getloadavg(3) [redhat man page]

GETLOADAVG(3)						   BSD Library Functions Manual 					     GETLOADAVG(3)

NAME

     getloadavg -- get system load averages

SYNOPSIS

     #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.

DIAGNOSTICS

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

SEE ALSO

     uptime(1), proc(5)

HISTORY

     The getloadavg() function appeared in 4.3BSD-Reno.

4.3 Berkeley Distribution					   June 4, 1993 					 4.3 Berkeley Distribution

GETLOADAVG(3)						     Linux Programmer's Manual						     GETLOADAVG(3)

NAME

       getloadavg - get system load averages

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 sam-
       ples 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

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

       +-------------+---------------+---------+
       |Interface    | Attribute     | Value   |
       +-------------+---------------+---------+
       |getloadavg() | Thread safety | MT-Safe |
       +-------------+---------------+---------+
CONFORMING TO

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

SEE ALSO

       uptime(1), proc(5)

COLOPHON

       This  page is part of release 4.15 of the Linux man-pages project.  A description of the project, information about reporting bugs, and the
       latest version of this page, can be found at https://www.kernel.org/doc/man-pages/.

Linux								    2016-03-15							     GETLOADAVG(3)