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.
VERSIONS
This function is available since glibc 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 │
└────────────────────────────────────────────┴───────────────┴─────────┘
STANDARDS
Not in POSIX.1. Present on the BSDs and Solaris.
SEE ALSO
uptime(1), proc(5)
Linux man-pages 6.03 2022-12-15 getloadavg(3)
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