get system load averages
Standard C Library (libc, -lc)
() function returns the number
of processes in the system run queue averaged over various periods of time. Up
samples are retrieved and assigned
to successive elements of loadavg
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.
() function appeared in