MDEV-24973 Performance schema duplicates rarely executed code for mutex operations

The PERFORMANCE_SCHEMA wrapper for mutex and rw-lock operations is
causing a lot of unlikely code to be inlined in each invocation.
The impact of this may have been emphasized in MariaDB 10.6, because
InnoDB now uses the common implementation of mutexes and condition
variables (MDEV-21452).

By default, we build with cmake -DPLUGIN_PERFSCHEMA enabled,
but at runtime no instrumentation will be enabled. Similar to
commit eba2d10ac53d1d2f975027ba2b2ca39d9c9b98ad
we had better avoid inlining the rarely executed code in order to reduce
the code size and to improve the efficiency of the instruction cache.

This change was extensively tested by Axel Schwenke with and without
--enable-performance-schema (with no individual instruments enabled).
Removing the inline functions did not cause any performance regression
in either case. There seemed to be a tiny improvement, possibly due
to reduced code size and better instruction cache hit rate.

1 files changed, 55 insertions, 239 deletions

diff --git a/include/mysql/psi/mysql_thread.h b/include/mysql/psi/mysql_thread.h
index 47f89f76685..87f36d92573 100644
--- a/include/mysql/psi/mysql_thread.h
+++ b/include/mysql/psi/mysql_thread.h
@@ -1,5 +1,5 @@
 /* Copyright (c) 2008, 2013, Oracle and/or its affiliates.
-  Copyright (c) 2020, MariaDB Corporation.
+  Copyright (c) 2020, 2021, MariaDB Corporation.
 
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License, version 2.0,
@@ -727,6 +727,13 @@ static inline int inline_mysql_mutex_destroy(
 #endif
 }
 
+#ifdef HAVE_PSI_MUTEX_INTERFACE
+ATTRIBUTE_COLD int psi_mutex_lock(mysql_mutex_t *that,
+                                  const char *file, uint line);
+ATTRIBUTE_COLD int psi_mutex_trylock(mysql_mutex_t *that,
+                                     const char *file, uint line);
+#endif
+
 static inline int inline_mysql_mutex_lock(
   mysql_mutex_t *that
 #if defined(SAFE_MUTEX) || defined (HAVE_PSI_MUTEX_INTERFACE)
@@ -734,40 +741,16 @@ static inline int inline_mysql_mutex_lock(
 #endif
   )
 {
-  int result;
-
 #ifdef HAVE_PSI_MUTEX_INTERFACE
   if (psi_likely(that->m_psi != NULL))
-  {
-    /* Instrumentation start */
-    PSI_mutex_locker *locker;
-    PSI_mutex_locker_state state;
-    locker= PSI_MUTEX_CALL(start_mutex_wait)(&state, that->m_psi,
-                                       PSI_MUTEX_LOCK, src_file, src_line);
-
-    /* Instrumented code */
-#ifdef SAFE_MUTEX
-    result= safe_mutex_lock(&that->m_mutex, FALSE, src_file, src_line);
-#else
-    result= pthread_mutex_lock(&that->m_mutex);
-#endif
-
-    /* Instrumentation end */
-    if (locker != NULL)
-      PSI_MUTEX_CALL(end_mutex_wait)(locker, result);
-
-    return result;
-  }
+    return psi_mutex_lock(that, src_file, src_line);
 #endif
-
   /* Non instrumented code */
 #ifdef SAFE_MUTEX
-  result= safe_mutex_lock(&that->m_mutex, FALSE, src_file, src_line);
+  return safe_mutex_lock(&that->m_mutex, FALSE, src_file, src_line);
 #else
-  result= pthread_mutex_lock(&that->m_mutex);
+  return pthread_mutex_lock(&that->m_mutex);
 #endif
-
-  return result;
 }
 
 static inline int inline_mysql_mutex_trylock(
@@ -777,40 +760,16 @@ static inline int inline_mysql_mutex_trylock(
 #endif
   )
 {
-  int result;
-
 #ifdef HAVE_PSI_MUTEX_INTERFACE
   if (psi_likely(that->m_psi != NULL))
-  {
-    /* Instrumentation start */
-    PSI_mutex_locker *locker;
-    PSI_mutex_locker_state state;
-    locker= PSI_MUTEX_CALL(start_mutex_wait)(&state, that->m_psi,
-                                       PSI_MUTEX_TRYLOCK, src_file, src_line);
-
-    /* Instrumented code */
-#ifdef SAFE_MUTEX
-    result= safe_mutex_lock(&that->m_mutex, TRUE, src_file, src_line);
-#else
-    result= pthread_mutex_trylock(&that->m_mutex);
+    return psi_mutex_trylock(that, src_file, src_line);
 #endif
-
-    /* Instrumentation end */
-    if (locker != NULL)
-      PSI_MUTEX_CALL(end_mutex_wait)(locker, result);
-
-    return result;
-  }
-#endif
-
   /* Non instrumented code */
 #ifdef SAFE_MUTEX
-  result= safe_mutex_lock(&that->m_mutex, TRUE, src_file, src_line);
+  return safe_mutex_lock(&that->m_mutex, TRUE, src_file, src_line);
 #else
-  result= pthread_mutex_trylock(&that->m_mutex);
+  return pthread_mutex_trylock(&that->m_mutex);
 #endif
-
-  return result;
 }
 
 static inline int inline_mysql_mutex_unlock(
@@ -914,6 +873,23 @@ static inline int inline_mysql_prlock_destroy(
 }
 #endif
 
+#ifdef HAVE_PSI_RWLOCK_INTERFACE
+ATTRIBUTE_COLD
+int psi_rwlock_rdlock(mysql_rwlock_t *that, const char *file, uint line);
+ATTRIBUTE_COLD
+int psi_rwlock_tryrdlock(mysql_rwlock_t *that, const char *file, uint line);
+ATTRIBUTE_COLD
+int psi_rwlock_wrlock(mysql_rwlock_t *that, const char *file, uint line);
+ATTRIBUTE_COLD
+int psi_rwlock_trywrlock(mysql_rwlock_t *that, const char *file, uint line);
+# ifndef DISABLE_MYSQL_PRLOCK_H
+ATTRIBUTE_COLD
+int psi_prlock_rdlock(mysql_prlock_t *that, const char *file, uint line);
+ATTRIBUTE_COLD
+int psi_prlock_wrlock(mysql_prlock_t *that, const char *file, uint line);
+# endif
+#endif
+
 static inline int inline_mysql_rwlock_rdlock(
   mysql_rwlock_t *that
 #ifdef HAVE_PSI_RWLOCK_INTERFACE
@@ -921,32 +897,11 @@ static inline int inline_mysql_rwlock_rdlock(
 #endif
   )
 {
-  int result;
-
 #ifdef HAVE_PSI_RWLOCK_INTERFACE
   if (psi_likely(that->m_psi != NULL))
-  {
-    /* Instrumentation start */
-    PSI_rwlock_locker *locker;
-    PSI_rwlock_locker_state state;
-    locker= PSI_RWLOCK_CALL(start_rwlock_rdwait)(&state, that->m_psi,
-                                          PSI_RWLOCK_READLOCK, src_file, src_line);
-
-    /* Instrumented code */
-    result= rw_rdlock(&that->m_rwlock);
-
-    /* Instrumentation end */
-    if (locker != NULL)
-      PSI_RWLOCK_CALL(end_rwlock_rdwait)(locker, result);
-
-    return result;
-  }
+    return psi_rwlock_rdlock(that, src_file, src_line);
 #endif
-
-  /* Non instrumented code */
-  result= rw_rdlock(&that->m_rwlock);
-
-  return result;
+  return rw_rdlock(&that->m_rwlock);
 }
 
 #ifndef DISABLE_MYSQL_PRLOCK_H
@@ -957,32 +912,11 @@ static inline int inline_mysql_prlock_rdlock(
 #endif
   )
 {
-  int result;
-
 #ifdef HAVE_PSI_RWLOCK_INTERFACE
   if (psi_likely(that->m_psi != NULL))
-  {
-    /* Instrumentation start */
-    PSI_rwlock_locker *locker;
-    PSI_rwlock_locker_state state;
-    locker= PSI_RWLOCK_CALL(start_rwlock_rdwait)(&state, that->m_psi,
-                                          PSI_RWLOCK_READLOCK, src_file, src_line);
-
-    /* Instrumented code */
-    result= rw_pr_rdlock(&that->m_prlock);
-
-    /* Instrumentation end */
-    if (locker != NULL)
-      PSI_RWLOCK_CALL(end_rwlock_rdwait)(locker, result);
-
-    return result;
-  }
+    return psi_prlock_rdlock(that, src_file, src_line);
 #endif
-
-  /* Non instrumented code */
-  result= rw_pr_rdlock(&that->m_prlock);
-
-  return result;
+  return rw_pr_rdlock(&that->m_prlock);
 }
 #endif
 
@@ -993,32 +927,11 @@ static inline int inline_mysql_rwlock_wrlock(
 #endif
   )
 {
-  int result;
-
 #ifdef HAVE_PSI_RWLOCK_INTERFACE
   if (psi_likely(that->m_psi != NULL))
-  {
-    /* Instrumentation start */
-    PSI_rwlock_locker *locker;
-    PSI_rwlock_locker_state state;
-    locker= PSI_RWLOCK_CALL(start_rwlock_wrwait)(&state, that->m_psi,
-                                          PSI_RWLOCK_WRITELOCK, src_file, src_line);
-
-    /* Instrumented code */
-    result= rw_wrlock(&that->m_rwlock);
-
-    /* Instrumentation end */
-    if (locker != NULL)
-      PSI_RWLOCK_CALL(end_rwlock_wrwait)(locker, result);
-
-    return result;
-  }
+    return psi_rwlock_wrlock(that, src_file, src_line);
 #endif
-
-  /* Non instrumented code */
-  result= rw_wrlock(&that->m_rwlock);
-
-  return result;
+  return rw_wrlock(&that->m_rwlock);
 }
 
 #ifndef DISABLE_MYSQL_PRLOCK_H
@@ -1029,32 +942,11 @@ static inline int inline_mysql_prlock_wrlock(
 #endif
   )
 {
-  int result;
-
 #ifdef HAVE_PSI_RWLOCK_INTERFACE
   if (psi_likely(that->m_psi != NULL))
-  {
-    /* Instrumentation start */
-    PSI_rwlock_locker *locker;
-    PSI_rwlock_locker_state state;
-    locker= PSI_RWLOCK_CALL(start_rwlock_wrwait)(&state, that->m_psi,
-                                          PSI_RWLOCK_WRITELOCK, src_file, src_line);
-
-    /* Instrumented code */
-    result= rw_pr_wrlock(&that->m_prlock);
-
-    /* Instrumentation end */
-    if (locker != NULL)
-      PSI_RWLOCK_CALL(end_rwlock_wrwait)(locker, result);
-
-    return result;
-  }
+    return psi_prlock_wrlock(that, src_file, src_line);
 #endif
-
-  /* Non instrumented code */
-  result= rw_pr_wrlock(&that->m_prlock);
-
-  return result;
+  return rw_pr_wrlock(&that->m_prlock);
 }
 #endif
 
@@ -1065,32 +957,11 @@ static inline int inline_mysql_rwlock_tryrdlock(
 #endif
   )
 {
-  int result;
-
 #ifdef HAVE_PSI_RWLOCK_INTERFACE
   if (psi_likely(that->m_psi != NULL))
-  {
-    /* Instrumentation start */
-    PSI_rwlock_locker *locker;
-    PSI_rwlock_locker_state state;
-    locker= PSI_RWLOCK_CALL(start_rwlock_rdwait)(&state, that->m_psi,
-                                          PSI_RWLOCK_TRYREADLOCK, src_file, src_line);
-
-    /* Instrumented code */
-    result= rw_tryrdlock(&that->m_rwlock);
-
-    /* Instrumentation end */
-    if (locker != NULL)
-      PSI_RWLOCK_CALL(end_rwlock_rdwait)(locker, result);
-
-    return result;
-  }
+    return psi_rwlock_tryrdlock(that, src_file, src_line);
 #endif
-
-  /* Non instrumented code */
-  result= rw_tryrdlock(&that->m_rwlock);
-
-  return result;
+  return rw_tryrdlock(&that->m_rwlock);
 }
 
 static inline int inline_mysql_rwlock_trywrlock(
@@ -1100,32 +971,11 @@ static inline int inline_mysql_rwlock_trywrlock(
 #endif
   )
 {
-  int result;
-
 #ifdef HAVE_PSI_RWLOCK_INTERFACE
   if (psi_likely(that->m_psi != NULL))
-  {
-    /* Instrumentation start */
-    PSI_rwlock_locker *locker;
-    PSI_rwlock_locker_state state;
-    locker= PSI_RWLOCK_CALL(start_rwlock_wrwait)(&state, that->m_psi,
-                                          PSI_RWLOCK_TRYWRITELOCK, src_file, src_line);
-
-    /* Instrumented code */
-    result= rw_trywrlock(&that->m_rwlock);
-
-    /* Instrumentation end */
-    if (locker != NULL)
-      PSI_RWLOCK_CALL(end_rwlock_wrwait)(locker, result);
-
-    return result;
-  }
+    return psi_rwlock_trywrlock(that, src_file, src_line);
 #endif
-
-  /* Non instrumented code */
-  result= rw_trywrlock(&that->m_rwlock);
-
-  return result;
+  return rw_trywrlock(&that->m_rwlock);
 }
 
 static inline int inline_mysql_rwlock_unlock(
@@ -1199,6 +1049,14 @@ static inline int inline_mysql_cond_destroy(
   return pthread_cond_destroy(&that->m_cond);
 }
 
+#ifdef HAVE_PSI_COND_INTERFACE
+ATTRIBUTE_COLD int psi_cond_wait(mysql_cond_t *that, mysql_mutex_t *mutex,
+                                 const char *file, uint line);
+ATTRIBUTE_COLD int psi_cond_timedwait(mysql_cond_t *that, mysql_mutex_t *mutex,
+                                      const struct timespec *abstime,
+                                      const char *file, uint line);
+#endif
+
 static inline int inline_mysql_cond_wait(
   mysql_cond_t *that,
   mysql_mutex_t *mutex
@@ -1207,32 +1065,11 @@ static inline int inline_mysql_cond_wait(
 #endif
   )
 {
-  int result;
-
 #ifdef HAVE_PSI_COND_INTERFACE
   if (psi_likely(that->m_psi != NULL))
-  {
-    /* Instrumentation start */
-    PSI_cond_locker *locker;
-    PSI_cond_locker_state state;
-    locker= PSI_COND_CALL(start_cond_wait)(&state, that->m_psi, mutex->m_psi,
-                                      PSI_COND_WAIT, src_file, src_line);
-
-    /* Instrumented code */
-    result= my_cond_wait(&that->m_cond, &mutex->m_mutex);
-
-    /* Instrumentation end */
-    if (locker != NULL)
-      PSI_COND_CALL(end_cond_wait)(locker, result);
-
-    return result;
-  }
+    return psi_cond_wait(that, mutex, src_file, src_line);
 #endif
-
-  /* Non instrumented code */
-  result= my_cond_wait(&that->m_cond, &mutex->m_mutex);
-
-  return result;
+  return my_cond_wait(&that->m_cond, &mutex->m_mutex);
 }
 
 static inline int inline_mysql_cond_timedwait(
@@ -1244,32 +1081,11 @@ static inline int inline_mysql_cond_timedwait(
 #endif
   )
 {
-  int result;
-
 #ifdef HAVE_PSI_COND_INTERFACE
   if (psi_likely(that->m_psi != NULL))
-  {
-    /* Instrumentation start */
-    PSI_cond_locker *locker;
-    PSI_cond_locker_state state;
-    locker= PSI_COND_CALL(start_cond_wait)(&state, that->m_psi, mutex->m_psi,
-                                      PSI_COND_TIMEDWAIT, src_file, src_line);
-
-    /* Instrumented code */
-    result= my_cond_timedwait(&that->m_cond, &mutex->m_mutex, abstime);
-
-    /* Instrumentation end */
-    if (psi_likely(locker != NULL))
-      PSI_COND_CALL(end_cond_wait)(locker, result);
-
-    return result;
-  }
+    return psi_cond_timedwait(that, mutex, abstime, src_file, src_line);
 #endif
-
-  /* Non instrumented code */
-  result= my_cond_timedwait(&that->m_cond, &mutex->m_mutex, abstime);
-
-  return result;
+  return my_cond_timedwait(&that->m_cond, &mutex->m_mutex, abstime);
 }
 
 static inline int inline_mysql_cond_signal(