1/*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2006 Kip Macy kmacy@FreeBSD.org 5 * Copyright (c) 2006 Kris Kennaway kris@FreeBSD.org 6 * Copyright (c) 2006 Dag-Erling Smorgrav des@des.no 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 19 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHAL THE AUTHORS BE LIABLE FOR ANY 21 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30#ifndef _SYS_LOCK_PROFILE_H_ 31#define _SYS_LOCK_PROFILE_H_ 32 33struct lock_profile_object; 34LIST_HEAD(lpohead, lock_profile_object); 35 36#ifdef _KERNEL 37#ifdef LOCK_PROFILING 38#include <machine/cpufunc.h> 39#include <sys/lock.h> 40 41#ifndef USE_CPU_NANOSECONDS 42u_int64_t nanoseconds(void); 43#endif 44 45extern volatile int lock_prof_enable; 46 47void lock_profile_obtain_lock_success(struct lock_object *lo, bool spin, 48 int contested, uint64_t waittime, const char *file, int line); 49void lock_profile_release_lock(struct lock_object *lo, bool spin); 50void lock_profile_thread_exit(struct thread *td); 51 52static inline void 53lock_profile_obtain_lock_failed(struct lock_object *lo, bool spin, 54 int *contested, uint64_t *waittime) 55{ 56 if (!lock_prof_enable || (lo->lo_flags & LO_NOPROFILE) || *contested) 57 return; 58 *waittime = nanoseconds(); 59 *contested = 1; 60} 61 62#else /* !LOCK_PROFILING */ 63 64#define lock_profile_release_lock(lo, spin) (void)0 65#define lock_profile_obtain_lock_failed(lo, spin, contested, waittime) (void)0 66#define lock_profile_obtain_lock_success(lo, spin, contested, waittime, file, line) (void)0 67#define lock_profile_thread_exit(td) (void)0 68 69#endif /* !LOCK_PROFILING */ 70 71#endif /* _KERNEL */ 72 73#endif /* _SYS_LOCK_PROFILE_H_ */ 74