--- //depot/vendor/freebsd/src/sys/kern/kern_rwlock.c	2007/06/26 21:37:10
+++ //depot/user/attilio/attilio_smpng/kern/kern_rwlock.c	2007/07/11 19:39:25
@@ -45,7 +45,7 @@
 #include <sys/rwlock.h>
 #include <sys/systm.h>
 #include <sys/turnstile.h>
-#include <sys/lock_profile.h>
+
 #include <machine/cpu.h>
 
 CTASSERT((RW_RECURSE & LO_CLASSFLAGS) == RW_RECURSE);
@@ -221,8 +221,10 @@
 #ifdef ADAPTIVE_RWLOCKS
 	volatile struct thread *owner;
 #endif
+#ifdef LOCK_PROFILING_SHARED
 	uint64_t waittime = 0;
 	int contested = 0;
+#endif
 	uintptr_t x;
 
 	KASSERT(rw->rw_lock != RW_DESTROYED,
@@ -265,22 +267,22 @@
 			MPASS((x & RW_LOCK_READ_WAITERS) == 0);
 			if (atomic_cmpset_acq_ptr(&rw->rw_lock, x,
 			    x + RW_ONE_READER)) {
+#ifdef LOCK_PROFILING_SHARED
+				if (RW_READERS(x) == 0)
+					lock_profile_obtain_lock_success(
+					    &rw->lock_object, contested,
+					    waittime, file, line);
+#endif
 				if (LOCK_LOG_TEST(&rw->lock_object, 0))
 					CTR4(KTR_LOCK,
 					    "%s: %p succeed %p -> %p", __func__,
 					    rw, (void *)x,
 					    (void *)(x + RW_ONE_READER));
-				if (RW_READERS(x) == 0)
-					lock_profile_obtain_lock_success(
-					    &rw->lock_object, contested, waittime,
-					    file, line);
 				break;
 			}
 			cpu_spinwait();
 			continue;
 		}
-		lock_profile_obtain_lock_failed(&rw->lock_object, &contested,
-		    &waittime);
 
 		/*
 		 * Okay, now it's the hard case.  Some other thread already
@@ -331,6 +333,10 @@
 			if (LOCK_LOG_TEST(&rw->lock_object, 0))
 				CTR3(KTR_LOCK, "%s: spinning on %p held by %p",
 				    __func__, rw, owner);
+#ifdef LOCK_PROFILING_SHARED
+			lock_profile_obtain_lock_failed(&rw->lock_object,
+			    &contested, &waittime);
+#endif
 			while ((struct thread*)RW_OWNER(rw->rw_lock)== owner &&
 			    TD_IS_RUNNING(owner))
 				cpu_spinwait();
@@ -345,6 +351,10 @@
 		if (LOCK_LOG_TEST(&rw->lock_object, 0))
 			CTR2(KTR_LOCK, "%s: %p blocking on turnstile", __func__,
 			    rw);
+#ifdef LOCK_PROFILING_SHARED
+		lock_profile_obtain_lock_failed(&rw->lock_object, &contested,
+		    &waittime);
+#endif
 		turnstile_wait(ts, rw_owner(rw), TS_SHARED_QUEUE);
 		if (LOCK_LOG_TEST(&rw->lock_object, 0))
 			CTR2(KTR_LOCK, "%s: %p resuming from turnstile",
@@ -403,6 +413,9 @@
 		 */
 		KASSERT(!(x & RW_LOCK_READ_WAITERS),
 		    ("%s: waiting readers", __func__));
+#ifdef LOCK_PROFILING_SHARED
+		lock_profile_release_lock(&rw->lock_object);
+#endif
 
 		/*
 		 * If there aren't any waiters for a write lock, then try
@@ -479,7 +492,6 @@
 		turnstile_chain_unlock(&rw->lock_object);
 		break;
 	}
-	lock_profile_release_lock(&rw->lock_object);
 }
 
 /*
@@ -494,7 +506,9 @@
 #ifdef ADAPTIVE_RWLOCKS
 	volatile struct thread *owner;
 #endif
+	uint64_t waittime = 0;
 	uintptr_t v;
+	int contested = 0;
 
 	if (rw_wlocked(rw)) {
 		KASSERT(rw->lock_object.lo_flags & RW_RECURSE,
@@ -578,6 +592,8 @@
 			if (LOCK_LOG_TEST(&rw->lock_object, 0))
 				CTR3(KTR_LOCK, "%s: spinning on %p held by %p",
 				    __func__, rw, owner);
+			lock_profile_obtain_lock_failed(&rw->lock_object,
+			    &contested, &waittime);
 			while ((struct thread*)RW_OWNER(rw->rw_lock)== owner &&
 			    TD_IS_RUNNING(owner))
 				cpu_spinwait();
@@ -592,11 +608,15 @@
 		if (LOCK_LOG_TEST(&rw->lock_object, 0))
 			CTR2(KTR_LOCK, "%s: %p blocking on turnstile", __func__,
 			    rw);
+		lock_profile_obtain_lock_failed(&rw->lock_object, &contested,
+		    &waittime);
 		turnstile_wait(ts, rw_owner(rw), TS_EXCLUSIVE_QUEUE);
 		if (LOCK_LOG_TEST(&rw->lock_object, 0))
 			CTR2(KTR_LOCK, "%s: %p resuming from turnstile",
 			    __func__, rw);
 	}
+	lock_profile_obtain_lock_success(&rw->lock_object, contested, waittime,
+	    file, line);
 }
 
 /*
--- //depot/vendor/freebsd/src/sys/sys/rwlock.h	2007/06/26 21:32:01
+++ //depot/user/attilio/attilio_smpng/sys/rwlock.h	2007/07/11 19:28:20
@@ -34,6 +34,7 @@
 
 #include <sys/_lock.h>
 #include <sys/_rwlock.h>
+#include <sys/lock_profile.h>
 
 #ifdef _KERNEL
 #include <sys/pcpu.h>
@@ -98,18 +99,14 @@
  */
 
 /* Acquire a write lock. */
-#define	__rw_wlock(rw, tid, file, line) do {	\
+#define	__rw_wlock(rw, tid, file, line) do {				\
 	uintptr_t _tid = (uintptr_t)(tid);				\
-	int contested = 0;                                              \
-        uint64_t waitstart = 0;                                         \
 						                        \
-	if (!_rw_write_lock((rw), _tid)) {				\
-		lock_profile_obtain_lock_failed(&(rw)->lock_object,	\
-		    &contested, &waitstart);				\
+	if (!_rw_write_lock((rw), _tid))				\
 		_rw_wlock_hard((rw), _tid, (file), (line));		\
-	}                                                               \
-	lock_profile_obtain_lock_success(&(rw)->lock_object, contested,	\
-	    waitstart, (file), (line));					\
+	else								\
+		lock_profile_obtain_lock_success(&(rw)->lock_object, 0,	\
+		    0, file, line);					\
 } while (0)
 
 /* Release a write lock. */