+ * Please note that this function only returns an instantaneous load that may be deceiving
+ * in some scenarios. For example, imagine that an activity terminates at time t, and that
+ * another activity is created on the same host at the exact same timestamp. The load was
+ * never 0 on the simulated machine since the time did not advance between the two events.
+ * But still, if you call this function between the two events (in the simulator course), it
+ * returns 0 although there is no time (in the simulated time) where this value is valid.