The value by which the statistic is to be incremented. For most probes,
this argument is always 1, but for some it may take other values; these probes
are noted in Table 24–1.
arg1
A pointer to the current value of the statistic to be incremented. This
value is a 64–bit quantity that will be incremented by the value in arg0. Dereferencing this pointer allows consumers to determine the
current count of the statistic corresponding to the probe.