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NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | VERSIONS | ATTRIBUTES | CONFORMING TO | SEE ALSO | COLOPHON |
GETLOADAVG(3) Linux Programmer's Manual GETLOADAVG(3)
getloadavg - get system load averages
#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
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.
If the load average was unobtainable, -1 is returned; otherwise, the
number of samples actually retrieved is returned.
This function is available in glibc since version 2.2.
For an explanation of the terms used in this section, see
attributes(7).
┌─────────────┬───────────────┬─────────┐
│Interface │ Attribute │ Value │
├─────────────┼───────────────┼─────────┤
│getloadavg() │ Thread safety │ MT-Safe │
└─────────────┴───────────────┴─────────┘
Not in POSIX.1. Present on the BSDs and Solaris.
uptime(1), proc(5)
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Linux 2016-03-15 GETLOADAVG(3)
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