconds).
В системе watchdog представлен устройством /dev/watchdog1, конфигурация watchdog-демона храниться в файле /etc/watchdog.conf