/* Copyright (c) 2010, 2018, Oracle and/or its affiliates. All rights reserved. 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, as published by the Free Software Foundation. This program is also distributed with certain software (including but not limited to OpenSSL) that is licensed under separate terms, as designated in a particular file or component or in included license documentation. The authors of MySQL hereby grant you an additional permission to link the program and your derivative works with the separately licensed software that they have included with MySQL. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License, version 2.0, for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335 USA */ /** @file storage/perfschema/pfs_host.cc Performance schema host (implementation). */ #include "my_global.h" #include "my_sys.h" #include "pfs.h" #include "pfs_stat.h" #include "pfs_instr.h" #include "pfs_setup_actor.h" #include "pfs_host.h" #include "pfs_global.h" #include "pfs_instr_class.h" #include "pfs_buffer_container.h" /** @addtogroup Performance_schema_buffers @{ */ LF_HASH host_hash; static bool host_hash_inited= false; /** Initialize the host buffers. @param param sizing parameters @return 0 on success */ int init_host(const PFS_global_param *param) { if (global_host_container.init(param->m_host_sizing)) return 1; return 0; } /** Cleanup all the host buffers. */ void cleanup_host(void) { global_host_container.cleanup(); } C_MODE_START static uchar *host_hash_get_key(const uchar *entry, size_t *length, my_bool) { const PFS_host * const *typed_entry; const PFS_host *host; const void *result; typed_entry= reinterpret_cast (entry); DBUG_ASSERT(typed_entry != NULL); host= *typed_entry; DBUG_ASSERT(host != NULL); *length= host->m_key.m_key_length; result= host->m_key.m_hash_key; return const_cast (reinterpret_cast (result)); } C_MODE_END /** Initialize the host hash. @return 0 on success */ int init_host_hash(const PFS_global_param *param) { if ((! host_hash_inited) && (param->m_host_sizing != 0)) { lf_hash_init(&host_hash, sizeof(PFS_host*), LF_HASH_UNIQUE, 0, 0, host_hash_get_key, &my_charset_bin); host_hash_inited= true; } return 0; } /** Cleanup the host hash. */ void cleanup_host_hash(void) { if (host_hash_inited) { lf_hash_destroy(&host_hash); host_hash_inited= false; } } static LF_PINS* get_host_hash_pins(PFS_thread *thread) { if (unlikely(thread->m_host_hash_pins == NULL)) { if (! host_hash_inited) return NULL; thread->m_host_hash_pins= lf_hash_get_pins(&host_hash); } return thread->m_host_hash_pins; } static void set_host_key(PFS_host_key *key, const char *host, uint host_length) { DBUG_ASSERT(host_length <= HOSTNAME_LENGTH); char *ptr= &key->m_hash_key[0]; if (host_length > 0) { memcpy(ptr, host, host_length); ptr+= host_length; } ptr[0]= 0; ptr++; key->m_key_length= (uint)(ptr - &key->m_hash_key[0]); } PFS_host *find_or_create_host(PFS_thread *thread, const char *hostname, uint hostname_length) { static PFS_ALIGNED PFS_cacheline_uint32 monotonic; LF_PINS *pins= get_host_hash_pins(thread); if (unlikely(pins == NULL)) { global_host_container.m_lost++; return NULL; } PFS_host_key key; set_host_key(&key, hostname, hostname_length); PFS_host **entry; PFS_host *pfs; uint retry_count= 0; const uint retry_max= 3; pfs_dirty_state dirty_state; search: entry= reinterpret_cast (lf_hash_search(&host_hash, pins, key.m_hash_key, key.m_key_length)); if (entry && (entry != MY_ERRPTR)) { PFS_host *pfs; pfs= *entry; pfs->inc_refcount(); lf_hash_search_unpin(pins); return pfs; } lf_hash_search_unpin(pins); pfs= global_host_container.allocate(& dirty_state); if (pfs != NULL) { pfs->m_key= key; if (hostname_length > 0) pfs->m_hostname= &pfs->m_key.m_hash_key[0]; else pfs->m_hostname= NULL; pfs->m_hostname_length= hostname_length; pfs->init_refcount(); pfs->reset_stats(); pfs->m_disconnected_count= 0; int res; pfs->m_lock.dirty_to_allocated(& dirty_state); res= lf_hash_insert(&host_hash, pins, &pfs); if (likely(res == 0)) { return pfs; } global_host_container.deallocate(pfs); if (res > 0) { if (++retry_count > retry_max) { global_host_container.m_lost++; return NULL; } goto search; } global_host_container.m_lost++; return NULL; } return NULL; } void PFS_host::aggregate(bool alive) { aggregate_waits(); aggregate_stages(); aggregate_statements(); aggregate_transactions(); aggregate_memory(alive); aggregate_status(); aggregate_stats(); } void PFS_host::aggregate_waits() { /* No parent to aggregate to, clean the stats */ reset_waits_stats(); } void PFS_host::aggregate_stages() { if (read_instr_class_stages_stats() == NULL) return; /* Aggregate EVENTS_STAGES_SUMMARY_BY_HOST_BY_EVENT_NAME to: - EVENTS_STAGES_SUMMARY_GLOBAL_BY_EVENT_NAME */ aggregate_all_stages(write_instr_class_stages_stats(), global_instr_class_stages_array); } void PFS_host::aggregate_statements() { if (read_instr_class_statements_stats() == NULL) return; /* Aggregate EVENTS_STATEMENTS_SUMMARY_BY_HOST_BY_EVENT_NAME to: - EVENTS_STATEMENTS_SUMMARY_GLOBAL_BY_EVENT_NAME */ aggregate_all_statements(write_instr_class_statements_stats(), global_instr_class_statements_array); } void PFS_host::aggregate_transactions() { if (read_instr_class_transactions_stats() == NULL) return; /* Aggregate EVENTS_TRANSACTIONS_SUMMARY_BY_HOST_BY_EVENT_NAME to: - EVENTS_TRANSACTIONS_SUMMARY_GLOBAL_BY_EVENT_NAME */ aggregate_all_transactions(write_instr_class_transactions_stats(), &global_transaction_stat); } void PFS_host::aggregate_memory(bool alive) { if (read_instr_class_memory_stats() == NULL) return; /* Aggregate MEMORY_SUMMARY_BY_HOST_BY_EVENT_NAME to: - MEMORY_SUMMARY_GLOBAL_BY_EVENT_NAME */ aggregate_all_memory(alive, write_instr_class_memory_stats(), global_instr_class_memory_array); } void PFS_host::aggregate_status() { /* No parent to aggregate to, clean the stats */ m_status_stats.reset(); } void PFS_host::aggregate_stats() { /* No parent to aggregate to, clean the stats */ m_disconnected_count= 0; } void PFS_host::release() { dec_refcount(); } void PFS_host::carry_memory_stat_delta(PFS_memory_stat_delta *delta, uint index) { PFS_memory_stat *event_name_array; PFS_memory_stat *stat; PFS_memory_stat_delta delta_buffer; PFS_memory_stat_delta *remaining_delta; event_name_array= write_instr_class_memory_stats(); stat= & event_name_array[index]; remaining_delta= stat->apply_delta(delta, &delta_buffer); if (remaining_delta != NULL) carry_global_memory_stat_delta(remaining_delta, index); } PFS_host *sanitize_host(PFS_host *unsafe) { return global_host_container.sanitize(unsafe); } void purge_host(PFS_thread *thread, PFS_host *host) { LF_PINS *pins= get_host_hash_pins(thread); if (unlikely(pins == NULL)) return; PFS_host **entry; entry= reinterpret_cast (lf_hash_search(&host_hash, pins, host->m_key.m_hash_key, host->m_key.m_key_length)); if (entry && (entry != MY_ERRPTR)) { DBUG_ASSERT(*entry == host); if (host->get_refcount() == 0) { lf_hash_delete(&host_hash, pins, host->m_key.m_hash_key, host->m_key.m_key_length); host->aggregate(false); global_host_container.deallocate(host); } } lf_hash_search_unpin(pins); } class Proc_purge_host : public PFS_buffer_processor { public: Proc_purge_host(PFS_thread *thread) : m_thread(thread) {} virtual void operator()(PFS_host *pfs) { pfs->aggregate(true); if (pfs->get_refcount() == 0) purge_host(m_thread, pfs); } private: PFS_thread *m_thread; }; /** Purge non connected hosts, reset stats of connected hosts. */ void purge_all_host(void) { PFS_thread *thread= PFS_thread::get_current_thread(); if (unlikely(thread == NULL)) return; Proc_purge_host proc(thread); global_host_container.apply(proc); } /** @} */