getloadavg: Get system load averages

SYNOPSIS

#define _BSD_SOURCE         /* See feature_test_macros(7) */
#include <stdlib.h>

int getloadavg(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.

RETURN VALUE

If the load average was unobtainable, -1 is returned; otherwise, the number of samples actually retrieved is returned.

VERSIONS

This function is available in glibc since version 2.2.

ATTRIBUTES

Multithreading (see pthreads(7))

The getloadavg() function is thread-safe.

CONFORMING TO

Not in POSIX.1-2001. Present on the BSDs and Solaris.

RELATED TO getloadavg…

uptime(1), proc(5)

COLOPHON

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getloadavg (3)