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, , , thread__spin, "struct mtx *", "uint64_t"); 66 67 volatile bool __read_frequently lockstat_enabled; 68 69 uint64_t 70 lockstat_nsecs(struct lock_object *lo) 71 { 72 struct bintime bt; 73 uint64_t ns; 74 75 if (!lockstat_enabled) 76 return (0); 77 if ((lo->lo_flags & LO_NOPROFILE) != 0) 78 return (0); 79 80 binuptime(&bt); 81 ns = bt.sec * (uint64_t)1000000000; 82 ns += ((uint64_t)1000000000 * (uint32_t)(bt.frac >> 32)) >> 32; 83 return (ns); 84 } 85