Function lock_profile_obtain_lock_success

freebsd/kern/subr_lock.c:595–637

}

void
lock_profile_obtain_lock_success(struct lock_object *lo, int contested,
    uint64_t waittime, const char *file, int line)
{
	static int lock_prof_count;
	struct lock_profile_object *l;
	int spin;

	if (SCHEDULER_STOPPED())
		return;

	/* don't reset the timer when/if recursing */
	if (!lock_prof_enable || (lo->lo_flags & LO_NOPROFILE))
		return;
	if (lock_prof_skipcount &&
	    (++lock_prof_count % lock_prof_skipcount) != 0)
		return;
	spin = (LOCK_CLASS(lo)->lc_flags & LC_SPINLOCK) ? 1 : 0;
	if (spin && lock_prof_skipspin == 1)
		return;
	critical_enter();
	/* Recheck enabled now that we're in a critical section. */
	if (lock_prof_enable == 0)
		goto out;
	l = lock_profile_object_lookup(lo, spin, file, line);
	if (l == NULL)
		goto out;
	l->lpo_cnt++;
	if (++l->lpo_ref > 1)
		goto out;
	l->lpo_contest_locking = contested;
	l->lpo_acqtime = nanoseconds(); 
	if (waittime && (l->lpo_acqtime > waittime))
		l->lpo_waittime = l->lpo_acqtime - waittime;
	else
		l->lpo_waittime = 0;
out:
	/*
	 * Paired with cpus_fence_seq_cst().
	 */
	atomic_thread_fence_rel();
	critical_exit();
}

void
lock_profile_thread_exit(struct thread *td)