* Copyright (c) 1989 The Regents of the University of California.
* Redistribution and use in source and binary forms are permitted provided
* that: (1) source distributions retain this entire copyright notice and
* comment, and (2) distributions including binaries display the following
* acknowledgement: ``This product includes software developed by the
* University of California, Berkeley and its contributors'' in the
* documentation or other materials provided with the distribution and in
* all advertising materials mentioning features or use of this software.
* 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 ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid
[] = "@(#)getloadavg.c 6.2 (Berkeley) 6/29/90";
#endif /* LIBC_SCCS and not lint */
static struct nlist nl
[] = {
* getloadavg() -- Get system load averages.
* Put `nelem' samples into `loadavg' array.
* Return number of samples retrieved, or -1 on error.
getloadavg(loadavg
, nelem
)
static int need_nlist
= 1;
if ((alreadyopen
= kvm_openfiles(NULL
, NULL
, NULL
)) == -1)
if (kvm_read((off_t
)nl
[X_AVERUNNABLE
].n_value
, (char *)averunnable
,
sizeof(averunnable
)) != sizeof(averunnable
))
if (kvm_read( (off_t
)nl
[X_FSCALE
].n_value
, (char *)&fscale
,
sizeof(fscale
)) != sizeof(fscale
))
nelem
= MIN(nelem
, sizeof(averunnable
) / sizeof(averunnable
[0]));
for (i
= 0; i
< nelem
; i
++)
loadavg
[i
] = (double) averunnable
[i
] / fscale
;