Current File : //usr/include/mysql/server/private/sql_profile.h
/* 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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