1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright 2008-2009 Stacey Son <sson@FreeBSD.org>
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27
28 #include <sys/cdefs.h>
29 __FBSDID("$FreeBSD$");
30
31 #include <sys/param.h>
32 #include <sys/systm.h>
33 #include <sys/lock.h>
34 #include <sys/lockstat.h>
35 #include <sys/sdt.h>
36 #include <sys/time.h>
37
38 SDT_PROVIDER_DEFINE(lockstat);
39
40 SDT_PROBE_DEFINE1(lockstat, , , adaptive__acquire, "struct mtx *");
41 SDT_PROBE_DEFINE1(lockstat, , , adaptive__release, "struct mtx *");
42 SDT_PROBE_DEFINE2(lockstat, , , adaptive__spin, "struct mtx *", "uint64_t");
43 SDT_PROBE_DEFINE2(lockstat, , , adaptive__block, "struct mtx *", "uint64_t");
44
45 SDT_PROBE_DEFINE1(lockstat, , , spin__acquire, "struct mtx *");
46 SDT_PROBE_DEFINE1(lockstat, , , spin__release, "struct mtx *");
47 SDT_PROBE_DEFINE2(lockstat, , , spin__spin, "struct mtx *", "uint64_t");
48
49 SDT_PROBE_DEFINE2(lockstat, , , rw__acquire, "struct rwlock *", "int");
50 SDT_PROBE_DEFINE2(lockstat, , , rw__release, "struct rwlock *", "int");
51 SDT_PROBE_DEFINE5(lockstat, , , rw__block, "struct rwlock *", "uint64_t", "int",
52 "int", "int");
53 SDT_PROBE_DEFINE2(lockstat, , , rw__spin, "struct rwlock *", "uint64_t");
54 SDT_PROBE_DEFINE1(lockstat, , , rw__upgrade, "struct rwlock *");
55 SDT_PROBE_DEFINE1(lockstat, , , rw__downgrade, "struct rwlock *");
56
57 SDT_PROBE_DEFINE2(lockstat, , , sx__acquire, "struct sx *", "int");
58 SDT_PROBE_DEFINE2(lockstat, , , sx__release, "struct sx *", "int");
59 SDT_PROBE_DEFINE5(lockstat, , , sx__block, "struct sx *", "uint64_t", "int",
60 "int", "int");
61 SDT_PROBE_DEFINE2(lockstat, , , sx__spin, "struct sx *", "uint64_t");
62 SDT_PROBE_DEFINE1(lockstat, , , sx__upgrade, "struct sx *");
63 SDT_PROBE_DEFINE1(lockstat, , , sx__downgrade, "struct sx *");
64
65 SDT_PROBE_DEFINE2(lockstat, , , lockmgr__acquire, "struct lock *", "int");
66 SDT_PROBE_DEFINE2(lockstat, , , lockmgr__release, "struct lock *", "int");
67 SDT_PROBE_DEFINE2(lockstat, , , lockmgr__disown, "struct lock *", "int");
68 SDT_PROBE_DEFINE5(lockstat, , , lockmgr__block, "struct lock *", "uint64_t",
69 "int", "int", "int");
70 SDT_PROBE_DEFINE1(lockstat, , , lockmgr__upgrade, "struct lock *");
71 SDT_PROBE_DEFINE1(lockstat, , , lockmgr__downgrade, "struct lock *");
72
73 SDT_PROBE_DEFINE2(lockstat, , , thread__spin, "struct mtx *", "uint64_t");
74
75 volatile bool __read_frequently lockstat_enabled;
76
77 uint64_t
78 lockstat_nsecs(struct lock_object *lo)
79 {
80 struct bintime bt;
81 uint64_t ns;
82
83 if (!lockstat_enabled)
84 return (0);
85 if ((lo->lo_flags & LO_NOPROFILE) != 0)
86 return (0);
87
88 binuptime(&bt);
89 ns = bt.sec * (uint64_t)1000000000;
90 ns += ((uint64_t)1000000000 * (uint32_t)(bt.frac >> 32)) >> 32;
91 return (ns);
92 }
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