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mariadb/storage/perfschema/table_events_waits.cc
Sergei Golubchik 0a99293db3 Merge branch 'merge-perfschema-5.6' into 10.0 
5.6.26
2015-08-03 16:34:59 +02:00

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/* Copyright (c) 2008, 2015, 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,
51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA */
/**
@file storage/perfschema/table_events_waits.cc
Table EVENTS_WAITS_xxx (implementation).
*/
#include "my_global.h"
#include "my_pthread.h"
#include "table_events_waits.h"
#include "pfs_global.h"
#include "pfs_instr_class.h"
#include "pfs_instr.h"
#include "pfs_events_waits.h"
#include "pfs_timer.h"
#include "m_string.h"
THR_LOCK table_events_waits_current::m_table_lock;
static const TABLE_FIELD_TYPE field_types[]=
{
{
{ C_STRING_WITH_LEN("THREAD_ID") },
{ C_STRING_WITH_LEN("bigint(20)") },
{ NULL, 0}
},
{
{ C_STRING_WITH_LEN("EVENT_ID") },
{ C_STRING_WITH_LEN("bigint(20)") },
{ NULL, 0}
},
{
{ C_STRING_WITH_LEN("END_EVENT_ID") },
{ C_STRING_WITH_LEN("bigint(20)") },
{ NULL, 0}
},
{
{ C_STRING_WITH_LEN("EVENT_NAME") },
{ C_STRING_WITH_LEN("varchar(128)") },
{ NULL, 0}
},
{
{ C_STRING_WITH_LEN("SOURCE") },
{ C_STRING_WITH_LEN("varchar(64)") },
{ NULL, 0}
},
{
{ C_STRING_WITH_LEN("TIMER_START") },
{ C_STRING_WITH_LEN("bigint(20)") },
{ NULL, 0}
},
{
{ C_STRING_WITH_LEN("TIMER_END") },
{ C_STRING_WITH_LEN("bigint(20)") },
{ NULL, 0}
},
{
{ C_STRING_WITH_LEN("TIMER_WAIT") },
{ C_STRING_WITH_LEN("bigint(20)") },
{ NULL, 0}
},
{
{ C_STRING_WITH_LEN("SPINS") },
{ C_STRING_WITH_LEN("int(10)") },
{ NULL, 0}
},
{
{ C_STRING_WITH_LEN("OBJECT_SCHEMA") },
{ C_STRING_WITH_LEN("varchar(64)") },
{ NULL, 0}
},
{
{ C_STRING_WITH_LEN("OBJECT_NAME") },
{ C_STRING_WITH_LEN("varchar(512)") },
{ NULL, 0}
},
{
{ C_STRING_WITH_LEN("INDEX_NAME") },
{ C_STRING_WITH_LEN("varchar(64)") },
{ NULL, 0}
},
{
{ C_STRING_WITH_LEN("OBJECT_TYPE") },
{ C_STRING_WITH_LEN("varchar(64)") },
{ NULL, 0}
},
{
{ C_STRING_WITH_LEN("OBJECT_INSTANCE_BEGIN") },
{ C_STRING_WITH_LEN("bigint(20)") },
{ NULL, 0}
},
{
{ C_STRING_WITH_LEN("NESTING_EVENT_ID") },
{ C_STRING_WITH_LEN("bigint(20)") },
{ NULL, 0}
},
{
{ C_STRING_WITH_LEN("NESTING_EVENT_TYPE") },
{ C_STRING_WITH_LEN("enum(\'STATEMENT\',\'STAGE\',\'WAIT\'") },
{ NULL, 0}
},
{
{ C_STRING_WITH_LEN("OPERATION") },
{ C_STRING_WITH_LEN("varchar(32)") },
{ NULL, 0}
},
{
{ C_STRING_WITH_LEN("NUMBER_OF_BYTES") },
{ C_STRING_WITH_LEN("bigint(20)") },
{ NULL, 0}
},
{
{ C_STRING_WITH_LEN("FLAGS") },
{ C_STRING_WITH_LEN("int(10)") },
{ NULL, 0}
}
};
TABLE_FIELD_DEF
table_events_waits_current::m_field_def=
{ 19, field_types, 0, (uint*) 0 };
PFS_engine_table_share
table_events_waits_current::m_share=
{
{ C_STRING_WITH_LEN("events_waits_current") },
&pfs_truncatable_acl,
&table_events_waits_current::create,
NULL, /* write_row */
&table_events_waits_current::delete_all_rows,
NULL, /* get_row_count */
1000, /* records */
sizeof(pos_events_waits_current), /* ref length */
&m_table_lock,
&m_field_def,
false /* checked */
};
THR_LOCK table_events_waits_history::m_table_lock;
PFS_engine_table_share
table_events_waits_history::m_share=
{
{ C_STRING_WITH_LEN("events_waits_history") },
&pfs_truncatable_acl,
&table_events_waits_history::create,
NULL, /* write_row */
&table_events_waits_history::delete_all_rows,
NULL, /* get_row_count */
1000, /* records */
sizeof(pos_events_waits_history), /* ref length */
&m_table_lock,
&table_events_waits_current::m_field_def,
false /* checked */
};
THR_LOCK table_events_waits_history_long::m_table_lock;
PFS_engine_table_share
table_events_waits_history_long::m_share=
{
{ C_STRING_WITH_LEN("events_waits_history_long") },
&pfs_truncatable_acl,
&table_events_waits_history_long::create,
NULL, /* write_row */
&table_events_waits_history_long::delete_all_rows,
NULL, /* get_row_count */
10000, /* records */
sizeof(PFS_simple_index), /* ref length */
&m_table_lock,
&table_events_waits_current::m_field_def,
false /* checked */
};
table_events_waits_common::table_events_waits_common
(const PFS_engine_table_share *share, void *pos)
: PFS_engine_table(share, pos),
m_row_exists(false)
{}
void table_events_waits_common::clear_object_columns()
{
m_row.m_object_type= NULL;
m_row.m_object_type_length= 0;
m_row.m_object_schema_length= 0;
m_row.m_object_name_length= 0;
m_row.m_index_name_length= 0;
m_row.m_object_instance_addr= 0;
}
int table_events_waits_common::make_table_object_columns(volatile PFS_events_waits *wait)
{
uint safe_index;
PFS_table_share *safe_table_share;
safe_table_share= sanitize_table_share(wait->m_weak_table_share);
if (unlikely(safe_table_share == NULL))
return 1;
if (wait->m_object_type == OBJECT_TYPE_TABLE)
{
m_row.m_object_type= "TABLE";
m_row.m_object_type_length= 5;
}
else
{
m_row.m_object_type= "TEMPORARY TABLE";
m_row.m_object_type_length= 15;
}
if (safe_table_share->get_version() == wait->m_weak_version)
{
/* OBJECT SCHEMA */
m_row.m_object_schema_length= safe_table_share->m_schema_name_length;
if (unlikely((m_row.m_object_schema_length == 0) ||
(m_row.m_object_schema_length > sizeof(m_row.m_object_schema))))
return 1;
memcpy(m_row.m_object_schema, safe_table_share->m_schema_name, m_row.m_object_schema_length);
/* OBJECT NAME */
m_row.m_object_name_length= safe_table_share->m_table_name_length;
if (unlikely((m_row.m_object_name_length == 0) ||
(m_row.m_object_name_length > sizeof(m_row.m_object_name))))
return 1;
memcpy(m_row.m_object_name, safe_table_share->m_table_name, m_row.m_object_name_length);
/* INDEX NAME */
safe_index= wait->m_index;
uint safe_key_count= sanitize_index_count(safe_table_share->m_key_count);
if (safe_index < safe_key_count)
{
PFS_table_key *key= & safe_table_share->m_keys[safe_index];
m_row.m_index_name_length= key->m_name_length;
if (unlikely((m_row.m_index_name_length == 0) ||
(m_row.m_index_name_length > sizeof(m_row.m_index_name))))
return 1;
memcpy(m_row.m_index_name, key->m_name, m_row.m_index_name_length);
}
else
m_row.m_index_name_length= 0;
}
else
{
m_row.m_object_schema_length= 0;
m_row.m_object_name_length= 0;
m_row.m_index_name_length= 0;
}
m_row.m_object_instance_addr= (intptr) wait->m_object_instance_addr;
return 0;
}
int table_events_waits_common::make_file_object_columns(volatile PFS_events_waits *wait)
{
PFS_file *safe_file;
safe_file= sanitize_file(wait->m_weak_file);
if (unlikely(safe_file == NULL))
return 1;
m_row.m_object_type= "FILE";
m_row.m_object_type_length= 4;
m_row.m_object_schema_length= 0;
m_row.m_object_instance_addr= (intptr) wait->m_object_instance_addr;
if (safe_file->get_version() == wait->m_weak_version)
{
/* OBJECT NAME */
m_row.m_object_name_length= safe_file->m_filename_length;
if (unlikely((m_row.m_object_name_length == 0) ||
(m_row.m_object_name_length > sizeof(m_row.m_object_name))))
return 1;
memcpy(m_row.m_object_name, safe_file->m_filename, m_row.m_object_name_length);
}
else
{
m_row.m_object_name_length= 0;
}
m_row.m_index_name_length= 0;
return 0;
}
int table_events_waits_common::make_socket_object_columns(volatile PFS_events_waits *wait)
{
PFS_socket *safe_socket;
safe_socket= sanitize_socket(wait->m_weak_socket);
if (unlikely(safe_socket == NULL))
return 1;
m_row.m_object_type= "SOCKET";
m_row.m_object_type_length= 6;
m_row.m_object_schema_length= 0;
m_row.m_object_instance_addr= (intptr) wait->m_object_instance_addr;
if (safe_socket->get_version() == wait->m_weak_version)
{
/* Convert port number to string, include delimiter in port name length */
uint port;
char port_str[128];
char ip_str[INET6_ADDRSTRLEN+1];
/*
"ip_length" was "ip_len" originally.
but it conflicted with some macro on AIX. Renamed.
*/
uint ip_length= 0;
port_str[0]= ':';
/* Get the IP address and port number */
ip_length= pfs_get_socket_address(ip_str, sizeof(ip_str), &port,
&safe_socket->m_sock_addr,
safe_socket->m_addr_len);
/* Convert port number to a string (length includes ':') */
int port_len= int10_to_str(port, (port_str+1), 10) - port_str + 1;
/* OBJECT NAME */
m_row.m_object_name_length= ip_length + port_len;
if (unlikely((m_row.m_object_name_length == 0) ||
(m_row.m_object_name_length > sizeof(m_row.m_object_name))))
return 1;
char *name= m_row.m_object_name;
memcpy(name, ip_str, ip_length);
memcpy(name + ip_length, port_str, port_len);
}
else
{
m_row.m_object_name_length= 0;
}
m_row.m_index_name_length= 0;
return 0;
}
/**
Build a row.
@param thread_own_wait True if the memory for the wait
is owned by pfs_thread
@param pfs_thread the thread the cursor is reading
@param wait the wait the cursor is reading
*/
void table_events_waits_common::make_row(bool thread_own_wait,
PFS_thread *pfs_thread,
volatile PFS_events_waits *wait)
{
pfs_lock lock;
PFS_thread *safe_thread;
PFS_instr_class *safe_class;
const char *base;
const char *safe_source_file;
enum_timer_name timer_name= wait_timer;
ulonglong timer_end;
m_row_exists= false;
safe_thread= sanitize_thread(pfs_thread);
if (unlikely(safe_thread == NULL))
return;
/* Protect this reader against a thread termination */
if (thread_own_wait)
safe_thread->m_lock.begin_optimistic_lock(&lock);
/*
Design choice:
We could have used a pfs_lock in PFS_events_waits here,
to protect the reader from concurrent event generation,
but this leads to too many pfs_lock atomic operations
each time an event is recorded:
- 1 dirty() + 1 allocated() per event start, for EVENTS_WAITS_CURRENT
- 1 dirty() + 1 allocated() per event end, for EVENTS_WAITS_CURRENT
- 1 dirty() + 1 allocated() per copy to EVENTS_WAITS_HISTORY
- 1 dirty() + 1 allocated() per copy to EVENTS_WAITS_HISTORY_LONG
or 8 atomics per recorded event.
The problem is that we record a *lot* of events ...
This code is prepared to accept *dirty* records,
and sanitizes all the data before returning a row.
*/
/*
PFS_events_waits::m_class needs to be sanitized,
for race conditions when this code:
- reads a new value in m_wait_class,
- reads an old value in m_class.
*/
switch (wait->m_wait_class)
{
case WAIT_CLASS_IDLE:
clear_object_columns();
safe_class= sanitize_idle_class(wait->m_class);
timer_name= idle_timer;
break;
case WAIT_CLASS_MUTEX:
clear_object_columns();
safe_class= sanitize_mutex_class((PFS_mutex_class*) wait->m_class);
break;
case WAIT_CLASS_RWLOCK:
clear_object_columns();
safe_class= sanitize_rwlock_class((PFS_rwlock_class*) wait->m_class);
break;
case WAIT_CLASS_COND:
clear_object_columns();
safe_class= sanitize_cond_class((PFS_cond_class*) wait->m_class);
break;
case WAIT_CLASS_TABLE:
if (make_table_object_columns(wait))
return;
safe_class= sanitize_table_class(wait->m_class);
break;
case WAIT_CLASS_FILE:
if (make_file_object_columns(wait))
return;
safe_class= sanitize_file_class((PFS_file_class*) wait->m_class);
break;
case WAIT_CLASS_SOCKET:
if (make_socket_object_columns(wait))
return;
safe_class= sanitize_socket_class((PFS_socket_class*) wait->m_class);
break;
case NO_WAIT_CLASS:
default:
return;
}
if (unlikely(safe_class == NULL))
return;
m_row.m_thread_internal_id= safe_thread->m_thread_internal_id;
m_row.m_event_id= wait->m_event_id;
m_row.m_end_event_id= wait->m_end_event_id;
m_row.m_nesting_event_id= wait->m_nesting_event_id;
m_row.m_nesting_event_type= wait->m_nesting_event_type;
get_normalizer(safe_class);
if (m_row.m_end_event_id == 0)
{
timer_end= get_timer_raw_value(timer_name);
}
else
{
timer_end= wait->m_timer_end;
}
m_normalizer->to_pico(wait->m_timer_start, timer_end,
& m_row.m_timer_start, & m_row.m_timer_end, & m_row.m_timer_wait);
m_row.m_name= safe_class->m_name;
m_row.m_name_length= safe_class->m_name_length;
/*
We are assuming this pointer is sane,
since it comes from __FILE__.
*/
safe_source_file= wait->m_source_file;
if (unlikely(safe_source_file == NULL))
return;
base= base_name(wait->m_source_file);
m_row.m_source_length= my_snprintf(m_row.m_source, sizeof(m_row.m_source),
"%s:%d", base, wait->m_source_line);
if (m_row.m_source_length > sizeof(m_row.m_source))
m_row.m_source_length= sizeof(m_row.m_source);
m_row.m_operation= wait->m_operation;
m_row.m_number_of_bytes= wait->m_number_of_bytes;
m_row.m_flags= wait->m_flags;
if (thread_own_wait)
{
if (safe_thread->m_lock.end_optimistic_lock(&lock))
m_row_exists= true;
}
else
{
/*
For EVENTS_WAITS_HISTORY_LONG (thread_own_wait is false),
the wait record is always valid, because it is not stored
in memory owned by pfs_thread.
Even when the thread terminated, the record is mostly readable,
so this record is displayed.
*/
m_row_exists= true;
}
}
/**
Operations names map, as displayed in the 'OPERATION' column.
Indexed by enum_operation_type - 1.
Note: enum_operation_type contains a more precise definition,
since more details are needed internally by the instrumentation.
Different similar operations (CLOSE vs STREAMCLOSE) are displayed
with the same name 'close'.
*/
static const LEX_STRING operation_names_map[]=
{
/* Mutex operations */
{ C_STRING_WITH_LEN("lock") },
{ C_STRING_WITH_LEN("try_lock") },
/* RWLock operations */
{ C_STRING_WITH_LEN("read_lock") },
{ C_STRING_WITH_LEN("write_lock") },
{ C_STRING_WITH_LEN("try_read_lock") },
{ C_STRING_WITH_LEN("try_write_lock") },
/* Condition operations */
{ C_STRING_WITH_LEN("wait") },
{ C_STRING_WITH_LEN("timed_wait") },
/* File operations */
{ C_STRING_WITH_LEN("create") },
{ C_STRING_WITH_LEN("create") }, /* create tmp */
{ C_STRING_WITH_LEN("open") },
{ C_STRING_WITH_LEN("open") }, /* stream open */
{ C_STRING_WITH_LEN("close") },
{ C_STRING_WITH_LEN("close") }, /* stream close */
{ C_STRING_WITH_LEN("read") },
{ C_STRING_WITH_LEN("write") },
{ C_STRING_WITH_LEN("seek") },
{ C_STRING_WITH_LEN("tell") },
{ C_STRING_WITH_LEN("flush") },
{ C_STRING_WITH_LEN("stat") },
{ C_STRING_WITH_LEN("stat") }, /* fstat */
{ C_STRING_WITH_LEN("chsize") },
{ C_STRING_WITH_LEN("delete") },
{ C_STRING_WITH_LEN("rename") },
{ C_STRING_WITH_LEN("sync") },
/* Table io operations */
{ C_STRING_WITH_LEN("fetch") },
{ C_STRING_WITH_LEN("insert") }, /* write row */
{ C_STRING_WITH_LEN("update") }, /* update row */
{ C_STRING_WITH_LEN("delete") }, /* delete row */
/* Table lock operations */
{ C_STRING_WITH_LEN("read normal") },
{ C_STRING_WITH_LEN("read with shared locks") },
{ C_STRING_WITH_LEN("read high priority") },
{ C_STRING_WITH_LEN("read no inserts") },
{ C_STRING_WITH_LEN("write allow write") },
{ C_STRING_WITH_LEN("write concurrent insert") },
{ C_STRING_WITH_LEN("write delayed") },
{ C_STRING_WITH_LEN("write low priority") },
{ C_STRING_WITH_LEN("write normal") },
{ C_STRING_WITH_LEN("read external") },
{ C_STRING_WITH_LEN("write external") },
/* Socket operations */
{ C_STRING_WITH_LEN("create") },
{ C_STRING_WITH_LEN("connect") },
{ C_STRING_WITH_LEN("bind") },
{ C_STRING_WITH_LEN("close") },
{ C_STRING_WITH_LEN("send") },
{ C_STRING_WITH_LEN("recv") },
{ C_STRING_WITH_LEN("sendto") },
{ C_STRING_WITH_LEN("recvfrom") },
{ C_STRING_WITH_LEN("sendmsg") },
{ C_STRING_WITH_LEN("recvmsg") },
{ C_STRING_WITH_LEN("seek") },
{ C_STRING_WITH_LEN("opt") },
{ C_STRING_WITH_LEN("stat") },
{ C_STRING_WITH_LEN("shutdown") },
{ C_STRING_WITH_LEN("select") },
/* Idle operations */
{ C_STRING_WITH_LEN("idle") }
};
int table_events_waits_common::read_row_values(TABLE *table,
unsigned char *buf,
Field **fields,
bool read_all)
{
Field *f;
const LEX_STRING *operation;
compile_time_assert(COUNT_OPERATION_TYPE ==
array_elements(operation_names_map));
if (unlikely(! m_row_exists))
return HA_ERR_RECORD_DELETED;
/* Set the null bits */
DBUG_ASSERT(table->s->null_bytes == 2);
buf[0]= 0;
buf[1]= 0;
/*
Some columns are unreliable, because they are joined with other buffers,
which could have changed and been reused for something else.
These columns are:
- THREAD_ID (m_thread joins with PFS_thread),
- SCHEMA_NAME (m_schema_name joins with PFS_table_share)
- OBJECT_NAME (m_object_name joins with PFS_table_share)
*/
for (; (f= *fields) ; fields++)
{
if (read_all || bitmap_is_set(table->read_set, f->field_index))
{
switch(f->field_index)
{
case 0: /* THREAD_ID */
set_field_ulonglong(f, m_row.m_thread_internal_id);
break;
case 1: /* EVENT_ID */
set_field_ulonglong(f, m_row.m_event_id);
break;
case 2: /* END_EVENT_ID */
if (m_row.m_end_event_id > 0)
set_field_ulonglong(f, m_row.m_end_event_id - 1);
else
f->set_null();
break;
case 3: /* EVENT_NAME */
set_field_varchar_utf8(f, m_row.m_name, m_row.m_name_length);
break;
case 4: /* SOURCE */
set_field_varchar_utf8(f, m_row.m_source, m_row.m_source_length);
break;
case 5: /* TIMER_START */
if (m_row.m_timer_start != 0)
set_field_ulonglong(f, m_row.m_timer_start);
else
f->set_null();
break;
case 6: /* TIMER_END */
if (m_row.m_timer_end != 0)
set_field_ulonglong(f, m_row.m_timer_end);
else
f->set_null();
break;
case 7: /* TIMER_WAIT */
if (m_row.m_timer_wait != 0)
set_field_ulonglong(f, m_row.m_timer_wait);
else
f->set_null();
break;
case 8: /* SPINS */
f->set_null();
break;
case 9: /* OBJECT_SCHEMA */
if (m_row.m_object_schema_length > 0)
{
set_field_varchar_utf8(f, m_row.m_object_schema,
m_row.m_object_schema_length);
}
else
f->set_null();
break;
case 10: /* OBJECT_NAME */
if (m_row.m_object_name_length > 0)
{
set_field_varchar_utf8(f, m_row.m_object_name,
m_row.m_object_name_length);
}
else
f->set_null();
break;
case 11: /* INDEX_NAME */
if (m_row.m_index_name_length > 0)
{
set_field_varchar_utf8(f, m_row.m_index_name,
m_row.m_index_name_length);
}
else
f->set_null();
break;
case 12: /* OBJECT_TYPE */
if (m_row.m_object_type)
{
set_field_varchar_utf8(f, m_row.m_object_type,
m_row.m_object_type_length);
}
else
f->set_null();
break;
case 13: /* OBJECT_INSTANCE */
set_field_ulonglong(f, m_row.m_object_instance_addr);
break;
case 14: /* NESTING_EVENT_ID */
if (m_row.m_nesting_event_id != 0)
set_field_ulonglong(f, m_row.m_nesting_event_id);
else
f->set_null();
break;
case 15: /* NESTING_EVENT_TYPE */
if (m_row.m_nesting_event_id != 0)
set_field_enum(f, m_row.m_nesting_event_type);
else
f->set_null();
break;
case 16: /* OPERATION */
operation= &operation_names_map[(int) m_row.m_operation - 1];
set_field_varchar_utf8(f, operation->str, operation->length);
break;
case 17: /* NUMBER_OF_BYTES */
if ((m_row.m_operation == OPERATION_TYPE_FILEREAD) ||
(m_row.m_operation == OPERATION_TYPE_FILEWRITE) ||
(m_row.m_operation == OPERATION_TYPE_FILECHSIZE) ||
(m_row.m_operation == OPERATION_TYPE_SOCKETSEND) ||
(m_row.m_operation == OPERATION_TYPE_SOCKETRECV) ||
(m_row.m_operation == OPERATION_TYPE_SOCKETSENDTO) ||
(m_row.m_operation == OPERATION_TYPE_SOCKETRECVFROM))
set_field_ulonglong(f, m_row.m_number_of_bytes);
else
f->set_null();
break;
case 18: /* FLAGS */
f->set_null();
break;
default:
DBUG_ASSERT(false);
}
}
}
return 0;
}
PFS_engine_table* table_events_waits_current::create(void)
{
return new table_events_waits_current();
}
table_events_waits_current::table_events_waits_current()
: table_events_waits_common(&m_share, &m_pos),
m_pos(), m_next_pos()
{}
void table_events_waits_current::reset_position(void)
{
m_pos.reset();
m_next_pos.reset();
}
int table_events_waits_current::rnd_next(void)
{
PFS_thread *pfs_thread;
PFS_events_waits *wait;
for (m_pos.set_at(&m_next_pos);
m_pos.m_index_1 < thread_max;
m_pos.next_thread())
{
pfs_thread= &thread_array[m_pos.m_index_1];
if (! pfs_thread->m_lock.is_populated())
{
/* This thread does not exist */
continue;
}
/*
We do not show nested events for now,
this will be revised with TABLE io
*/
// #define ONLY_SHOW_ONE_WAIT
#ifdef ONLY_SHOW_ONE_WAIT
if (m_pos.m_index_2 >= 1)
continue;
#else
/* m_events_waits_stack[0] is a dummy record */
PFS_events_waits *top_wait = &pfs_thread->m_events_waits_stack[WAIT_STACK_BOTTOM];
wait= &pfs_thread->m_events_waits_stack[m_pos.m_index_2 + WAIT_STACK_BOTTOM];
PFS_events_waits *safe_current = pfs_thread->m_events_waits_current;
if (safe_current == top_wait)
{
/* Display the last top level wait, when completed */
if (m_pos.m_index_2 >= 1)
continue;
}
else
{
/* Display all pending waits, when in progress */
if (wait >= safe_current)
continue;
}
#endif
if (wait->m_wait_class == NO_WAIT_CLASS)
{
/*
This locker does not exist.
There can not be more lockers in the stack, skip to the next thread
*/
continue;
}
make_row(true, pfs_thread, wait);
/* Next iteration, look for the next locker in this thread */
m_next_pos.set_after(&m_pos);
return 0;
}
return HA_ERR_END_OF_FILE;
}
int table_events_waits_current::rnd_pos(const void *pos)
{
PFS_thread *pfs_thread;
PFS_events_waits *wait;
set_position(pos);
DBUG_ASSERT(m_pos.m_index_1 < thread_max);
pfs_thread= &thread_array[m_pos.m_index_1];
if (! pfs_thread->m_lock.is_populated())
return HA_ERR_RECORD_DELETED;
#ifdef ONLY_SHOW_ONE_WAIT
if (m_pos.m_index_2 >= 1)
return HA_ERR_RECORD_DELETED;
#else
/* m_events_waits_stack[0] is a dummy record */
PFS_events_waits *top_wait = &pfs_thread->m_events_waits_stack[WAIT_STACK_BOTTOM];
wait= &pfs_thread->m_events_waits_stack[m_pos.m_index_2 + WAIT_STACK_BOTTOM];
PFS_events_waits *safe_current = pfs_thread->m_events_waits_current;
if (safe_current == top_wait)
{
/* Display the last top level wait, when completed */
if (m_pos.m_index_2 >= 1)
return HA_ERR_RECORD_DELETED;
}
else
{
/* Display all pending waits, when in progress */
if (wait >= safe_current)
return HA_ERR_RECORD_DELETED;
}
#endif
DBUG_ASSERT(m_pos.m_index_2 < WAIT_STACK_LOGICAL_SIZE);
if (wait->m_wait_class == NO_WAIT_CLASS)
return HA_ERR_RECORD_DELETED;
make_row(true, pfs_thread, wait);
return 0;
}
int table_events_waits_current::delete_all_rows(void)
{
reset_events_waits_current();
return 0;
}
PFS_engine_table* table_events_waits_history::create(void)
{
return new table_events_waits_history();
}
table_events_waits_history::table_events_waits_history()
: table_events_waits_common(&m_share, &m_pos),
m_pos(), m_next_pos()
{}
void table_events_waits_history::reset_position(void)
{
m_pos.reset();
m_next_pos.reset();
}
int table_events_waits_history::rnd_next(void)
{
PFS_thread *pfs_thread;
PFS_events_waits *wait;
if (events_waits_history_per_thread == 0)
return HA_ERR_END_OF_FILE;
for (m_pos.set_at(&m_next_pos);
m_pos.m_index_1 < thread_max;
m_pos.next_thread())
{
pfs_thread= &thread_array[m_pos.m_index_1];
if (! pfs_thread->m_lock.is_populated())
{
/* This thread does not exist */
continue;
}
if (m_pos.m_index_2 >= events_waits_history_per_thread)
{
/* This thread does not have more (full) history */
continue;
}
if ( ! pfs_thread->m_waits_history_full &&
(m_pos.m_index_2 >= pfs_thread->m_waits_history_index))
{
/* This thread does not have more (not full) history */
continue;
}
if (pfs_thread->m_waits_history[m_pos.m_index_2].m_wait_class
== NO_WAIT_CLASS)
{
/*
This locker does not exist.
There can not be more lockers in the stack, skip to the next thread
*/
continue;
}
wait= &pfs_thread->m_waits_history[m_pos.m_index_2];
make_row(true, pfs_thread, wait);
/* Next iteration, look for the next history in this thread */
m_next_pos.set_after(&m_pos);
return 0;
}
return HA_ERR_END_OF_FILE;
}
int table_events_waits_history::rnd_pos(const void *pos)
{
PFS_thread *pfs_thread;
PFS_events_waits *wait;
DBUG_ASSERT(events_waits_history_per_thread != 0);
set_position(pos);
DBUG_ASSERT(m_pos.m_index_1 < thread_max);
pfs_thread= &thread_array[m_pos.m_index_1];
if (! pfs_thread->m_lock.is_populated())
return HA_ERR_RECORD_DELETED;
DBUG_ASSERT(m_pos.m_index_2 < events_waits_history_per_thread);
if ( ! pfs_thread->m_waits_history_full &&
(m_pos.m_index_2 >= pfs_thread->m_waits_history_index))
return HA_ERR_RECORD_DELETED;
wait= &pfs_thread->m_waits_history[m_pos.m_index_2];
if (wait->m_wait_class == NO_WAIT_CLASS)
return HA_ERR_RECORD_DELETED;
make_row(true, pfs_thread, wait);
return 0;
}
int table_events_waits_history::delete_all_rows(void)
{
reset_events_waits_history();
return 0;
}
PFS_engine_table* table_events_waits_history_long::create(void)
{
return new table_events_waits_history_long();
}
table_events_waits_history_long::table_events_waits_history_long()
: table_events_waits_common(&m_share, &m_pos),
m_pos(0), m_next_pos(0)
{}
void table_events_waits_history_long::reset_position(void)
{
m_pos.m_index= 0;
m_next_pos.m_index= 0;
}
int table_events_waits_history_long::rnd_next(void)
{
PFS_events_waits *wait;
uint limit;
if (events_waits_history_long_size == 0)
return HA_ERR_END_OF_FILE;
if (events_waits_history_long_full)
limit= events_waits_history_long_size;
else
limit= events_waits_history_long_index % events_waits_history_long_size;
for (m_pos.set_at(&m_next_pos); m_pos.m_index < limit; m_pos.next())
{
wait= &events_waits_history_long_array[m_pos.m_index];
if (wait->m_wait_class != NO_WAIT_CLASS)
{
make_row(false, wait->m_thread, wait);
/* Next iteration, look for the next entry */
m_next_pos.set_after(&m_pos);
return 0;
}
}
return HA_ERR_END_OF_FILE;
}
int table_events_waits_history_long::rnd_pos(const void *pos)
{
PFS_events_waits *wait;
uint limit;
if (events_waits_history_long_size == 0)
return HA_ERR_RECORD_DELETED;
set_position(pos);
if (events_waits_history_long_full)
limit= events_waits_history_long_size;
else
limit= events_waits_history_long_index % events_waits_history_long_size;
if (m_pos.m_index >= limit)
return HA_ERR_RECORD_DELETED;
wait= &events_waits_history_long_array[m_pos.m_index];
if (wait->m_wait_class == NO_WAIT_CLASS)
return HA_ERR_RECORD_DELETED;
make_row(false, wait->m_thread, wait);
return 0;
}
int table_events_waits_history_long::delete_all_rows(void)
{
reset_events_waits_history_long();
return 0;
}
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