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)