1 /*- 2 * Copyright 2008-2009 Stacey Son <sson@FreeBSD.org> 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND 14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16 * ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE 17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23 * SUCH DAMAGE. 24 */ 25 26 #include <sys/cdefs.h> 27 __FBSDID("$FreeBSD$"); 28 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, , , thread__spin, "struct mtx *", "uint64_t"); 64 65 volatile int __read_mostly lockstat_enabled; 66 67 uint64_t 68 lockstat_nsecs(struct lock_object *lo) 69 { 70 struct bintime bt; 71 uint64_t ns; 72 73 if (!lockstat_enabled) 74 return (0); 75 if ((lo->lo_flags & LO_NOPROFILE) != 0) 76 return (0); 77 78 binuptime(&bt); 79 ns = bt.sec * (uint64_t)1000000000; 80 ns += ((uint64_t)1000000000 * (uint32_t)(bt.frac >> 32)) >> 32; 81 return (ns); 82 } 83