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/* Copyright (c) 2007, 2010, 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 as published by the Free Software Foundation; version 2 of the License. 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 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 St, Fifth Floor, Boston, MA 02110-1335 USA */ #ifndef _SQL_PROFILE_H #define _SQL_PROFILE_H class Item; struct TABLE_LIST; class THD; class ST_FIELD_INFO; typedef struct st_schema_table ST_SCHEMA_TABLE; namespace Show { extern ST_FIELD_INFO query_profile_statistics_info[]; } // namespace Show int fill_query_profile_statistics_info(THD *thd, TABLE_LIST *tables, Item *cond); int make_profile_table_for_show(THD *thd, ST_SCHEMA_TABLE *schema_table); #define PROFILE_NONE (uint)0 #define PROFILE_CPU (uint)(1<<0) #define PROFILE_MEMORY (uint)(1<<1) #define PROFILE_BLOCK_IO (uint)(1<<2) #define PROFILE_CONTEXT (uint)(1<<3) #define PROFILE_PAGE_FAULTS (uint)(1<<4) #define PROFILE_IPC (uint)(1<<5) #define PROFILE_SWAPS (uint)(1<<6) #define PROFILE_SOURCE (uint)(1<<16) #define PROFILE_ALL (uint)(~0) #if defined(ENABLED_PROFILING) #include "sql_priv.h" #include "unireg.h" #ifdef _WIN32 #include <psapi.h> #endif #ifdef HAVE_SYS_RESOURCE_H #include <sys/resource.h> #endif extern PSI_memory_key key_memory_queue_item; class PROF_MEASUREMENT; class QUERY_PROFILE; class PROFILING; /** Implements a persistent FIFO using server List method names. Not thread-safe. Intended to be used on thread-local data only. */ template <class T> class Queue { private: struct queue_item { T *payload; struct queue_item *next, *previous; }; struct queue_item *first, *last; public: Queue() { elements= 0; first= last= NULL; } void empty() { struct queue_item *i, *after_i; for (i= first; i != NULL; i= after_i) { after_i= i->next; my_free(i); } elements= 0; } ulong elements; /* The count of items in the Queue */ void push_back(T *payload) { struct queue_item *new_item; new_item= (struct queue_item *) my_malloc(key_memory_queue_item, sizeof(struct queue_item), MYF(0)); if (!new_item) return; new_item->payload= payload; if (first == NULL) first= new_item; if (last != NULL) { DBUG_ASSERT(last->next == NULL); last->next= new_item; } new_item->previous= last; new_item->next= NULL; last= new_item; elements++; } T *pop() { struct queue_item *old_item= first; T *ret= NULL; if (first == NULL) { DBUG_PRINT("warning", ("tried to pop nonexistent item from Queue")); return NULL; } ret= old_item->payload; if (first->next != NULL) first->next->previous= NULL; else last= NULL; first= first->next; my_free(old_item); elements--; return ret; } bool is_empty() { DBUG_ASSERT(((elements > 0) && (first != NULL)) || ((elements == 0) || (first == NULL))); return (elements == 0); } void *new_iterator() { return first; } void *iterator_next(void *current) { return ((struct queue_item *) current)->next; } T *iterator_value(void *current) { return ((struct queue_item *) current)->payload; } }; /** A single entry in a single profile. */ class PROF_MEASUREMENT { private: friend class QUERY_PROFILE; friend class PROFILING; QUERY_PROFILE *profile; char *status; #ifdef HAVE_GETRUSAGE struct rusage rusage; #elif defined(_WIN32) FILETIME ftKernel, ftUser; IO_COUNTERS io_count; PROCESS_MEMORY_COUNTERS mem_count; #endif char *function; char *file; unsigned int line; ulong m_seq; double time_usecs; char *allocated_status_memory; void set_label(const char *status_arg, const char *function_arg, const char *file_arg, unsigned int line_arg); void clean_up(); PROF_MEASUREMENT(); PROF_MEASUREMENT(QUERY_PROFILE *profile_arg, const char *status_arg); PROF_MEASUREMENT(QUERY_PROFILE *profile_arg, const char *status_arg, const char *function_arg, const char *file_arg, unsigned int line_arg); ~PROF_MEASUREMENT(); void collect(); }; /** The full profile for a single query, and includes multiple PROF_MEASUREMENT objects. */ class QUERY_PROFILE { private: friend class PROFILING; PROFILING *profiling; query_id_t profiling_query_id; /* Session-specific id. */ char *query_source; double m_start_time_usecs; double m_end_time_usecs; ulong m_seq_counter; Queue<PROF_MEASUREMENT> entries; QUERY_PROFILE(PROFILING *profiling_arg, const char *status_arg); ~QUERY_PROFILE(); void set_query_source(char *query_source_arg, size_t query_length_arg); /* Add a profile status change to the current profile. */ void new_status(const char *status_arg, const char *function_arg, const char *file_arg, unsigned int line_arg); /* Reset the contents of this profile entry. */ void reset(); /* Show this profile. This is called by PROFILING. */ bool show(uint options); }; /** Profiling state for a single THD; contains multiple QUERY_PROFILE objects. */ class PROFILING { private: friend class PROF_MEASUREMENT; friend class QUERY_PROFILE; /* Not the system query_id, but a counter unique to profiling. */ query_id_t profile_id_counter; THD *thd; bool keeping; bool enabled; QUERY_PROFILE *current; QUERY_PROFILE *last; Queue<QUERY_PROFILE> history; query_id_t next_profile_id() { return(profile_id_counter++); } public: PROFILING(); ~PROFILING(); /** At a point in execution where we know the query source, save the text of it in the query profile. This must be called exactly once per descrete statement. */ void set_query_source(char *query_source_arg, size_t query_length_arg) { if (unlikely(current)) current->set_query_source(query_source_arg, query_length_arg); } /** Prepare to start processing a new query. It is an error to do this if there's a query already in process; nesting is not supported. @param initial_state (optional) name of period before first state change */ void start_new_query(const char *initial_state= "Starting") { DBUG_ASSERT(!current); if (unlikely(enabled)) { QUERY_PROFILE *new_profile= new QUERY_PROFILE(this, initial_state); if (new_profile) current= new_profile; } } void discard_current_query(); void finish_current_query() { if (unlikely(current)) finish_current_query_impl(); } void finish_current_query_impl(); void status_change(const char *status_arg, const char *function_arg, const char *file_arg, unsigned int line_arg) { if (unlikely(current)) current->new_status(status_arg, function_arg, file_arg, line_arg); } inline void set_thd(THD *thd_arg) { thd= thd_arg; reset(); } /* SHOW PROFILES */ bool show_profiles(); /* ... from INFORMATION_SCHEMA.PROFILING ... */ int fill_statistics_info(THD *thd, TABLE_LIST *tables, Item *cond); void reset(); void restart(); }; # endif /* ENABLED_PROFILING */ #endif /* _SQL_PROFILE_H */
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