1192853Ssson/*- 2192853Ssson * Copyright 2008-2009 Stacey Son <sson@FreeBSD.org> 3192853Ssson * 4192853Ssson * Redistribution and use in source and binary forms, with or without 5192853Ssson * modification, are permitted provided that the following conditions 6192853Ssson * are met: 7192853Ssson * 1. Redistributions of source code must retain the above copyright 8192853Ssson * notice, this list of conditions and the following disclaimer. 9192853Ssson * 2. Redistributions in binary form must reproduce the above copyright 10192853Ssson * notice, this list of conditions and the following disclaimer in the 11192853Ssson * documentation and/or other materials provided with the distribution. 12192853Ssson * 13192853Ssson * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND 14192853Ssson * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15192853Ssson * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16192853Ssson * ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE 17192853Ssson * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18192853Ssson * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19192853Ssson * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20192853Ssson * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21192853Ssson * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22192853Ssson * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23192853Ssson * SUCH DAMAGE. 24192853Ssson */ 25192853Ssson 26285703Smarkj#include <sys/cdefs.h> 27285703Smarkj__FBSDID("$FreeBSD: stable/11/sys/kern/kern_lockstat.c 327409 2017-12-31 03:35:34Z mjg $"); 28192853Ssson 29285703Smarkj#include <sys/param.h> 30315339Smjg#include <sys/systm.h> 31285664Smarkj#include <sys/lock.h> 32192853Ssson#include <sys/lockstat.h> 33285703Smarkj#include <sys/sdt.h> 34285664Smarkj#include <sys/time.h> 35192853Ssson 36285703SmarkjSDT_PROVIDER_DEFINE(lockstat); 37285703Smarkj 38285703SmarkjSDT_PROBE_DEFINE1(lockstat, , , adaptive__acquire, "struct mtx *"); 39285703SmarkjSDT_PROBE_DEFINE1(lockstat, , , adaptive__release, "struct mtx *"); 40285703SmarkjSDT_PROBE_DEFINE2(lockstat, , , adaptive__spin, "struct mtx *", "uint64_t"); 41285703SmarkjSDT_PROBE_DEFINE2(lockstat, , , adaptive__block, "struct mtx *", "uint64_t"); 42285703Smarkj 43285703SmarkjSDT_PROBE_DEFINE1(lockstat, , , spin__acquire, "struct mtx *"); 44285703SmarkjSDT_PROBE_DEFINE1(lockstat, , , spin__release, "struct mtx *"); 45285703SmarkjSDT_PROBE_DEFINE2(lockstat, , , spin__spin, "struct mtx *", "uint64_t"); 46285703Smarkj 47285704SmarkjSDT_PROBE_DEFINE2(lockstat, , , rw__acquire, "struct rwlock *", "int"); 48285704SmarkjSDT_PROBE_DEFINE2(lockstat, , , rw__release, "struct rwlock *", "int"); 49285703SmarkjSDT_PROBE_DEFINE5(lockstat, , , rw__block, "struct rwlock *", "uint64_t", "int", 50285703Smarkj "int", "int"); 51285703SmarkjSDT_PROBE_DEFINE2(lockstat, , , rw__spin, "struct rwlock *", "uint64_t"); 52285703SmarkjSDT_PROBE_DEFINE1(lockstat, , , rw__upgrade, "struct rwlock *"); 53285703SmarkjSDT_PROBE_DEFINE1(lockstat, , , rw__downgrade, "struct rwlock *"); 54285703Smarkj 55285704SmarkjSDT_PROBE_DEFINE2(lockstat, , , sx__acquire, "struct sx *", "int"); 56285704SmarkjSDT_PROBE_DEFINE2(lockstat, , , sx__release, "struct sx *", "int"); 57285703SmarkjSDT_PROBE_DEFINE5(lockstat, , , sx__block, "struct sx *", "uint64_t", "int", 58285703Smarkj "int", "int"); 59285703SmarkjSDT_PROBE_DEFINE2(lockstat, , , sx__spin, "struct sx *", "uint64_t"); 60285703SmarkjSDT_PROBE_DEFINE1(lockstat, , , sx__upgrade, "struct sx *"); 61285703SmarkjSDT_PROBE_DEFINE1(lockstat, , , sx__downgrade, "struct sx *"); 62285703Smarkj 63285703SmarkjSDT_PROBE_DEFINE2(lockstat, , , thread__spin, "struct mtx *", "uint64_t"); 64285703Smarkj 65327409Smjgvolatile int __read_frequently lockstat_enabled; 66192853Ssson 67192853Sssonuint64_t 68285664Smarkjlockstat_nsecs(struct lock_object *lo) 69192853Ssson{ 70192853Ssson struct bintime bt; 71192853Ssson uint64_t ns; 72192853Ssson 73285663Smarkj if (!lockstat_enabled) 74285663Smarkj return (0); 75285664Smarkj if ((lo->lo_flags & LO_NOPROFILE) != 0) 76285664Smarkj return (0); 77285663Smarkj 78192853Ssson binuptime(&bt); 79192853Ssson ns = bt.sec * (uint64_t)1000000000; 80192853Ssson ns += ((uint64_t)1000000000 * (uint32_t)(bt.frac >> 32)) >> 32; 81192853Ssson return (ns); 82192853Ssson} 83