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BSD 2.11 - man page for getloadavg (bsd section 3)

GETLOADAVG(3)				       Library Functions Manual 				GETLOADAVG(3)

NAME
getloadavg - get system load averages
SYNOPSIS
getloadavg(loadavg, nelem) double loadavg[]; int nelem;
DESCRIPTION
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.
DIAGNOSTICS
If the load average was unobtainable, -1 is returned; otherwise, the number of samples actually retrieved is returned.
SEE ALSO
uptime(1), sysctl(3), sysctl(8).
HISTORY
The getloadavg function appeared in 4.3BSD-Reno. This function replaces the 2.9BSD compatibility routine getla(). 4th Berkeley Distribution January 15, 1995 GETLOADAVG(3)


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