Output debugging information about the guest vCPUs and vdevs
debug
None
Information output by debug goes to whatever destination is specified by the logger option's info filter (see logger in this chapter). If no output destination is specified for the logger info filter, debug output goes to slogger2.
To generate debug information, after the qvm process instance has started send it a SIGUSR1 signal. The qvm process instance will output debug information, then immediately continue.
In most cases, you would specify the debug component in your command-line startup instructions when you need it, rather than specifying it in a configuration file.