get load average of the
function returns the number of processes in the system run queue of the
kernel indicated by kd, averaged over various periods
of time. Up to nelem samples are retrieved and
assigned to successive elements of loadavg. The
system imposes a maximum of 3 samples, representing averages over the last
1, 5, and 15 minutes, respectively.
If the load average was unobtainable, -1 is returned. Otherwise, the number of samples actually retrieved is returned.
uptime(1), getloadavg(3), kvm(3)