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Code Activity

MDEV-6150 Speed up connection speed by moving creation of THD to new thread

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Creating a CONNECT object on client connect and pass this to the working thread which creates the THD.
Split LOCK_thread_count to different mutexes
Added LOCK_thread_start to syncronize threads
Moved most usage of LOCK_thread_count to dedicated functions
Use next_thread_id() instead of thread_id++

Other things:
- Thread id now starts from 1 instead of 2
- Added cast for thread_id as thread id is now of type my_thread_id
- Made THD->host const (To ensure it's not changed)
- Removed some DBUG_PRINT() about entering/exiting mutex as these was already logged by mutex code
- Fixed that aborted_connects and connection_errors_internal are counted in all cases
- Don't take locks for current_linfo when we set it (not needed as it was 0 before)
This commit is contained in:
Monty
2016-02-01 12:45:39 +02:00
parent 076aa182c2
commit 3d4a7390c1
50 changed files with 878 additions and 551 deletions
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26
mysys/thr_lock.c
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@@ -772,7 +772,7 @@ thr_lock(THR_LOCK_DATA *data, THR_LOCK_INFO *owner, ulong lock_wait_timeout)
mysql_mutex_lock(&lock->mutex);
DBUG_PRINT("lock",("data: 0x%lx thread: 0x%lx lock: 0x%lx type: %d",
(long) data, data->owner->thread_id,
(long) data, (ulong) data->owner->thread_id,
(long) lock, (int) lock_type));
check_locks(lock,(uint) lock_type <= (uint) TL_READ_NO_INSERT ?
"enter read_lock" : "enter write_lock", lock_type, 0);
@@ -809,7 +809,7 @@ thr_lock(THR_LOCK_DATA *data, THR_LOCK_INFO *owner, ulong lock_wait_timeout)
*/
DBUG_PRINT("lock",("write locked 1 by thread: 0x%lx",
lock->write.data->owner->thread_id));
(ulong) lock->write.data->owner->thread_id));
if (thr_lock_owner_equal(data->owner, lock->write.data->owner) ||
(lock->write.data->type <= TL_WRITE_DELAYED &&
(((int) lock_type <= (int) TL_READ_HIGH_PRIORITY) ||
@@ -968,7 +968,7 @@ thr_lock(THR_LOCK_DATA *data, THR_LOCK_INFO *owner, ulong lock_wait_timeout)
goto end;
}
DBUG_PRINT("lock",("write locked 2 by thread: 0x%lx",
lock->write.data->owner->thread_id));
(ulong) lock->write.data->owner->thread_id));
}
else
{
@@ -1004,7 +1004,8 @@ thr_lock(THR_LOCK_DATA *data, THR_LOCK_INFO *owner, ulong lock_wait_timeout)
}
}
DBUG_PRINT("lock",("write locked 3 by thread: 0x%lx type: %d",
lock->read.data->owner->thread_id, data->type));
(ulong) lock->read.data->owner->thread_id,
data->type));
}
#ifdef WITH_WSREP
if (wsrep_break_lock(data, &lock->write, &lock->write_wait))
@@ -1069,7 +1070,7 @@ static inline void free_all_read_locks(THR_LOCK *lock,
}
/* purecov: begin inspected */
DBUG_PRINT("lock",("giving read lock to thread: 0x%lx",
data->owner->thread_id));
(ulong) data->owner->thread_id));
/* purecov: end */
data->cond=0; /* Mark thread free */
mysql_cond_signal(cond);
@@ -1087,8 +1088,9 @@ void thr_unlock(THR_LOCK_DATA *data, uint unlock_flags)
THR_LOCK *lock=data->lock;
enum thr_lock_type lock_type=data->type;
DBUG_ENTER("thr_unlock");
DBUG_PRINT("lock",("data: 0x%lx thread: 0x%lx lock: 0x%lx",
(long) data, data->owner->thread_id, (long) lock));
DBUG_PRINT("lock",("data: %p thread: 0x%lx lock: %p",
data, (ulong) data->owner->thread_id,
lock));
mysql_mutex_lock(&lock->mutex);
check_locks(lock,"start of release lock", lock_type, 0);
@@ -1181,7 +1183,7 @@ static void wake_up_waiters(THR_LOCK *lock)
data->type=TL_WRITE; /* Upgrade lock */
/* purecov: begin inspected */
DBUG_PRINT("lock",("giving write lock of type %d to thread: 0x%lx",
data->type, data->owner->thread_id));
data->type, (ulong) data->owner->thread_id));
/* purecov: end */
{
mysql_cond_t *cond= data->cond;
@@ -1423,9 +1425,9 @@ void thr_multi_unlock(THR_LOCK_DATA **data,uint count, uint unlock_flags)
thr_unlock(*pos, unlock_flags);
else
{
DBUG_PRINT("lock",("Free lock: data: 0x%lx thread: 0x%lx lock: 0x%lx",
(long) *pos, (*pos)->owner->thread_id,
(long) (*pos)->lock));
DBUG_PRINT("lock",("Free lock: data: %p thread: 0x%lx lock: %p",
*pos, (ulong) (*pos)->owner->thread_id,
(*pos)->lock));
}
}
DBUG_VOID_RETURN;
@@ -1673,7 +1675,7 @@ static void thr_print_lock(const char* name,struct st_lock_list *list)
prev= &list->data;
for (data=list->data; data && count++ < MAX_LOCKS ; data=data->next)
{
printf("0x%lx (%lu:%d); ", (ulong) data, data->owner->thread_id,
printf("%p (%lu:%d); ", data, (ulong) data->owner->thread_id,
(int) data->type);
if (data->prev != prev)
printf("\nWarning: prev didn't point at previous lock\n");