Verification

To confirm the successful loading of the NMI watchdog based on PMC (PMU) after activation, run the following command within the VM:

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dmesg | grep "NMI watchdog"

The output varies based on the watchdog type:

• For a successfully loaded SDEI watchdog, the following information is displayed:

  1	SDEI NMI watchdog: SDEI Watchdog registered successfully

• In virtualized environments, the SDEI watchdog is loaded by default but will fail. The following information is displayed:

  SDEI NMI watchdog: Disable SDEI NMI Watchdog in VM

• For a successfully loaded NMI watchdog based on PMC (PMU), which is the sole viable option in virtualized environments, the following information is displayed:

  1	NMI watchdog: Enabled. Permanently consumes one hw-PMU counter.