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threadpool: Eliminate pointless AO2 usage.

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thread_worker_pair, set_size_data and task_pushed_data structures are
allocated with AO2 objects, passed to a taskprocessor, then released.
They never have multiple owners or use locking so AO2 only adds
overhead.

Change-Id: I2204d2615d9d952670fcb48e0a9c0dd1a6ba5036
changes/72/10472/2
Corey Farrell 8 years ago
parent 265d91a120
commit f06de6900e
1 changed files with 40 additions and 16 deletions
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56
main/threadpool.c
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@ -200,10 +200,10 @@ struct thread_worker_pair {
/*!
* \brief Destructor for thread_worker_pair
*/
static void thread_worker_pair_destructor(void *obj)
static void thread_worker_pair_free(struct thread_worker_pair *pair)
{
struct thread_worker_pair *pair = obj;
ao2_ref(pair->worker, -1);
ast_free(pair);
}
/*!
@ -214,13 +214,14 @@ static void thread_worker_pair_destructor(void *obj)
static struct thread_worker_pair *thread_worker_pair_alloc(struct ast_threadpool *pool,
struct worker_thread *worker)
{
struct thread_worker_pair *pair = ao2_alloc(sizeof(*pair), thread_worker_pair_destructor);
struct thread_worker_pair *pair = ast_malloc(sizeof(*pair));
if (!pair) {
return NULL;
}
pair->pool = pool;
ao2_ref(worker, +1);
pair->worker = worker;
return pair;
}
@ -240,7 +241,7 @@ static int queued_active_thread_idle(void *data)
threadpool_send_state_changed(pair->pool);
ao2_ref(pair, -1);
thread_worker_pair_free(pair);
return 0;
}
@ -257,14 +258,19 @@ static void threadpool_active_thread_idle(struct ast_threadpool *pool,
{
struct thread_worker_pair *pair;
SCOPED_AO2LOCK(lock, pool);
if (pool->shutting_down) {
return;
}
pair = thread_worker_pair_alloc(pool, worker);
if (!pair) {
return;
}
ast_taskprocessor_push(pool->control_tps, queued_active_thread_idle, pair);
if (ast_taskprocessor_push(pool->control_tps, queued_active_thread_idle, pair)) {
thread_worker_pair_free(pair);
}
}
/*!
@ -282,7 +288,7 @@ static int queued_zombie_thread_dead(void *data)
ao2_unlink(pair->pool->zombie_threads, pair->worker);
threadpool_send_state_changed(pair->pool);
ao2_ref(pair, -1);
thread_worker_pair_free(pair);
return 0;
}
@ -297,14 +303,19 @@ static void threadpool_zombie_thread_dead(struct ast_threadpool *pool,
{
struct thread_worker_pair *pair;
SCOPED_AO2LOCK(lock, pool);
if (pool->shutting_down) {
return;
}
pair = thread_worker_pair_alloc(pool, worker);
if (!pair) {
return;
}
ast_taskprocessor_push(pool->control_tps, queued_zombie_thread_dead, pair);
if (ast_taskprocessor_push(pool->control_tps, queued_zombie_thread_dead, pair)) {
thread_worker_pair_free(pair);
}
}
static int queued_idle_thread_dead(void *data)
@ -314,7 +325,7 @@ static int queued_idle_thread_dead(void *data)
ao2_unlink(pair->pool->idle_threads, pair->worker);
threadpool_send_state_changed(pair->pool);
ao2_ref(pair, -1);
thread_worker_pair_free(pair);
return 0;
}
@ -323,14 +334,19 @@ static void threadpool_idle_thread_dead(struct ast_threadpool *pool,
{
struct thread_worker_pair *pair;
SCOPED_AO2LOCK(lock, pool);
if (pool->shutting_down) {
return;
}
pair = thread_worker_pair_alloc(pool, worker);
if (!pair) {
return;
}
ast_taskprocessor_push(pool->control_tps, queued_idle_thread_dead, pair);
if (ast_taskprocessor_push(pool->control_tps, queued_idle_thread_dead, pair)) {
thread_worker_pair_free(pair);
}
}
/*!
@ -447,7 +463,7 @@ struct task_pushed_data {
static struct task_pushed_data *task_pushed_data_alloc(struct ast_threadpool *pool,
int was_empty)
{
struct task_pushed_data *tpd = ao2_alloc(sizeof(*tpd), NULL);
struct task_pushed_data *tpd = ast_malloc(sizeof(*tpd));
if (!tpd) {
return NULL;
@ -549,6 +565,8 @@ static int queued_task_pushed(void *data)
int was_empty = tpd->was_empty;
unsigned int existing_active;
ast_free(tpd);
if (pool->listener && pool->listener->callbacks->task_pushed) {
pool->listener->callbacks->task_pushed(pool, pool->listener, was_empty);
}
@ -565,7 +583,6 @@ static int queued_task_pushed(void *data)
/* If no idle threads could be transitioned to active grow the pool as permitted. */
if (ao2_container_count(pool->active_threads) == existing_active) {
if (!pool->options.auto_increment) {
ao2_ref(tpd, -1);
return 0;
}
grow(pool, pool->options.auto_increment);
@ -575,7 +592,6 @@ static int queued_task_pushed(void *data)
}
threadpool_send_state_changed(pool);
ao2_ref(tpd, -1);
return 0;
}
@ -598,12 +614,15 @@ static void threadpool_tps_task_pushed(struct ast_taskprocessor_listener *listen
if (pool->shutting_down) {
return;
}
tpd = task_pushed_data_alloc(pool, was_empty);
if (!tpd) {
return;
}
ast_taskprocessor_push(pool->control_tps, queued_task_pushed, tpd);
if (ast_taskprocessor_push(pool->control_tps, queued_task_pushed, tpd)) {
ast_free(tpd);
}
}
/*!
@ -790,7 +809,7 @@ struct set_size_data {
static struct set_size_data *set_size_data_alloc(struct ast_threadpool *pool,
unsigned int size)
{
struct set_size_data *ssd = ao2_alloc(sizeof(*ssd), NULL);
struct set_size_data *ssd = ast_malloc(sizeof(*ssd));
if (!ssd) {
return NULL;
}
@ -813,7 +832,7 @@ static struct set_size_data *set_size_data_alloc(struct ast_threadpool *pool,
*/
static int queued_set_size(void *data)
{
RAII_VAR(struct set_size_data *, ssd, data, ao2_cleanup);
struct set_size_data *ssd = data;
struct ast_threadpool *pool = ssd->pool;
unsigned int num_threads = ssd->size;
@ -821,6 +840,8 @@ static int queued_set_size(void *data)
unsigned int current_size = ao2_container_count(pool->active_threads) +
ao2_container_count(pool->idle_threads);
ast_free(ssd);
if (current_size == num_threads) {
ast_debug(3, "Not changing threadpool size since new size %u is the same as current %u\n",
num_threads, current_size);
@ -849,6 +870,7 @@ void ast_threadpool_set_size(struct ast_threadpool *pool, unsigned int size)
{
struct set_size_data *ssd;
SCOPED_AO2LOCK(lock, pool);
if (pool->shutting_down) {
return;
}
@ -858,7 +880,9 @@ void ast_threadpool_set_size(struct ast_threadpool *pool, unsigned int size)
return;
}
ast_taskprocessor_push(pool->control_tps, queued_set_size, ssd);
if (ast_taskprocessor_push(pool->control_tps, queued_set_size, ssd)) {
ast_free(ssd);
}
}
struct ast_threadpool_listener *ast_threadpool_listener_alloc(

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