getloadavg(3) - Linux manual page (original) (raw)

getloadavg(3) Library Functions Manual getloadavg(3)

NAME top

   getloadavg - get system load averages

LIBRARY top

   Standard C library (_libc_, _-lc_)

SYNOPSIS top

   **#include <stdlib.h>**

   **int getloadavg(double** _loadavg[]_**, int** _n_**);**

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 top

   The **getloadavg**() function returns the number of processes in the
   system run queue averaged over various periods of time.  Up to _n_
   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 top

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

ATTRIBUTES top

   For an explanation of the terms used in this section, see
   [attributes(7)](../man7/attributes.7.html).
   ┌──────────────────────────────────────┬───────────────┬─────────┐
   │ **Interface** │ **Attribute** │ **Value** │
   ├──────────────────────────────────────┼───────────────┼─────────┤
   │ **getloadavg**()                         │ Thread safety │ MT-Safe │
   └──────────────────────────────────────┴───────────────┴─────────┘

STANDARDS top

   BSD.

HISTORY top

   4.3BSD-Reno, Solaris.  glibc 2.2.

SEE ALSO top

   [uptime(1)](../man1/uptime.1.html), [proc(5)](../man5/proc.5.html)

COLOPHON top

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Linux man-pages 6.10 2024-11-17 getloadavg(3)