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.\" $OpenBSD: getloadavg.3,v 1.10 2007/05/31 19:19:28 jmc Exp $
.\"
.\" Copyright (c) 1989, 1991, 1993
.\" The Regents of the University of California. All rights reserved.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
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.\" notice, this list of conditions and the following disclaimer.
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.\" notice, this list of conditions and the following disclaimer in the
.\" documentation and/or other materials provided with the distribution.
.\" 3. Neither the name of the University nor the names of its contributors
.\" may be used to endorse or promote products derived from this software
.\" without specific prior written permission.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\"
.Dd $Mdocdate: May 31 2007 $
.Dt GETLOADAVG 3
.Os
.Sh NAME
.Nm getloadavg
.Nd get system load averages
.Sh SYNOPSIS
.Fd #include <stdlib.h>
.Ft int
.Fn getloadavg "double loadavg[]" "int nelem"
.Sh DESCRIPTION
The
.Fn getloadavg
function returns the number of processes in the system run queue
averaged over various periods of time.
Up to
.Fa nelem
samples are retrieved and assigned to successive elements of
.Fa loadavg Ns Bq .
The system imposes a maximum of 3 samples, representing averages
over the last 1, 5, and 15 minutes, respectively.
.Sh RETURN VALUES
Upon successful completion, the number of samples retrieved is returned.
If an error occurs, \-1 is returned and the global variable
.Va errno
is set to indicate the error.
.Sh ERRORS
Please see
.Xr sysctl 3
for a list of possible errors.
.Sh SEE ALSO
.Xr uptime 1 ,
.Xr kvm_getloadavg 3 ,
.Xr sysctl 3
.Sh HISTORY
The
.Fn getloadavg
function appeared in
.Bx 4.3 Reno .
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