path: libvirt_12.0.0-1/docs/kbase/systemtap.rst
::
   stap qmp.stp -x `pidof libvirtd`


path: libvirt_12.0.0-1/src/nwfilter/nwfilter_dhcpsnoop.c
 * Note about testing:
 *   On the host run in a shell:
 *      while :; do kill -SIGHUP `pidof libvirtd`; echo "HUP $RANDOM"; sleep 20; done
 *
 *   Inside a couple of VMs that for example use the 'clean-traffic' filter:


path: libvirt_12.0.0-1/src/nwfilter/nwfilter_dhcpsnoop.c
 *
 *   Inside a couple of VMs that for example use the 'clean-traffic' filter:
 *      while :; do kill -SIGTERM `pidof dhclient`; dhclient eth0; ifconfig eth0; done
 *
 *   On the host check the lease file and that it's periodically shortened: