76 lines
2.7 KiB
C
76 lines
2.7 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2006 Kip Macy kmacy@FreeBSD.org
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* Copyright (c) 2006 Kris Kennaway kris@FreeBSD.org
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* Copyright (c) 2006 Dag-Erling Smorgrav des@des.no
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHAL THE AUTHORS BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _SYS_LOCK_PROFILE_H_
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#define _SYS_LOCK_PROFILE_H_
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struct lock_profile_object;
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LIST_HEAD(lpohead, lock_profile_object);
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#ifdef _KERNEL
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#ifdef LOCK_PROFILING
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#include <machine/cpufunc.h>
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#include <sys/lock.h>
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#ifndef USE_CPU_NANOSECONDS
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u_int64_t nanoseconds(void);
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#endif
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extern volatile int lock_prof_enable;
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void lock_profile_obtain_lock_success(struct lock_object *lo, bool spin,
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int contested, uint64_t waittime, const char *file, int line);
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void lock_profile_release_lock(struct lock_object *lo, bool spin);
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void lock_profile_thread_exit(struct thread *td);
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static inline void
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lock_profile_obtain_lock_failed(struct lock_object *lo, bool spin,
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int *contested, uint64_t *waittime)
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{
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if (!lock_prof_enable || (lo->lo_flags & LO_NOPROFILE) || *contested)
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return;
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*waittime = nanoseconds();
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*contested = 1;
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}
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#else /* !LOCK_PROFILING */
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#define lock_profile_release_lock(lo, spin) (void)0
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#define lock_profile_obtain_lock_failed(lo, spin, contested, waittime) (void)0
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#define lock_profile_obtain_lock_success(lo, spin, contested, waittime, file, line) (void)0
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#define lock_profile_thread_exit(td) (void)0
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#endif /* !LOCK_PROFILING */
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#endif /* _KERNEL */
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#endif /* _SYS_LOCK_PROFILE_H_ */
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