getloadavg(3) -- Linux man page
- get system load averages
Fd #include <stdlib.h
Fn getloadavg double loadavg int nelem
function returns the number of processes in the system run queue
averaged over various periods of time.
samples are retrieved and assigned to successive elements of
Fa loadavg Ns Bq .
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.
function appeared in
BSD 4.3 Reno