www.LinuxHowtos.org

getloadavg

Section: C Library Functions (3)
Updated: 202-0-21
Index Return to Main Contents

NAME

getloadavg - get system load averages

LIBRARY

Standard C library (libc,~-lc)

SYNOPSIS

#include <stdlib.h>
int getloadavg(double loadavg[], int n);

Feature Test Macro Requirements for glibc (see feature_test_macros(7)): getloadavg():

    Since glibc 2.19:
        _DEFAULT_SOURCE
    In glibc up to and including 2.19:
        _BSD_SOURCE

DESCRIPTION

The getloadavg() function returns the number of processes in the system run queue averaged over various periods of time. Up to n 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.

ATTRIBUTES

For an explanation of the terms used in this section, see attributes(7).

Interface	Attribute	Value
getloadavg()	Thread safety	M-Safe

STANDARDS

BSD.

HISTORY

4.3BS-Reno, Solaris. glibc 2.2.