1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright 2008-2009 Stacey Son <[email protected]>
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 #include <sys/param.h>
30 #include <sys/systm.h>
31 #include <sys/lock.h>
32 #include <sys/lockstat.h>
33 #include <sys/sdt.h>
34 #include <sys/time.h>
35
36 SDT_PROVIDER_DEFINE(lockstat);
37
38 SDT_PROBE_DEFINE1(lockstat, , , adaptive__acquire, "struct mtx *");
39 SDT_PROBE_DEFINE1(lockstat, , , adaptive__release, "struct mtx *");
40 SDT_PROBE_DEFINE2(lockstat, , , adaptive__spin, "struct mtx *", "uint64_t");
41 SDT_PROBE_DEFINE2(lockstat, , , adaptive__block, "struct mtx *", "uint64_t");
42
43 SDT_PROBE_DEFINE1(lockstat, , , spin__acquire, "struct mtx *");
44 SDT_PROBE_DEFINE1(lockstat, , , spin__release, "struct mtx *");
45 SDT_PROBE_DEFINE2(lockstat, , , spin__spin, "struct mtx *", "uint64_t");
46
47 SDT_PROBE_DEFINE2(lockstat, , , rw__acquire, "struct rwlock *", "int");
48 SDT_PROBE_DEFINE2(lockstat, , , rw__release, "struct rwlock *", "int");
49 SDT_PROBE_DEFINE5(lockstat, , , rw__block, "struct rwlock *", "uint64_t", "int",
50 "int", "int");
51 SDT_PROBE_DEFINE2(lockstat, , , rw__spin, "struct rwlock *", "uint64_t");
52 SDT_PROBE_DEFINE1(lockstat, , , rw__upgrade, "struct rwlock *");
53 SDT_PROBE_DEFINE1(lockstat, , , rw__downgrade, "struct rwlock *");
54
55 SDT_PROBE_DEFINE2(lockstat, , , sx__acquire, "struct sx *", "int");
56 SDT_PROBE_DEFINE2(lockstat, , , sx__release, "struct sx *", "int");
57 SDT_PROBE_DEFINE5(lockstat, , , sx__block, "struct sx *", "uint64_t", "int",
58 "int", "int");
59 SDT_PROBE_DEFINE2(lockstat, , , sx__spin, "struct sx *", "uint64_t");
60 SDT_PROBE_DEFINE1(lockstat, , , sx__upgrade, "struct sx *");
61 SDT_PROBE_DEFINE1(lockstat, , , sx__downgrade, "struct sx *");
62
63 SDT_PROBE_DEFINE2(lockstat, , , lockmgr__acquire, "struct lock *", "int");
64 SDT_PROBE_DEFINE2(lockstat, , , lockmgr__release, "struct lock *", "int");
65 SDT_PROBE_DEFINE2(lockstat, , , lockmgr__disown, "struct lock *", "int");
66 SDT_PROBE_DEFINE5(lockstat, , , lockmgr__block, "struct lock *", "uint64_t",
67 "int", "int", "int");
68 SDT_PROBE_DEFINE1(lockstat, , , lockmgr__upgrade, "struct lock *");
69 SDT_PROBE_DEFINE1(lockstat, , , lockmgr__downgrade, "struct lock *");
70
71 SDT_PROBE_DEFINE2(lockstat, , , thread__spin, "struct mtx *", "uint64_t");
72
73 volatile bool __read_frequently lockstat_enabled;
74
75 uint64_t
lockstat_nsecs(struct lock_object * lo)76 lockstat_nsecs(struct lock_object *lo)
77 {
78 struct bintime bt;
79 uint64_t ns;
80
81 if (!lockstat_enabled)
82 return (0);
83 if ((lo->lo_flags & LO_NOPROFILE) != 0)
84 return (0);
85
86 binuptime(&bt);
87 ns = bt.sec * (uint64_t)1000000000;
88 ns += ((uint64_t)1000000000 * (uint32_t)(bt.frac >> 32)) >> 32;
89 return (ns);
90 }
91