getloadavg

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  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
       For an  explanation  of  the  terms  used  in  this  section,  see  at-
       tributes(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 5.05 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)