Watchdog interrupt

Manuel manuel.coutinho at
Fri Feb 27 16:36:28 UTC 2009

Hi all,


Have a question regarding the watchdog interrupt. I think that typically,
the watchdog interrupt should be a non-maskable interrupt, so that the
interrupts should be serviced regularly and not be dependent on the
interrupt latency. 


If the watchdog interrupt is maskable and if a problem occurs and the
interrupts are left disabled for a long period of time, the watchdog
interrupt will never be triggered and the system might not have a chance to
detect that.


The other solution would be never to disable the watchdog interrupt.


Of course, if the watchdog interrupt is non-maskable or if it never
disabled, then it must not call any RTEMS directive.


What is your opinion about this subject.


Kind regards

Manuel Coutinho

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