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 2009 Sun Microsystems, Inc.  All rights reserved.
24  * Use is subject to license terms.
25  */
26 
27 #ifndef	_SYS_CPUCAPS_IMPL_H
28 #define	_SYS_CPUCAPS_IMPL_H
29 
30 #ifdef	__cplusplus
31 extern "C" {
32 #endif
33 
34 #ifdef _KERNEL
35 
36 #include <sys/kstat.h>
37 #include <sys/cpucaps.h>
38 #include <sys/list.h>
39 #include <sys/time.h>
40 #include <sys/waitq.h>
41 
42 /*
43  * When resource control framework sets the cap to NOCAP value the cap
44  * is disabled.
45  */
46 #define	NOCAP	MAXCAP
47 
48 /*
49  * Maximum value for the cap usage. Should be the maximum value for hrtime_t
50  */
51 #if defined(_LP64)
52 #define	MAX_USAGE LONG_MAX
53 #else
54 #define	MAX_USAGE 9223372036854775807LL
55 #endif
56 
57 
58 /*
59  * Most of the per-project or per-zone state related to CPU caps is kept in the
60  * cpucap_t structure.
61  */
62 typedef struct cpucap {
63 	list_node_t	cap_link;	/* next/prev capped entity	*/
64 	struct kproject	*cap_project;	/* project for the cap		*/
65 	struct zone	*cap_zone;	/* zone for the cap		*/
66 	waitq_t		cap_waitq;	/* waitq for capped threads	*/
67 	kstat_t		*cap_kstat;	/* cpucaps specific kstat	*/
68 	int64_t		cap_gen;	/* zone cap specific 		*/
69 	hrtime_t	cap_value;	/* scaled CPU usage cap		*/
70 	hrtime_t	cap_usage;	/* current CPU usage		*/
71 	disp_lock_t	cap_usagelock;	/* protects cap_usage above	*/
72 	/*
73 	 * Per cap statistics.
74 	 */
75 	hrtime_t	cap_maxusage;	/* maximum cap usage		*/
76 	u_longlong_t	cap_below;	/* # of ticks spend below the cap */
77 	u_longlong_t	cap_above;	/* # of ticks spend above the cap */
78 } cpucap_t;
79 
80 /*
81  * Wrapper macros for checking cap state.
82  */
83 #define	CAP_ENABLED(cap) ((cap)->cap_value != 0)
84 #define	CAP_DISABLED(cap) (!CAP_ENABLED(cap))
85 
86 #define	PROJECT_IS_CAPPED(project) \
87 	(((project)->kpj_cpucap != NULL) && \
88 	CAP_ENABLED((project)->kpj_cpucap))
89 
90 #define	ZONE_IS_CAPPED(zone) \
91 	(((zone)->zone_cpucap != NULL) && \
92 	CAP_ENABLED((zone)->zone_cpucap))
93 
94 #endif	/* _KERNEL */
95 
96 #ifdef	__cplusplus
97 }
98 #endif
99 
100 #endif	/* _SYS_CPUCAPS_IMPL_H */
101