310 lines
11 KiB
C++
310 lines
11 KiB
C++
/*****************************************************************************
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Copyright (c) 1995, 2019, Oracle and/or its affiliates. All Rights Reserved.
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Copyright (c) 2008, Google Inc.
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Portions of this file contain modifications contributed and copyrighted by
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Google, Inc. Those modifications are gratefully acknowledged and are described
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briefly in the InnoDB documentation. The contributions by Google are
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incorporated with their permission, and subject to the conditions contained in
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the file COPYING.Google.
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This program is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License, version 2.0, as published by the
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Free Software Foundation.
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This program is also distributed with certain software (including but not
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limited to OpenSSL) that is licensed under separate terms, as designated in a
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particular file or component or in included license documentation. The authors
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of MySQL hereby grant you an additional permission to link the program and
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your derivative works with the separately licensed software that they have
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included with MySQL.
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This program is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU General Public License, version 2.0,
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for more details.
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You should have received a copy of the GNU General Public License along with
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this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*****************************************************************************/
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/** @file sync/sync0sync.cc
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Mutex, the basic synchronization primitive
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Created 9/5/1995 Heikki Tuuri
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*******************************************************/
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#include "univ.i"
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#include "sync0rw.h"
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#include "sync0sync.h"
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#ifdef HAVE_PSI_INTERFACE
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/** To keep count of number of PS keys defined. */
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unsigned int mysql_pfs_key_t::s_count = 0;
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#endif /* HAVE_PSI_INTERFACE */
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#ifdef UNIV_PFS_MUTEX
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/* Key to register autoinc_mutex with performance schema */
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mysql_pfs_key_t autoinc_mutex_key;
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mysql_pfs_key_t autoinc_persisted_mutex_key;
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#ifndef PFS_SKIP_BUFFER_MUTEX_RWLOCK
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mysql_pfs_key_t buffer_block_mutex_key;
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#endif /* !PFS_SKIP_BUFFER_MUTEX_RWLOCK */
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mysql_pfs_key_t buf_pool_chunks_mutex_key;
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mysql_pfs_key_t buf_pool_flush_state_mutex_key;
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mysql_pfs_key_t buf_pool_LRU_list_mutex_key;
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mysql_pfs_key_t buf_pool_free_list_mutex_key;
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mysql_pfs_key_t buf_pool_zip_free_mutex_key;
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mysql_pfs_key_t buf_pool_zip_hash_mutex_key;
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mysql_pfs_key_t buf_pool_zip_mutex_key;
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mysql_pfs_key_t cache_last_read_mutex_key;
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mysql_pfs_key_t dict_foreign_err_mutex_key;
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mysql_pfs_key_t dict_persist_dirty_tables_mutex_key;
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mysql_pfs_key_t dict_sys_mutex_key;
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mysql_pfs_key_t dict_table_mutex_key;
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mysql_pfs_key_t parser_mutex_key;
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mysql_pfs_key_t fil_system_mutex_key;
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mysql_pfs_key_t flush_list_mutex_key;
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mysql_pfs_key_t fts_bg_threads_mutex_key;
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mysql_pfs_key_t fts_delete_mutex_key;
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mysql_pfs_key_t fts_optimize_mutex_key;
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mysql_pfs_key_t fts_doc_id_mutex_key;
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mysql_pfs_key_t fts_pll_tokenize_mutex_key;
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mysql_pfs_key_t hash_table_mutex_key;
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mysql_pfs_key_t ibuf_bitmap_mutex_key;
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mysql_pfs_key_t ibuf_mutex_key;
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mysql_pfs_key_t ibuf_pessimistic_insert_mutex_key;
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mysql_pfs_key_t lock_free_hash_mutex_key;
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mysql_pfs_key_t log_checkpointer_mutex_key;
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mysql_pfs_key_t log_closer_mutex_key;
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mysql_pfs_key_t log_writer_mutex_key;
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mysql_pfs_key_t log_flusher_mutex_key;
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mysql_pfs_key_t log_write_notifier_mutex_key;
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mysql_pfs_key_t log_flush_notifier_mutex_key;
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mysql_pfs_key_t log_limits_mutex_key;
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mysql_pfs_key_t log_cmdq_mutex_key;
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mysql_pfs_key_t log_sn_lock_key;
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mysql_pfs_key_t log_sys_arch_mutex_key;
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mysql_pfs_key_t page_sys_arch_mutex_key;
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mysql_pfs_key_t page_sys_arch_oper_mutex_key;
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mysql_pfs_key_t page_sys_arch_client_mutex_key;
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mysql_pfs_key_t mutex_list_mutex_key;
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mysql_pfs_key_t recalc_pool_mutex_key;
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mysql_pfs_key_t page_cleaner_mutex_key;
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mysql_pfs_key_t purge_sys_pq_mutex_key;
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mysql_pfs_key_t recv_sys_mutex_key;
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mysql_pfs_key_t recv_writer_mutex_key;
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mysql_pfs_key_t temp_space_rseg_mutex_key;
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mysql_pfs_key_t undo_space_rseg_mutex_key;
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mysql_pfs_key_t txn_undo_space_rseg_mutex_key;
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mysql_pfs_key_t trx_sys_rseg_mutex_key;
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mysql_pfs_key_t page_zip_stat_per_index_mutex_key;
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#ifdef UNIV_DEBUG
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mysql_pfs_key_t rw_lock_debug_mutex_key;
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#endif /* UNIV_DEBUG */
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mysql_pfs_key_t rtr_active_mutex_key;
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mysql_pfs_key_t rtr_match_mutex_key;
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mysql_pfs_key_t rtr_path_mutex_key;
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mysql_pfs_key_t rtr_ssn_mutex_key;
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mysql_pfs_key_t rw_lock_list_mutex_key;
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mysql_pfs_key_t rw_lock_mutex_key;
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mysql_pfs_key_t srv_dict_tmpfile_mutex_key;
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mysql_pfs_key_t srv_innodb_monitor_mutex_key;
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mysql_pfs_key_t srv_misc_tmpfile_mutex_key;
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mysql_pfs_key_t srv_monitor_file_mutex_key;
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#ifdef UNIV_DEBUG
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mysql_pfs_key_t sync_thread_mutex_key;
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#endif /* UNIV_DEBUG */
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mysql_pfs_key_t buf_dblwr_mutex_key;
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mysql_pfs_key_t trx_undo_mutex_key;
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mysql_pfs_key_t trx_mutex_key;
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mysql_pfs_key_t trx_pool_mutex_key;
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mysql_pfs_key_t trx_pool_manager_mutex_key;
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mysql_pfs_key_t temp_pool_manager_mutex_key;
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mysql_pfs_key_t lock_mutex_key;
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mysql_pfs_key_t lock_wait_mutex_key;
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mysql_pfs_key_t trx_sys_mutex_key;
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mysql_pfs_key_t srv_sys_mutex_key;
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mysql_pfs_key_t srv_threads_mutex_key;
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#ifndef PFS_SKIP_EVENT_MUTEX
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mysql_pfs_key_t event_mutex_key;
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mysql_pfs_key_t event_manager_mutex_key;
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#endif /* !PFS_SKIP_EVENT_MUTEX */
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mysql_pfs_key_t sync_array_mutex_key;
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mysql_pfs_key_t zip_pad_mutex_key;
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mysql_pfs_key_t row_drop_list_mutex_key;
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mysql_pfs_key_t file_open_mutex_key;
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mysql_pfs_key_t master_key_id_mutex_key;
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mysql_pfs_key_t clone_sys_mutex_key;
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mysql_pfs_key_t clone_task_mutex_key;
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mysql_pfs_key_t clone_snapshot_mutex_key;
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mysql_pfs_key_t parallel_read_mutex_key;
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#endif /* UNIV_PFS_MUTEX */
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#ifdef UNIV_PFS_RWLOCK
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mysql_pfs_key_t btr_search_latch_key;
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#ifndef PFS_SKIP_BUFFER_MUTEX_RWLOCK
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mysql_pfs_key_t buf_block_lock_key;
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#endif /* !PFS_SKIP_BUFFER_MUTEX_RWLOCK */
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#ifdef UNIV_DEBUG
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mysql_pfs_key_t buf_block_debug_latch_key;
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#endif /* UNIV_DEBUG */
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mysql_pfs_key_t undo_spaces_lock_key;
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mysql_pfs_key_t rsegs_lock_key;
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mysql_pfs_key_t dict_operation_lock_key;
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mysql_pfs_key_t dict_table_stats_key;
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mysql_pfs_key_t hash_table_locks_key;
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mysql_pfs_key_t index_tree_rw_lock_key;
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mysql_pfs_key_t index_online_log_key;
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mysql_pfs_key_t fil_space_latch_key;
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mysql_pfs_key_t fts_cache_rw_lock_key;
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mysql_pfs_key_t fts_cache_init_rw_lock_key;
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mysql_pfs_key_t trx_i_s_cache_lock_key;
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mysql_pfs_key_t trx_purge_latch_key;
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#endif /* UNIV_PFS_RWLOCK */
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/* There are mutexes/rwlocks that we want to exclude from instrumentation
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even if their corresponding performance schema define is set. And this
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PFS_NOT_INSTRUMENTED is used as the key value to identify those objects that
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would be excluded from instrumentation.*/
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mysql_pfs_key_t PFS_NOT_INSTRUMENTED(0);
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/** For monitoring active mutexes */
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MutexMonitor *mutex_monitor;
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/**
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Prints wait info of the sync system.
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@param file - where to print */
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static void sync_print_wait_info(FILE *file) {
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fprintf(file,
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"RW-shared spins " UINT64PF ", rounds " UINT64PF
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","
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" OS waits " UINT64PF
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"\n"
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"RW-excl spins " UINT64PF ", rounds " UINT64PF
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","
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" OS waits " UINT64PF
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"\n"
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"RW-sx spins " UINT64PF ", rounds " UINT64PF
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","
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" OS waits " UINT64PF "\n",
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(uint64_t)rw_lock_stats.rw_s_spin_wait_count,
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(uint64_t)rw_lock_stats.rw_s_spin_round_count,
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(uint64_t)rw_lock_stats.rw_s_os_wait_count,
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(uint64_t)rw_lock_stats.rw_x_spin_wait_count,
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(uint64_t)rw_lock_stats.rw_x_spin_round_count,
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(uint64_t)rw_lock_stats.rw_x_os_wait_count,
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(uint64_t)rw_lock_stats.rw_sx_spin_wait_count,
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(uint64_t)rw_lock_stats.rw_sx_spin_round_count,
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(uint64_t)rw_lock_stats.rw_sx_os_wait_count);
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fprintf(
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file,
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"Spin rounds per wait: %.2f RW-shared,"
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" %.2f RW-excl, %.2f RW-sx\n",
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(double)rw_lock_stats.rw_s_spin_round_count /
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std::max(uint64_t(1), (uint64_t)rw_lock_stats.rw_s_spin_wait_count),
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(double)rw_lock_stats.rw_x_spin_round_count /
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std::max(uint64_t(1), (uint64_t)rw_lock_stats.rw_x_spin_wait_count),
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(double)rw_lock_stats.rw_sx_spin_round_count /
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std::max(uint64_t(1), (uint64_t)rw_lock_stats.rw_sx_spin_wait_count));
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}
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/**
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Prints info of the sync system.
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@param file - where to print */
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void sync_print(FILE *file) {
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#ifdef UNIV_DEBUG
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rw_lock_list_print_info(file);
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#endif /* UNIV_DEBUG */
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sync_array_print(file);
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sync_print_wait_info(file);
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}
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/** Print the filename "basename" e.g., p = "/a/b/c/d/e.cc" -> p = "e.cc"
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@param[in] filename Name from where to extract the basename
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@return the basename */
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const char *sync_basename(const char *filename) {
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const char *ptr = filename + strlen(filename) - 1;
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while (ptr > filename && *ptr != '/' && *ptr != '\\') {
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--ptr;
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}
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++ptr;
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return (ptr);
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}
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/** String representation of the filename and line number where the
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latch was created
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@param[in] id Latch ID
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@param[in] created Filename and line number where it was crated
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@return the string representation */
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std::string sync_mutex_to_string(latch_id_t id, const std::string &created) {
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std::ostringstream msg;
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msg << "Mutex " << sync_latch_get_name(id) << " "
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<< "created " << created;
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return (msg.str());
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}
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/** Enable the mutex monitoring */
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void MutexMonitor::enable() {
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/** Note: We don't add any latch meta-data after startup. Therefore
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there is no need to use a mutex here. */
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LatchMetaData::iterator end = latch_meta.end();
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for (LatchMetaData::iterator it = latch_meta.begin(); it != end; ++it) {
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if (*it != NULL) {
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(*it)->get_counter()->enable();
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}
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}
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}
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/** Disable the mutex monitoring */
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void MutexMonitor::disable() {
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/** Note: We don't add any latch meta-data after startup. Therefore
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there is no need to use a mutex here. */
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LatchMetaData::iterator end = latch_meta.end();
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for (LatchMetaData::iterator it = latch_meta.begin(); it != end; ++it) {
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if (*it != NULL) {
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(*it)->get_counter()->disable();
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}
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}
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}
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/** Reset the mutex monitoring counters */
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void MutexMonitor::reset() {
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/** Note: We don't add any latch meta-data after startup. Therefore
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there is no need to use a mutex here. */
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LatchMetaData::iterator end = latch_meta.end();
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for (LatchMetaData::iterator it = latch_meta.begin(); it != end; ++it) {
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if (*it != NULL) {
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(*it)->get_counter()->reset();
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}
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}
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mutex_enter(&rw_lock_list_mutex);
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for (rw_lock_t *rw_lock = UT_LIST_GET_FIRST(rw_lock_list); rw_lock != NULL;
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rw_lock = UT_LIST_GET_NEXT(list, rw_lock)) {
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rw_lock->count_os_wait = 0;
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}
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mutex_exit(&rw_lock_list_mutex);
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}
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