real sync with patches rev12

buf/buf0buf.c

@@ -3595,13 +3595,15 @@ buf_print_io(
 	buf_pool_mutex_enter();
 
 	fprintf(file,
-		"Buffer pool size   %lu\n"
-		"Free buffers       %lu\n"
-		"Database pages     %lu\n"
-		"Modified db pages  %lu\n"
+		"Buffer pool size        %lu\n"
+		"Buffer pool size, bytes %lu\n"
+		"Free buffers            %lu\n"
+		"Database pages          %lu\n"
+		"Modified db pages       %lu\n"
 		"Pending reads %lu\n"
 		"Pending writes: LRU %lu, flush list %lu, single page %lu\n",
 		(ulong) size,
+		(ulong) size * UNIV_PAGE_SIZE,
 		(ulong) UT_LIST_GET_LEN(buf_pool->free),
 		(ulong) UT_LIST_GET_LEN(buf_pool->LRU),
 		(ulong) UT_LIST_GET_LEN(buf_pool->flush_list),

buf/buf0rea.c

@@ -187,6 +187,10 @@ buf_read_ahead_random(
 	ulint		i;
 	ulint		buf_read_ahead_random_area;
 
+	if (!(srv_read_ahead & 1)) {
+		return(0);
+	}
+
 	if (srv_startup_is_before_trx_rollback_phase) {
 		/* No read-ahead to avoid thread deadlocks */
 		return(0);
@@ -412,6 +416,10 @@ buf_read_ahead_linear(
 	const ulint	buf_read_ahead_linear_area
 		= BUF_READ_AHEAD_LINEAR_AREA;
 
+ 	if (!(srv_read_ahead & 2)) {
+ 		return(0);
+ 	}
+ 
 	if (UNIV_UNLIKELY(srv_startup_is_before_trx_rollback_phase)) {
 		/* No read-ahead to avoid thread deadlocks */
 		return(0);

fil/fil0fil.c

@@ -4816,3 +4816,30 @@ fil_page_get_type(
 
 	return(mach_read_from_2(page + FIL_PAGE_TYPE));
 }
+
+/*************************************************************************
+Return local hash table informations. */
+
+ulint
+fil_system_hash_cells(void)
+/*=======================*/
+{
+       if (fil_system) {
+               return (fil_system->spaces->n_cells
+                       + fil_system->name_hash->n_cells);
+       } else {
+               return 0;
+       }
+}
+
+ulint
+fil_system_hash_nodes(void)
+/*=======================*/
+{
+       if (fil_system) {
+               return (UT_LIST_GET_LEN(fil_system->space_list)
+                       * (sizeof(fil_space_t) + MEM_BLOCK_HEADER_SIZE));
+       } else {
+               return 0;
+       }
+}

handler/ha_innodb.cc

@@ -137,6 +137,7 @@ static long innobase_mirrored_log_groups, innobase_log_files_in_group,
 	innobase_force_recovery, innobase_open_files,
 	innobase_autoinc_lock_mode;
 
+static unsigned long innobase_read_io_threads, innobase_write_io_threads;
 static long long innobase_buffer_pool_size, innobase_log_file_size;
 
 /* The default values for the following char* start-up parameters
@@ -2066,6 +2067,8 @@ innobase_init(
 	srv_mem_pool_size = (ulint) innobase_additional_mem_pool_size;
 
 	srv_n_file_io_threads = (ulint) innobase_file_io_threads;
+	srv_n_read_io_threads = (ulint) innobase_read_io_threads;
+	srv_n_write_io_threads = (ulint) innobase_write_io_threads;
 
 	srv_force_recovery = (ulint) innobase_force_recovery;
 
@@ -9406,6 +9409,16 @@ static MYSQL_SYSVAR_BOOL(locks_unsafe_for_binlog, innobase_locks_unsafe_for_binl
   "Force InnoDB to not use next-key locking, to use only row-level locking.",
   NULL, NULL, FALSE);
 
+static MYSQL_SYSVAR_ULONG(show_verbose_locks, srv_show_verbose_locks,
+  PLUGIN_VAR_OPCMDARG,
+  "Whether to show records locked in SHOW INNODB STATUS.",
+  NULL, NULL, 0, 0, 1, 0);
+
+static MYSQL_SYSVAR_ULONG(show_locks_held, srv_show_locks_held,
+  PLUGIN_VAR_RQCMDARG,
+  "Number of locks held to print for each InnoDB transaction in SHOW INNODB STATUS.",
+  NULL, NULL, 10, 0, 1000, 0);
+
 #ifdef UNIV_LOG_ARCHIVE
 static MYSQL_SYSVAR_STR(log_arch_dir, innobase_log_arch_dir,
   PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY,
@@ -9556,7 +9569,32 @@ static MYSQL_SYSVAR_LONG(autoinc_lock_mode, innobase_autoinc_lock_mode,
 
 static MYSQL_SYSVAR_STR(version, innodb_version_str,
   PLUGIN_VAR_NOCMDOPT | PLUGIN_VAR_READONLY,
-  "InnoDB version", NULL, NULL, INNODB_VERSION_STR);
+  "Percona-InnoDB-plugin version", NULL, NULL, INNODB_VERSION_STR);
+
+static MYSQL_SYSVAR_ULONG(io_capacity, srv_io_capacity,
+  PLUGIN_VAR_RQCMDARG,
+  "Number of IO operations per second the server can do. Tunes background IO rate.",
+  NULL, NULL, 100, 100, 999999999, 0);
+
+static MYSQL_SYSVAR_ULONG(read_ahead, srv_read_ahead,
+  PLUGIN_VAR_RQCMDARG,
+  "Enable/Diasable read aheads bit0:random bit1:linear",
+  NULL, NULL, 3, 0, 3, 0);
+
+static MYSQL_SYSVAR_ULONG(adaptive_checkpoint, srv_adaptive_checkpoint,
+  PLUGIN_VAR_RQCMDARG,
+  "Enable/Disable flushing along modified age 0:disable 1:enable",
+  NULL, NULL, 0, 0, 1, 0);
+
+static MYSQL_SYSVAR_ULONG(read_io_threads, innobase_read_io_threads,
+  PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY,
+  "Number of background read I/O threads in InnoDB.",
+  NULL, NULL, 1, 1, 64, 0);
+
+static MYSQL_SYSVAR_ULONG(write_io_threads, innobase_write_io_threads,
+  PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY,
+  "Number of background write I/O threads in InnoDB.",
+  NULL, NULL, 1, 1, 64, 0);
 
 static struct st_mysql_sys_var* innobase_system_variables[]= {
   MYSQL_SYSVAR(additional_mem_pool_size),
@@ -9603,7 +9641,14 @@ static struct st_mysql_sys_var* innobase_system_variables[]= {
   MYSQL_SYSVAR(thread_concurrency),
   MYSQL_SYSVAR(thread_sleep_delay),
   MYSQL_SYSVAR(autoinc_lock_mode),
+  MYSQL_SYSVAR(show_verbose_locks),
+  MYSQL_SYSVAR(show_locks_held),
   MYSQL_SYSVAR(version),
+  MYSQL_SYSVAR(io_capacity),
+  MYSQL_SYSVAR(read_ahead),
+  MYSQL_SYSVAR(adaptive_checkpoint),
+  MYSQL_SYSVAR(read_io_threads),
+  MYSQL_SYSVAR(write_io_threads),
   NULL
 };
 

handler/innodb_patch_info.h

@@ -24,5 +24,8 @@ struct innodb_enhancement {
        const char *link;
 }innodb_enhancements[] = {
 {"innodb_show_enhancements","I_S.PERCONA_INNODB_ENHANCEMENTS","","http://www.percona.com/docs/wiki/percona-innodb-plugin:innodb_show_enhancements"},
-{NULL, NULL, NULL, NULL, NULL, NULL}
+{"innodb_show_status","Improvements to SHOW INNODB STATUS","Memory information and lock info fixes","http://www.percona.com/docs/wiki/percona-innodb-plugin:innodb_show_status"},
+{"innodb_io","Improvements to InnoDB IO","","http://www.percona.com/docs/wiki/percona-innodb-plugin:innodb_io"},
+{"innodb_rw_lock","InnoDB RW-lock fixes","Useful for 8+ cores SMP systems","http://www.percona.com/docs/wiki/percona-innodb-plugin:innodb_rw_lock"},
+{NULL, NULL, NULL, NULL}
 };

include/fil0fil.h

@@ -696,6 +696,16 @@ fil_page_get_type(
 				return value not defined */
 	const byte*	page);	/* in: file page */
 
+/*************************************************************************
+Return local hash table informations. */
+
+ulint
+fil_system_hash_cells(void);
+/*========================*/
+
+ulint
+fil_system_hash_nodes(void);
+/*========================*/
 
 typedef	struct fil_space_struct	fil_space_t;
 

include/os0file.h

@@ -561,8 +561,10 @@ os_aio_init(
 /*========*/
 	ulint	n,		/* in: maximum number of pending aio operations
 				allowed; n must be divisible by n_segments */
-	ulint	n_segments,	/* in: combined number of segments in the four
-				first aio arrays; must be >= 4 */
+//	ulint	n_segments,	/* in: combined number of segments in the four
+//				first aio arrays; must be >= 4 */
+	ulint	n_read_threads,  /* n_segments == 2 + n_read_threads + n_write_threads */
+	ulint	n_write_threads, /**/
 	ulint	n_slots_sync);	/* in: number of slots in the sync aio array */
 /***********************************************************************
 Requests an asynchronous i/o operation. */

include/srv0srv.h

@@ -90,6 +90,9 @@ extern ulint	srv_log_file_size;
 extern ulint	srv_log_buffer_size;
 extern ulong	srv_flush_log_at_trx_commit;
 
+extern ulint    srv_show_locks_held;
+extern ulint    srv_show_verbose_locks;
+
 /* The sort order table of the MySQL latin1_swedish_ci character set
 collation */
 extern const byte*	srv_latin1_ordering;
@@ -100,6 +103,8 @@ extern ulint	srv_mem_pool_size;
 extern ulint	srv_lock_table_size;
 
 extern ulint	srv_n_file_io_threads;
+extern ulint	srv_n_read_io_threads;
+extern ulint	srv_n_write_io_threads;
 
 #ifdef UNIV_LOG_ARCHIVE
 extern ibool	srv_log_archive_on;
@@ -144,6 +149,11 @@ extern ulong	srv_max_buf_pool_modified_pct;
 extern ulong	srv_max_purge_lag;
 
 extern ulong	srv_replication_delay;
+
+extern ulint	srv_io_capacity;
+extern ulint	srv_read_ahead;
+extern ulint	srv_adaptive_checkpoint;
+
 /*-------------------------------------------*/
 
 extern ulint	srv_n_rows_inserted;

include/sync0rw.h

@@ -328,7 +328,17 @@ rw_lock_get_x_lock_count(
 Accessor functions for rw lock. */
 UNIV_INLINE
 ulint
-rw_lock_get_waiters(
+rw_lock_get_s_waiters(
+/*==================*/
+	rw_lock_t*	lock);
+UNIV_INLINE
+ulint
+rw_lock_get_x_waiters(
+/*==================*/
+	rw_lock_t*	lock);
+UNIV_INLINE
+ulint
+rw_lock_get_wx_waiters(
 /*================*/
 	rw_lock_t*	lock);
 UNIV_INLINE
@@ -412,6 +422,11 @@ rw_lock_debug_print(
 	rw_lock_debug_t*	info);	/* in: debug struct */
 #endif /* UNIV_SYNC_DEBUG */
 
+#ifdef HAVE_GCC_ATOMIC_BUILTINS
+/* This value means NOT_LOCKED */
+#define RW_LOCK_BIAS		0x00100000
+#endif
+
 /* NOTE! The structure appears here only for the compiler to know its size.
 Do not use its fields directly! The structure used in the spin lock
 implementation of a read-write lock. Several threads may have a shared lock
@@ -421,9 +436,9 @@ blocked by readers, a writer may queue for the lock by setting the writer
 field. Then no new readers are allowed in. */
 
 struct rw_lock_struct {
-	os_event_t	event;	/* Used by sync0arr.c for thread queueing */
-
-#ifdef __WIN__
+			/* Used by sync0arr.c for thread queueing */
+	os_event_t	s_event;	/* Used for s_lock */
+	os_event_t	x_event;	/* Used for x_lock */
 	os_event_t	wait_ex_event;	/* This windows specific event is
 				used by the thread which has set the
 				lock state to RW_LOCK_WAIT_EX. The
@@ -431,30 +446,34 @@ struct rw_lock_struct {
 				thread will be the next one to proceed
 				once the current the event gets
 				signalled. See LEMMA 2 in sync0sync.c */
+
+#ifdef HAVE_GCC_ATOMIC_BUILTINS
+	volatile lint	lock_word;	/* Used by using atomic builtin */
 #endif
 
-	ulint	reader_count;	/* Number of readers who have locked this
+	volatile ulint	reader_count;	/* Number of readers who have locked this
 				lock in the shared mode */
-	ulint	writer;		/* This field is set to RW_LOCK_EX if there
+	volatile ulint	writer;		/* This field is set to RW_LOCK_EX if there
 				is a writer owning the lock (in exclusive
 				mode), RW_LOCK_WAIT_EX if a writer is
 				queueing for the lock, and
 				RW_LOCK_NOT_LOCKED, otherwise. */
-	os_thread_id_t	writer_thread;
+	volatile os_thread_id_t	writer_thread;
 				/* Thread id of a possible writer thread */
-	ulint	writer_count;	/* Number of times the same thread has
+	volatile ulint	writer_count;	/* Number of times the same thread has
 				recursively locked the lock in the exclusive
 				mode */
+#ifndef HAVE_GCC_ATOMIC_BUILTINS
 	mutex_t	mutex;		/* The mutex protecting rw_lock_struct */
+#endif
 	ulint	pass;		/* Default value 0. This is set to some
 				value != 0 given by the caller of an x-lock
 				operation, if the x-lock is to be passed to
 				another thread to unlock (which happens in
 				asynchronous i/o). */
-	ulint	waiters;	/* This ulint is set to 1 if there are
-				waiters (readers or writers) in the global
-				wait array, waiting for this rw_lock.
-				Otherwise, == 0. */
+	volatile ulint	s_waiters;	/* 1: there are waiters (s_lock) */
+	volatile ulint	x_waiters;	/* 1: there are waiters (x_lock) */
+	volatile ulint	wait_ex_waiters;	/* 1: there are waiters (wait_ex) */
 	UT_LIST_NODE_T(rw_lock_t) list;
 				/* All allocated rw locks are put into a
 				list */
@@ -467,7 +486,7 @@ struct rw_lock_struct {
 	const char*	cfile_name;/* File name where lock created */
 	const char*	last_s_file_name;/* File name where last s-locked */
 	const char*	last_x_file_name;/* File name where last x-locked */
-	ibool		writer_is_wait_ex;
+	volatile ibool		writer_is_wait_ex;
 				/* This is TRUE if the writer field is
 				RW_LOCK_WAIT_EX; this field is located far
 				from the memory update hotspot fields which

include/thr0loc.h

@@ -60,6 +60,17 @@ thr_local_get_in_ibuf_field(void);
 /*=============================*/
 			/* out: pointer to the in_ibuf field */
 
+/*************************************************************************
+Return local hash table informations. */
+
+ulint
+thr_local_hash_cells(void);
+/*=======================*/
+
+ulint
+thr_local_hash_nodes(void);
+/*=======================*/
+
 #ifndef UNIV_NONINL
 #include "thr0loc.ic"
 #endif

include/univ.i

@@ -12,6 +12,7 @@ Created 1/20/1994 Heikki Tuuri
 #define INNODB_VERSION_MAJOR	1
 #define INNODB_VERSION_MINOR	0
 #define INNODB_VERSION_BUGFIX	2
+#define PERCONA_INNODB_VERSION	1
 
 /* The following is the InnoDB version as shown in
 SELECT plugin_version FROM information_schema.plugins;
@@ -23,13 +24,14 @@ component, i.e. we show M.N.P as M.N */
 	(INNODB_VERSION_MAJOR << 8 | INNODB_VERSION_MINOR)
 
 /* auxiliary macros to help creating the version as string */
-#define __INNODB_VERSION(a, b, c)	(#a "." #b "." #c)
-#define _INNODB_VERSION(a, b, c)	__INNODB_VERSION(a, b, c)
+#define __INNODB_VERSION(a, b, c, d)	(#a "." #b "." #c "-" #d)
+#define _INNODB_VERSION(a, b, c, d)	__INNODB_VERSION(a, b, c, d)
 
 #define INNODB_VERSION_STR			\
 	_INNODB_VERSION(INNODB_VERSION_MAJOR,	\
 			INNODB_VERSION_MINOR,	\
-			INNODB_VERSION_BUGFIX)
+			INNODB_VERSION_BUGFIX,	\
+			PERCONA_INNODB_VERSION)
 
 #ifdef MYSQL_DYNAMIC_PLUGIN
 /* In the dynamic plugin, redefine some externally visible symbols

lock/lock0lock.c

@@ -4294,32 +4294,32 @@ lock_rec_print(
 
 	putc('\n', file);
 
-	block = buf_page_try_get(space, page_no, &mtr);
-
-	if (block) {
-		for (i = 0; i < lock_rec_get_n_bits(lock); i++) {
-
-			if (lock_rec_get_nth_bit(lock, i)) {
-
-				const rec_t*	rec
-					= page_find_rec_with_heap_no(
-						buf_block_get_frame(block), i);
-				offsets = rec_get_offsets(
-					rec, lock->index, offsets,
-					ULINT_UNDEFINED, &heap);
-
-				fprintf(file, "Record lock, heap no %lu ",
-					(ulong) i);
-				rec_print_new(file, rec, offsets);
-				putc('\n', file);
+	if ( srv_show_verbose_locks ) {
+		block = buf_page_try_get(space, page_no, &mtr);
+		if (block) {
+			for (i = 0; i < lock_rec_get_n_bits(lock); i++) {
+
+				if (lock_rec_get_nth_bit(lock, i)) {
+
+					const rec_t*	rec
+						= page_find_rec_with_heap_no(
+								buf_block_get_frame(block), i);
+					offsets = rec_get_offsets(
+							rec, lock->index, offsets,
+							ULINT_UNDEFINED, &heap);
+
+					fprintf(file, "Record lock, heap no %lu ",
+							(ulong) i);
+					rec_print_new(file, rec, offsets);
+					putc('\n', file);
+				}
+			}
+		} else {
+			for (i = 0; i < lock_rec_get_n_bits(lock); i++) {
+				fprintf(file, "Record lock, heap no %lu\n", (ulong) i);
 			}
-		}
-	} else {
-		for (i = 0; i < lock_rec_get_n_bits(lock); i++) {
-			fprintf(file, "Record lock, heap no %lu\n", (ulong) i);
 		}
 	}
-
 	mtr_commit(&mtr);
 	if (UNIV_LIKELY_NULL(heap)) {
 		mem_heap_free(heap);
@@ -4498,7 +4498,7 @@ loop:
 		}
 	}
 
-	if (!srv_print_innodb_lock_monitor) {
+        if (!srv_print_innodb_lock_monitor && !srv_show_locks_held) {
 		nth_trx++;
 		goto loop;
 	}
@@ -4557,8 +4557,8 @@ loop:
 
 	nth_lock++;
 
-	if (nth_lock >= 10) {
-		fputs("10 LOCKS PRINTED FOR THIS TRX:"
+	if (nth_lock >= srv_show_locks_held) {
+		fputs("TOO LOCKS PRINTED FOR THIS TRX:"
 		      " SUPPRESSING FURTHER PRINTS\n",
 		      file);
 

log/log0log.c

@@ -3258,6 +3258,15 @@ log_print(
 		log_sys->flushed_to_disk_lsn,
 		log_sys->last_checkpoint_lsn);
 
+	fprintf(file,
+		"Max checkpoint age  %lu\n"
+		"Modified age        %lu\n"
+		"Checkpoint age      %lu\n",
+			(ulong) log_sys->max_checkpoint_age,
+			(ulong) (log_sys->lsn -
+					log_buf_pool_get_oldest_modification()),
+			(ulong) (log_sys->lsn - log_sys->last_checkpoint_lsn));
+
 	current_time = time(NULL);
 
 	time_elapsed = 0.001 + difftime(current_time,

os/os0file.c

@@ -2920,8 +2920,10 @@ os_aio_init(
 /*========*/
 	ulint	n,		/* in: maximum number of pending aio operations
 				allowed; n must be divisible by n_segments */
-	ulint	n_segments,	/* in: combined number of segments in the four
-				first aio arrays; must be >= 4 */
+//	ulint	n_segments,	/* in: combined number of segments in the four
+//				first aio arrays; must be >= 4 */
+	ulint	n_read_threads,  /* n_segments == 2 + n_read_threads + n_write_threads*/
+	ulint	n_write_threads, /**/
 	ulint	n_slots_sync)	/* in: number of slots in the sync aio array */
 {
 	ulint	n_read_segs;
@@ -2929,6 +2931,8 @@ os_aio_init(
 	ulint	n_per_seg;
 	ulint	i;
 
+ 	ulint	n_segments = 2 + n_read_threads + n_write_threads;
+ 
 	ut_ad(n % n_segments == 0);
 	ut_ad(n_segments >= 4);
 
@@ -2939,8 +2943,8 @@ os_aio_init(
 	}
 
 	n_per_seg = n / n_segments;
-	n_write_segs = (n_segments - 2) / 2;
-	n_read_segs = n_segments - 2 - n_write_segs;
+	n_write_segs = n_write_threads;
+	n_read_segs = n_read_threads;
 
 	/* fprintf(stderr, "Array n per seg %lu\n", n_per_seg); */
 
@@ -3140,6 +3144,13 @@ os_aio_array_reserve_slot(
 	OVERLAPPED*	control;
 #endif
 	ulint		i;
+	ulint		prim_segment;
+	ulint		n;
+
+	n = array->n_slots / array->n_segments;
+	/* 64 blocks' striping ( aligning max(BUF_READ_AHEAD_AREA) ) */
+	prim_segment = ( offset >> (UNIV_PAGE_SIZE_SHIFT + 6) ) % (array->n_segments);
+
 loop:
 	os_mutex_enter(array->mutex);
 
@@ -3158,6 +3169,16 @@ loop:
 		goto loop;
 	}
 
+	for (i = prim_segment * n; i < array->n_slots; i++) {
+		slot = os_aio_array_get_nth_slot(array, i);
+
+		if (slot->reserved == FALSE) {
+			break;
+		}
+	}
+
+	if (slot->reserved == TRUE){
+		/* Not found after the intended segment. So we should search before. */
 	for (i = 0;; i++) {
 		slot = os_aio_array_get_nth_slot(array, i);
 
@@ -3165,6 +3186,7 @@ loop:
 			break;
 		}
 	}
+	}
 
 	array->n_reserved++;
 

srv/srv0start.c

@@ -1204,24 +1204,28 @@ innobase_start_or_create_for_mysql(void)
 		return(DB_ERROR);
 	}
 
+	/* over write innodb_file_io_threads */
+	srv_n_file_io_threads = 2 + srv_n_read_io_threads + srv_n_write_io_threads;
+
 	/* Restrict the maximum number of file i/o threads */
 	if (srv_n_file_io_threads > SRV_MAX_N_IO_THREADS) {
 
 		srv_n_file_io_threads = SRV_MAX_N_IO_THREADS;
+		srv_n_read_io_threads = srv_n_write_io_threads = (SRV_MAX_N_IO_THREADS - 2) / 2;
 	}
 
 	if (!os_aio_use_native_aio) {
 		/* In simulated aio we currently have use only for 4 threads */
-		srv_n_file_io_threads = 4;
+		/*srv_n_file_io_threads = 4;*/
 
 		os_aio_init(8 * SRV_N_PENDING_IOS_PER_THREAD
 			    * srv_n_file_io_threads,
-			    srv_n_file_io_threads,
-			    SRV_MAX_N_PENDING_SYNC_IOS);
+			    srv_n_read_io_threads, srv_n_write_io_threads,
+			    SRV_MAX_N_PENDING_SYNC_IOS * 8);
 	} else {
 		os_aio_init(SRV_N_PENDING_IOS_PER_THREAD
 			    * srv_n_file_io_threads,
-			    srv_n_file_io_threads,
+			    srv_n_read_io_threads, srv_n_write_io_threads,
 			    SRV_MAX_N_PENDING_SYNC_IOS);
 	}
 

sync/sync0arr.c

@@ -307,13 +307,13 @@ sync_cell_event_reset(
 {
 	if (type == SYNC_MUTEX) {
 		return(os_event_reset(((mutex_t *) object)->event));
-#ifdef __WIN__
 	} else if (type == RW_LOCK_WAIT_EX) {
 		return(os_event_reset(
 		       ((rw_lock_t *) object)->wait_ex_event));
-#endif
-	} else {
-		return(os_event_reset(((rw_lock_t *) object)->event));
+	} else if (type == RW_LOCK_SHARED) {
+		return(os_event_reset(((rw_lock_t *) object)->s_event));
+	} else { /* RW_LOCK_EX */
+		return(os_event_reset(((rw_lock_t *) object)->x_event));
 	}
 }
 
@@ -413,15 +413,12 @@ sync_array_wait_event(
 
 	if (cell->request_type == SYNC_MUTEX) {
 		event = ((mutex_t*) cell->wait_object)->event;
-#ifdef __WIN__
-	/* On windows if the thread about to wait is the one which
-	has set the state of the rw_lock to RW_LOCK_WAIT_EX, then
-	it waits on a special event i.e.: wait_ex_event. */
 	} else if (cell->request_type == RW_LOCK_WAIT_EX) {
 		event = ((rw_lock_t*) cell->wait_object)->wait_ex_event;
-#endif
+	} else if (cell->request_type == RW_LOCK_SHARED) {
+		event = ((rw_lock_t*) cell->wait_object)->s_event;
 	} else {
-		event = ((rw_lock_t*) cell->wait_object)->event;
+		event = ((rw_lock_t*) cell->wait_object)->x_event;
 	}
 
 		cell->waiting = TRUE;
@@ -462,6 +459,7 @@ sync_array_cell_print(
 	mutex_t*	mutex;
 	rw_lock_t*	rwlock;
 	ulint		type;
+	ulint		writer;
 
 	type = cell->request_type;
 
@@ -491,12 +489,10 @@ sync_array_cell_print(
 			(ulong) mutex->waiters);
 
 	} else if (type == RW_LOCK_EX
-#ifdef __WIN__
 		   || type == RW_LOCK_WAIT_EX
-#endif
 		   || type == RW_LOCK_SHARED) {
 
-		fputs(type == RW_LOCK_EX ? "X-lock on" : "S-lock on", file);
+		fputs(type == RW_LOCK_SHARED ? "S-lock on" : "X-lock on", file);
 
 		rwlock = cell->old_wait_rw_lock;
 
@@ -504,22 +500,24 @@ sync_array_cell_print(
 			" RW-latch at %p created in file %s line %lu\n",
 			(void*) rwlock, rwlock->cfile_name,
 			(ulong) rwlock->cline);
-		if (rwlock->writer != RW_LOCK_NOT_LOCKED) {
+		writer = rw_lock_get_writer(rwlock);
+		if (writer != RW_LOCK_NOT_LOCKED) {
 			fprintf(file,
 				"a writer (thread id %lu) has"
 				" reserved it in mode %s",
 				(ulong) os_thread_pf(rwlock->writer_thread),
-				rwlock->writer == RW_LOCK_EX
+				writer == RW_LOCK_EX
 				? " exclusive\n"
 				: " wait exclusive\n");
 		}
 
 		fprintf(file,
-			"number of readers %lu, waiters flag %lu\n"
+			"number of readers %lu, s_waiters flag %lu, x_waiters flag %lu\n"
 			"Last time read locked in file %s line %lu\n"
 			"Last time write locked in file %s line %lu\n",
 			(ulong) rwlock->reader_count,
-			(ulong) rwlock->waiters,
+			(ulong) rwlock->s_waiters,
+			(ulong) (rwlock->x_waiters || rwlock->wait_ex_waiters),
 			rwlock->last_s_file_name,
 			(ulong) rwlock->last_s_line,
 			rwlock->last_x_file_name,
@@ -844,11 +842,15 @@ sync_array_object_signalled(
 /*========================*/
 	sync_array_t*	arr)	/* in: wait array */
 {
+#ifdef HAVE_GCC_ATOMIC_BUILTINS
+	__sync_fetch_and_add(&(arr->sg_count),1);
+#else
 	sync_array_enter(arr);
 
 	arr->sg_count++;
 
 	sync_array_exit(arr);
+#endif
 }
 
 /**************************************************************************
@@ -889,19 +891,23 @@ sync_arr_wake_threads_if_sema_free(void)
 
 					mutex = cell->wait_object;
 					os_event_set(mutex->event);
-#ifdef __WIN__
 				} else if (cell->request_type
 					   == RW_LOCK_WAIT_EX) {
 					rw_lock_t*	lock;
 
 					lock = cell->wait_object;
 					os_event_set(lock->wait_ex_event);
-#endif
-				} else {
+				} else if (cell->request_type
+					   == RW_LOCK_SHARED) {
 					rw_lock_t*	lock;
 
 					lock = cell->wait_object;
-					os_event_set(lock->event);
+					os_event_set(lock->s_event);
+				} else {
+					rw_lock_t*      lock;
+
+					lock = cell->wait_object;
+					os_event_set(lock->x_event);
 				}
 			}
 		}

thr/thr0loc.c

@@ -32,6 +32,7 @@ static mutex_t		thr_local_mutex;
 
 /* The hash table. The module is not yet initialized when it is NULL. */
 static hash_table_t*	thr_local_hash	= NULL;
+ulint		thr_local_hash_n_nodes = 0;
 
 /* The private data for each thread should be put to
 the structure below and the accessor functions written
@@ -177,6 +178,7 @@ thr_local_create(void)
 		    os_thread_pf(os_thread_get_curr_id()),
 		    local);
 
+	thr_local_hash_n_nodes++;
 	mutex_exit(&thr_local_mutex);
 }
 
@@ -204,6 +206,7 @@ thr_local_free(
 
 	HASH_DELETE(thr_local_t, hash, thr_local_hash,
 		    os_thread_pf(id), local);
+	thr_local_hash_n_nodes--;
 
 	mutex_exit(&thr_local_mutex);
 
@@ -226,3 +229,29 @@ thr_local_init(void)
 
 	mutex_create(&thr_local_mutex, SYNC_THR_LOCAL);
 }
+
+/*************************************************************************
+Return local hash table informations. */
+
+ulint
+thr_local_hash_cells(void)
+/*======================*/
+{
+	if (thr_local_hash) {
+		return (thr_local_hash->n_cells);
+	} else {
+		return 0;
+	}
+}
+
+ulint
+thr_local_hash_nodes(void)
+/*======================*/
+{
+	if (thr_local_hash) {
+		return (thr_local_hash_n_nodes
+			* (sizeof(thr_local_t) + MEM_BLOCK_HEADER_SIZE));
+	} else {
+		return 0;
+	}
+}