> +Virtual devices can also use realtime clock for the events that do not change > +the guest state directly. When the clock ticking should depend on VM execution > +speed, use virtual ext clock. It is not deterministic, but its speed depends > +on the guest execution. This clock is used by the virtual devices (e.g., > +slirp routing device) that lie outside the replayed guest.
Virtual ext clock replaced with virtual clock timers having EXTERNAL attribute.