getloadavg

Section: C Library Functions (3)
Updated: 2022-12-15
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NAME

getloadavg - get system load averages  

LIBRARY

Standard C library (libc, -lc)  

SYNOPSIS

#include <stdlib.h>

int getloadavg(double loadavg[], int nelem);

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 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 since glibc 2.2.  

ATTRIBUTES

For an explanation of the terms used in this section, see attributes(7).
InterfaceAttributeValue
getloadavg() Thread safetyMT-Safe

 

STANDARDS

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

SEE ALSO

uptime(1), proc(5)

 

Index

NAME
LIBRARY
SYNOPSIS
DESCRIPTION
RETURN VALUE
VERSIONS
ATTRIBUTES
STANDARDS
SEE ALSO
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