1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
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/param.h>
29 #include <sys/systm.h>
30 #include <sys/lock.h>
31 #include <sys/lockstat.h>
32 #include <sys/sdt.h>
33 #include <sys/time.h>
34
35 SDT_PROVIDER_DEFINE(lockstat);
36
37 SDT_PROBE_DEFINE1(lockstat, , , adaptive__acquire, "struct mtx *");
38 SDT_PROBE_DEFINE1(lockstat, , , adaptive__release, "struct mtx *");
39 SDT_PROBE_DEFINE2(lockstat, , , adaptive__spin, "struct mtx *", "uint64_t");
40 SDT_PROBE_DEFINE2(lockstat, , , adaptive__block, "struct mtx *", "uint64_t");
41
42 SDT_PROBE_DEFINE1(lockstat, , , spin__acquire, "struct mtx *");
43 SDT_PROBE_DEFINE1(lockstat, , , spin__release, "struct mtx *");
44 SDT_PROBE_DEFINE2(lockstat, , , spin__spin, "struct mtx *", "uint64_t");
45
46 SDT_PROBE_DEFINE2(lockstat, , , rw__acquire, "struct rwlock *", "int");
47 SDT_PROBE_DEFINE2(lockstat, , , rw__release, "struct rwlock *", "int");
48 SDT_PROBE_DEFINE5(lockstat, , , rw__block, "struct rwlock *", "uint64_t", "int",
49 "int", "int");
50 SDT_PROBE_DEFINE2(lockstat, , , rw__spin, "struct rwlock *", "uint64_t");
51 SDT_PROBE_DEFINE1(lockstat, , , rw__upgrade, "struct rwlock *");
52 SDT_PROBE_DEFINE1(lockstat, , , rw__downgrade, "struct rwlock *");
53
54 SDT_PROBE_DEFINE2(lockstat, , , sx__acquire, "struct sx *", "int");
55 SDT_PROBE_DEFINE2(lockstat, , , sx__release, "struct sx *", "int");
56 SDT_PROBE_DEFINE5(lockstat, , , sx__block, "struct sx *", "uint64_t", "int",
57 "int", "int");
58 SDT_PROBE_DEFINE2(lockstat, , , sx__spin, "struct sx *", "uint64_t");
59 SDT_PROBE_DEFINE1(lockstat, , , sx__upgrade, "struct sx *");
60 SDT_PROBE_DEFINE1(lockstat, , , sx__downgrade, "struct sx *");
61
62 SDT_PROBE_DEFINE2(lockstat, , , lockmgr__acquire, "struct lock *", "int");
63 SDT_PROBE_DEFINE2(lockstat, , , lockmgr__release, "struct lock *", "int");
64 SDT_PROBE_DEFINE2(lockstat, , , lockmgr__disown, "struct lock *", "int");
65 SDT_PROBE_DEFINE5(lockstat, , , lockmgr__block, "struct lock *", "uint64_t",
66 "int", "int", "int");
67 SDT_PROBE_DEFINE1(lockstat, , , lockmgr__upgrade, "struct lock *");
68 SDT_PROBE_DEFINE1(lockstat, , , lockmgr__downgrade, "struct lock *");
69
70 SDT_PROBE_DEFINE2(lockstat, , , thread__spin, "struct mtx *", "uint64_t");
71
72 volatile bool __read_frequently lockstat_enabled;
73
74 uint64_t
lockstat_nsecs(struct lock_object * lo)75 lockstat_nsecs(struct lock_object *lo)
76 {
77 struct bintime bt;
78 uint64_t ns;
79
80 if (!lockstat_enabled)
81 return (0);
82 if ((lo->lo_flags & LO_NOPROFILE) != 0)
83 return (0);
84
85 binuptime(&bt);
86 ns = bt.sec * (uint64_t)1000000000;
87 ns += ((uint64_t)1000000000 * (uint32_t)(bt.frac >> 32)) >> 32;
88 return (ns);
89 }
90