getloadavg(3)              Library Functions Manual              getloadavg(3)

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).

       +--------------------------------------------+---------------+---------+
       |Interface                                   | Attribute     | Value   |
       +--------------------------------------------+---------------+---------+
       |getloadavg ()                               | Thread safety | MT-Safe |
       +--------------------------------------------+---------------+---------+
STANDARDS
       BSD.

HISTORY
       4.3BSD-Reno, Solaris.  glibc 2.2.

SEE ALSO
       uptime(1), proc(5)

Linux man-pages 6.7               2023-10-31                     getloadavg(3)