getloadavg - get system load averages
int getloadavg(double loadavg, int nelem);
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
Since glibc 2.19:
In glibc up to and including 2.19:
The getloadavg() function returns the number of processes in the system
run queue 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.
This function is available in glibc since version 2.2.
For an explanation of the terms used in this section, see attributes(7).
Not in POSIX.1. Present on the BSDs and Solaris.
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