getloadavg - get system load averages

NAME  LIBRARY  SYNOPSIS  DESCRIPTION  RETURN VALUE  ATTRIBUTES  STANDARDS  HISTORY  SEE ALSO 

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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.

ATTRIBUTES

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

STANDARDS

BSD.

HISTORY

4.3BSD-Reno, Solaris. glibc 2.2.

SEE ALSO

uptime(1), proc(5)

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