1994-05-27 05:00:24 +00:00
|
|
|
/*-
|
|
|
|
|
* Copyright (c) 1989, 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:
|
|
|
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
|
|
|
* notice, this list of conditions and the following disclaimer.
|
|
|
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
|
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
|
|
|
* documentation and/or other materials provided with the distribution.
|
|
|
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
|
|
|
* must display the following acknowledgement:
|
|
|
|
|
* This product includes software developed by the University of
|
|
|
|
|
* California, Berkeley and its contributors.
|
|
|
|
|
* 4. 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
|
|
|
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
|
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
|
|
|
* 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
|
|
|
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
|
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
|
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
|
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
|
|
|
* SUCH DAMAGE.
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
#if defined(LIBC_SCCS) && !defined(lint)
|
|
|
|
|
static char sccsid[] = "@(#)getloadavg.c 8.1 (Berkeley) 6/4/93";
|
|
|
|
|
#endif /* LIBC_SCCS and not lint */
|
2002-03-22 21:53:29 +00:00
|
|
|
#include <sys/cdefs.h>
|
|
|
|
|
__FBSDID("$FreeBSD$");
|
1994-05-27 05:00:24 +00:00
|
|
|
|
|
|
|
|
#include <sys/param.h>
|
|
|
|
|
#include <sys/time.h>
|
|
|
|
|
#include <sys/resource.h>
|
|
|
|
|
#include <sys/sysctl.h>
|
|
|
|
|
#include <vm/vm_param.h>
|
|
|
|
|
|
|
|
|
|
#include <stdlib.h>
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* getloadavg() -- Get system load averages.
|
|
|
|
|
*
|
|
|
|
|
* Put `nelem' samples into `loadavg' array.
|
|
|
|
|
* Return number of samples retrieved, or -1 on error.
|
|
|
|
|
*/
|
|
|
|
|
int
|
|
|
|
|
getloadavg(loadavg, nelem)
|
|
|
|
|
double loadavg[];
|
|
|
|
|
int nelem;
|
|
|
|
|
{
|
|
|
|
|
struct loadavg loadinfo;
|
|
|
|
|
int i, mib[2];
|
|
|
|
|
size_t size;
|
|
|
|
|
|
|
|
|
|
mib[0] = CTL_VM;
|
|
|
|
|
mib[1] = VM_LOADAVG;
|
|
|
|
|
size = sizeof(loadinfo);
|
|
|
|
|
if (sysctl(mib, 2, &loadinfo, &size, NULL, 0) < 0)
|
|
|
|
|
return (-1);
|
|
|
|
|
|
|
|
|
|
nelem = MIN(nelem, sizeof(loadinfo.ldavg) / sizeof(fixpt_t));
|
|
|
|
|
for (i = 0; i < nelem; i++)
|
|
|
|
|
loadavg[i] = (double) loadinfo.ldavg[i] / loadinfo.fscale;
|
|
|
|
|
return (nelem);
|
|
|
|
|
}
|
