xref: /illumos-gate/usr/src/uts/common/sys/loadavg.h (revision 6481fd49)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License (the "License").
6  * You may not use this file except in compliance with the License.
7  *
8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9  * or http://www.opensolaris.org/os/licensing.
10  * See the License for the specific language governing permissions
11  * and limitations under the License.
12  *
13  * When distributing Covered Code, include this CDDL HEADER in each
14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15  * If applicable, add the following below this CDDL HEADER, with the
16  * fields enclosed by brackets "[]" replaced with your own identifying
17  * information: Portions Copyright [yyyy] [name of copyright owner]
18  *
19  * CDDL HEADER END
20  */
21 
22 /*
23  * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
24  * Copyright 2014 Igor Kozhukhov <ikozhukhov@gmail.com>.
25  * Use is subject to license terms.
26  */
27 
28 #ifndef	_SYS_LOADAVG_H
29 #define	_SYS_LOADAVG_H
30 
31 #ifdef	__cplusplus
32 extern "C" {
33 #endif
34 
35 #define	LOADAVG_1MIN	0
36 #define	LOADAVG_5MIN	1
37 #define	LOADAVG_15MIN	2
38 
39 #define	LOADAVG_NSTATS	3
40 
41 #define	S_LOADAVG_SZ	11
42 #define	S_MOVAVG_SZ	10
43 
44 struct loadavg_s {
45 	int lg_cur;		/* current loadavg entry */
46 	unsigned int lg_len;	/* number entries recorded */
47 	hrtime_t lg_total;	/* used to temporarily hold load totals */
48 	hrtime_t lg_loads[S_LOADAVG_SZ];	/* table of recorded entries */
49 };
50 
51 #ifdef _KERNEL
52 
53 extern int getloadavg(int *, int);
54 
55 #else	/* _KERNEL */
56 
57 /*
58  * This is the user API
59  */
60 extern int getloadavg(double [], int);
61 
62 #endif	/* _KERNEL */
63 
64 #ifdef __cplusplus
65 }
66 #endif
67 
68 #endif	/* _SYS_LOADAVG_H */
69