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 33 struct lock_profile_object; 34 LIST_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 42 u_int64_t nanoseconds(void); 43 #endif 44 45 extern volatile int lock_prof_enable; 46 47 void lock_profile_obtain_lock_success(struct lock_object *lo, bool spin, 48 int contested, uint64_t waittime, const char *file, int line); 49 void lock_profile_release_lock(struct lock_object *lo, bool spin); 50 void lock_profile_thread_exit(struct thread *td); 51 52 static inline void 53 lock_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