CentOS 7.0 - man page for getloadavg (centos section 3)
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GETLOADAVG(3) Linux Programmer's Manual GETLOADAVG(3)
getloadavg - get system load averages
#define _BSD_SOURCE /* See feature_test_macros(7) */
int getloadavg(double loadavg, int nelem);
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 succes-
sive elements of loadavg. The system imposes a maximum of 3 samples, representing aver-
ages 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.
Not in POSIX.1-2001. Present on the BSDs and Solaris.
This page is part of release 3.53 of the Linux man-pages project. A description of the
project, and information about reporting bugs, can be found at
Linux 2007-12-08 GETLOADAVG(3)
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