NMI watchdog functionality on Freebsd

[Sushanth Rai]

Hi,

Does freebsd have some functionality similar to  Linux's NMI watchdog ? I'm aware of ichwd driver, but that depends to WDT to be available in the hardware. Even when it is available, BIOS needs to support a mechanism to trigger a OS level recovery to get any useful information when system is really wedged (with interrupt disabled). 

With Linux's NMI, APIC is programmed to periodically generate NMI and the OS NMI handler can check for some counters and invoke panic if the counters are not updated for a while. 

Thanks,
Sushanth