FreeBSD/Linux Kernel Cross Reference
sys/kern/subr_evcnt.c
1 /* $NetBSD: subr_evcnt.c,v 1.4 2005/12/11 12:24:30 christos Exp $ */
2
3 /*
4 * Copyright (c) 1996, 2000 Christopher G. Demetriou
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. All advertising materials mentioning features or use of this software
16 * must display the following acknowledgement:
17 * This product includes software developed for the
18 * NetBSD Project. See http://www.NetBSD.org/ for
19 * information about NetBSD.
20 * 4. The name of the author may not be used to endorse or promote products
21 * derived from this software without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
24 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
25 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
26 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
27 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
28 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
29 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
30 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
31 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
32 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 *
34 * --(license Id: LICENSE.proto,v 1.1 2000/06/13 21:40:26 cgd Exp )--
35 */
36
37 /*
38 * Copyright (c) 1992, 1993
39 * The Regents of the University of California. All rights reserved.
40 *
41 * This software was developed by the Computer Systems Engineering group
42 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
43 * contributed to Berkeley.
44 *
45 * All advertising materials mentioning features or use of this software
46 * must display the following acknowledgement:
47 * This product includes software developed by the University of
48 * California, Lawrence Berkeley Laboratories.
49 *
50 * Redistribution and use in source and binary forms, with or without
51 * modification, are permitted provided that the following conditions
52 * are met:
53 * 1. Redistributions of source code must retain the above copyright
54 * notice, this list of conditions and the following disclaimer.
55 * 2. Redistributions in binary form must reproduce the above copyright
56 * notice, this list of conditions and the following disclaimer in the
57 * documentation and/or other materials provided with the distribution.
58 * 3. Neither the name of the University nor the names of its contributors
59 * may be used to endorse or promote products derived from this software
60 * without specific prior written permission.
61 *
62 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
63 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
64 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
65 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
66 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
67 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
68 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
69 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
70 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
71 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
72 * SUCH DAMAGE.
73 *
74 * from: Header: subr_autoconf.c,v 1.12 93/02/01 19:31:48 torek Exp (LBL)
75 *
76 * @(#)subr_autoconf.c 8.3 (Berkeley) 5/17/94
77 */
78
79 #include <sys/cdefs.h>
80 __KERNEL_RCSID(0, "$NetBSD: subr_evcnt.c,v 1.4 2005/12/11 12:24:30 christos Exp $");
81
82 #include "opt_ddb.h"
83
84 #include <sys/param.h>
85 #include <sys/device.h>
86 #include <sys/systm.h>
87
88 /* list of all events */
89 struct evcntlist allevents = TAILQ_HEAD_INITIALIZER(allevents);
90
91 /*
92 * We need a dummy object to stuff into the evcnt link set to
93 * ensure that there always is at least one object in the set.
94 */
95 static struct evcnt dummy_static_evcnt;
96 __link_set_add_bss(evcnts, dummy_static_evcnt);
97
98 /*
99 * Initialize event counters. This does the attach procedure for
100 * each of the static event counters in the "evcnts" link set.
101 */
102 void
103 evcnt_init(void)
104 {
105 __link_set_decl(evcnts, struct evcnt);
106 struct evcnt * const *evp;
107
108 __link_set_foreach(evp, evcnts) {
109 if (*evp == &dummy_static_evcnt)
110 continue;
111 evcnt_attach_static(*evp);
112 }
113 }
114
115 /*
116 * Attach a statically-initialized event. The type and string pointers
117 * are already set up.
118 */
119 void
120 evcnt_attach_static(struct evcnt *ev)
121 {
122 int len;
123
124 len = strlen(ev->ev_group);
125 #ifdef DIAGNOSTIC
126 if (len >= EVCNT_STRING_MAX) /* ..._MAX includes NUL */
127 panic("evcnt_attach_static: group length (%s)", ev->ev_group);
128 #endif
129 ev->ev_grouplen = len;
130
131 len = strlen(ev->ev_name);
132 #ifdef DIAGNOSTIC
133 if (len >= EVCNT_STRING_MAX) /* ..._MAX includes NUL */
134 panic("evcnt_attach_static: name length (%s)", ev->ev_name);
135 #endif
136 ev->ev_namelen = len;
137
138 TAILQ_INSERT_TAIL(&allevents, ev, ev_list);
139 }
140
141 /*
142 * Attach a dynamically-initialized event. Zero it, set up the type
143 * and string pointers and then act like it was statically initialized.
144 */
145 void
146 evcnt_attach_dynamic(struct evcnt *ev, int type, const struct evcnt *parent,
147 const char *group, const char *name)
148 {
149
150 memset(ev, 0, sizeof *ev);
151 ev->ev_type = type;
152 ev->ev_parent = parent;
153 ev->ev_group = group;
154 ev->ev_name = name;
155 evcnt_attach_static(ev);
156 }
157
158 /*
159 * Detach an event.
160 */
161 void
162 evcnt_detach(struct evcnt *ev)
163 {
164
165 TAILQ_REMOVE(&allevents, ev, ev_list);
166 }
167
168 #ifdef DDB
169 void
170 event_print(int full, void (*pr)(const char *, ...))
171 {
172 struct evcnt *evp;
173
174 TAILQ_FOREACH(evp, &allevents, ev_list) {
175 if (evp->ev_count == 0 && !full)
176 continue;
177
178 (*pr)("evcnt type %d: %s %s = %lld\n", evp->ev_type,
179 evp->ev_group, evp->ev_name, evp->ev_count);
180 }
181 }
182 #endif /* DDB */
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