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nginx-push-stream-module
Commit 64f0dc1a authored by Wandenberg Peixoto's avatar Wandenberg Peixoto
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unifying types: ngx_http_push_stream_worker_subscriber_t and... 

unifying types: ngx_http_push_stream_worker_subscriber_t and ngx_http_push_stream_subscriber_t to reduce memory consumption
parent 486d49fa
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Showing with 107 additions and 104 deletions
include/ngx_http_push_stream_module.h
View file @ 64f0dc1a
......@@ -31,6 +31,11 @@
#include <ngx_http.h>
#include <nginx.h>
typedef struct {
ngx_queue_t queue;
void *value;
} ngx_http_push_stream_queue_elem_t;
// template queue
typedef struct {
ngx_queue_t queue; // this MUST be first
......@@ -95,19 +100,13 @@ typedef struct {
} ngx_http_push_stream_msg_t;
typedef struct ngx_http_push_stream_subscriber_cleanup_s ngx_http_push_stream_subscriber_cleanup_t;
// subscriber request queue
typedef struct {
ngx_queue_t queue; // this MUST be first
ngx_http_request_t *request;
ngx_flag_t longpolling;
} ngx_http_push_stream_subscriber_t;
typedef struct ngx_http_push_stream_subscriber_s ngx_http_push_stream_subscriber_t;
typedef struct {
ngx_queue_t queue;
pid_t pid;
ngx_int_t slot;
ngx_http_push_stream_subscriber_t subscriber_sentinel;
ngx_http_push_stream_queue_elem_t subscribers_sentinel;
} ngx_http_push_stream_pid_queue_t;
// our typecast-friendly rbtree node (channel)
......@@ -140,16 +139,17 @@ typedef struct {
ngx_queue_t queue;
ngx_http_push_stream_subscriber_t *subscriber;
ngx_http_push_stream_channel_t *channel;
ngx_http_push_stream_queue_elem_t *channel_subscriber_element_ref;
} ngx_http_push_stream_subscription_t;
typedef struct {
ngx_queue_t queue; // this MUST be first
struct ngx_http_push_stream_subscriber_s {
ngx_http_request_t *request;
ngx_http_push_stream_subscription_t subscriptions_sentinel;
ngx_http_push_stream_subscriber_cleanup_t *clndata;
ngx_pid_t worker_subscribed_pid;
ngx_flag_t longpolling;
} ngx_http_push_stream_worker_subscriber_t;
ngx_http_push_stream_queue_elem_t *worker_subscriber_element_ref;
};
typedef struct {
ngx_event_t *disconnect_timer;
......@@ -159,7 +159,7 @@ typedef struct {
// cleaning supplies
struct ngx_http_push_stream_subscriber_cleanup_s {
ngx_http_push_stream_worker_subscriber_t *worker_subscriber;
ngx_http_push_stream_subscriber_t *worker_subscriber;
};
// messages to worker processes
......@@ -168,12 +168,12 @@ typedef struct {
ngx_http_push_stream_msg_t *msg; // ->shared memory
ngx_pid_t pid;
ngx_http_push_stream_channel_t *channel; // ->shared memory
ngx_http_push_stream_subscriber_t *subscriber_sentinel; // ->a worker's local pool
ngx_http_push_stream_queue_elem_t *subscribers_sentinel; // ->a worker's local pool
} ngx_http_push_stream_worker_msg_t;
typedef struct {
ngx_http_push_stream_worker_msg_t *messages_queue;
ngx_http_push_stream_worker_subscriber_t *worker_subscribers_sentinel;
ngx_http_push_stream_queue_elem_t *subscribers_sentinel;
ngx_uint_t subscribers; // # of subscribers in the worker
time_t startup;
pid_t pid;
......
include/ngx_http_push_stream_module_ipc.h
View file @ 64f0dc1a
......@@ -56,7 +56,7 @@ static ngx_int_t ngx_http_push_stream_alert_worker(ngx_pid_t pid, ngx_int
#define ngx_http_push_stream_alert_worker_census_subscribers(pid, slot, log) ngx_http_push_stream_alert_worker(pid, slot, log, NGX_CMD_HTTP_PUSH_STREAM_CENSUS_SUBSCRIBERS);
#define ngx_http_push_stream_alert_worker_delete_channel(pid, slot, log) ngx_http_push_stream_alert_worker(pid, slot, log, NGX_CMD_HTTP_PUSH_STREAM_DELETE_CHANNEL);
static ngx_int_t ngx_http_push_stream_send_worker_message(ngx_http_push_stream_channel_t *channel, ngx_http_push_stream_subscriber_t *subscriber_sentinel, ngx_pid_t pid, ngx_int_t worker_slot, ngx_http_push_stream_msg_t *msg, ngx_log_t *log);
static ngx_int_t ngx_http_push_stream_send_worker_message(ngx_http_push_stream_channel_t *channel, ngx_http_push_stream_queue_elem_t *subscribers_sentinel, ngx_pid_t pid, ngx_int_t worker_slot, ngx_http_push_stream_msg_t *msg, ngx_log_t *log);
static ngx_int_t ngx_http_push_stream_init_ipc(ngx_cycle_t *cycle, ngx_int_t workers);
static void ngx_http_push_stream_ipc_exit_worker(ngx_cycle_t *cycle);
......@@ -67,6 +67,6 @@ static void ngx_http_push_stream_channel_handler(ngx_event_t *ev);
static ngx_inline void ngx_http_push_stream_process_worker_message(void);
static ngx_inline void ngx_http_push_stream_census_worker_subscribers(void);
static ngx_int_t ngx_http_push_stream_respond_to_subscribers(ngx_http_push_stream_channel_t *channel, ngx_http_push_stream_subscriber_t *sentinel, ngx_http_push_stream_msg_t *msg);
static ngx_int_t ngx_http_push_stream_respond_to_subscribers(ngx_http_push_stream_channel_t *channel, ngx_http_push_stream_queue_elem_t *subscribers_sentinel, ngx_http_push_stream_msg_t *msg);
#endif /* NGX_HTTP_PUSH_STREAM_MODULE_IPC_H_ */
include/ngx_http_push_stream_module_utils.h
View file @ 64f0dc1a
......@@ -241,7 +241,7 @@ static void ngx_http_push_stream_timer_reset(ngx_msec_t timer_in
#define ngx_http_push_stream_memory_cleanup_timer_set() ngx_http_push_stream_timer_set(ngx_http_push_stream_module_main_conf->memory_cleanup_interval, &ngx_http_push_stream_memory_cleanup_event, ngx_http_push_stream_memory_cleanup_timer_wake_handler, 1);
#define ngx_http_push_stream_buffer_cleanup_timer_set(pslcf) ngx_http_push_stream_timer_set(ngx_http_push_stream_module_main_conf->buffer_cleanup_interval, &ngx_http_push_stream_buffer_cleanup_event, ngx_http_push_stream_buffer_timer_wake_handler, pslcf->store_messages);
static void ngx_http_push_stream_worker_subscriber_cleanup_locked(ngx_http_push_stream_worker_subscriber_t *worker_subscriber);
static void ngx_http_push_stream_worker_subscriber_cleanup_locked(ngx_http_push_stream_subscriber_t *worker_subscriber);
static ngx_str_t * ngx_http_push_stream_create_str(ngx_pool_t *pool, uint len);
static void ngx_http_push_stream_mark_message_to_delete_locked(ngx_http_push_stream_msg_t *msg);
......
src/ngx_http_push_stream_module_ipc.c
View file @ 64f0dc1a
......@@ -135,7 +135,7 @@ ngx_http_push_stream_ipc_init_worker()
return NGX_ERROR;
}
if ((data->ipc[ngx_process_slot].worker_subscribers_sentinel == NULL) && ((data->ipc[ngx_process_slot].worker_subscribers_sentinel = ngx_slab_alloc_locked(shpool, sizeof(ngx_http_push_stream_worker_subscriber_t))) == NULL)) {
if ((data->ipc[ngx_process_slot].subscribers_sentinel == NULL) && ((data->ipc[ngx_process_slot].subscribers_sentinel = ngx_slab_alloc_locked(shpool, sizeof(ngx_http_push_stream_queue_elem_t))) == NULL)) {
ngx_shmtx_unlock(&shpool->mutex);
return NGX_ERROR;
}
......@@ -143,7 +143,7 @@ ngx_http_push_stream_ipc_init_worker()
data->ipc[ngx_process_slot].pid = ngx_pid;
data->ipc[ngx_process_slot].startup = ngx_time();
ngx_queue_init(&data->ipc[ngx_process_slot].messages_queue->queue);
ngx_queue_init(&data->ipc[ngx_process_slot].worker_subscribers_sentinel->queue);
ngx_queue_init(&data->ipc[ngx_process_slot].subscribers_sentinel->queue);
data->subscribers = 0;
ngx_http_push_stream_walk_rbtree(ngx_http_push_stream_reset_channel_subscribers_count_locked);
......@@ -177,8 +177,8 @@ ngx_http_push_stream_clean_worker_data()
}
}
if (data->ipc[ngx_process_slot].worker_subscribers_sentinel != NULL) {
ngx_queue_init(&data->ipc[ngx_process_slot].worker_subscribers_sentinel->queue);
if (data->ipc[ngx_process_slot].subscribers_sentinel != NULL) {
ngx_queue_init(&data->ipc[ngx_process_slot].subscribers_sentinel->queue);
}
ngx_shmtx_unlock(&shpool->mutex);
......@@ -257,17 +257,16 @@ ngx_http_push_stream_census_worker_subscribers(void)
ngx_http_push_stream_shm_data_t *data = (ngx_http_push_stream_shm_data_t *) ngx_http_push_stream_shm_zone->data;
ngx_http_push_stream_worker_data_t *workers_data = data->ipc;
ngx_http_push_stream_worker_data_t *thisworker_data = workers_data + ngx_process_slot;
ngx_http_push_stream_worker_subscriber_t *cur, *sentinel;
ngx_http_push_stream_subscription_t *cur_subscription, *sentinel_subscription;
ngx_http_push_stream_queue_elem_t *cur;
ngx_http_push_stream_subscription_t *cur_subscription;
ngx_shmtx_lock(&shpool->mutex);
sentinel = thisworker_data->worker_subscribers_sentinel;
cur = sentinel;
while ((cur = (ngx_http_push_stream_worker_subscriber_t *) ngx_queue_next(&cur->queue)) != sentinel) {
sentinel_subscription = &cur->subscriptions_sentinel;
cur_subscription = sentinel_subscription;
while ((cur_subscription = (ngx_http_push_stream_subscription_t *) ngx_queue_next(&cur_subscription->queue)) != sentinel_subscription) {
cur = thisworker_data->subscribers_sentinel;
while ((cur = (ngx_http_push_stream_queue_elem_t *) ngx_queue_next(&cur->queue)) != thisworker_data->subscribers_sentinel) {
ngx_http_push_stream_subscriber_t *subscriber = (ngx_http_push_stream_subscriber_t *) cur->value;
cur_subscription = &subscriber->subscriptions_sentinel;
while ((cur_subscription = (ngx_http_push_stream_subscription_t *) ngx_queue_next(&cur_subscription->queue)) != &subscriber->subscriptions_sentinel) {
cur_subscription->channel->subscribers++;
}
data->subscribers++;
......@@ -292,7 +291,7 @@ ngx_http_push_stream_process_worker_message(void)
while (worker_msg != sentinel) {
if (worker_msg->pid == ngx_pid) {
// everything is okay
ngx_http_push_stream_respond_to_subscribers(worker_msg->channel, worker_msg->subscriber_sentinel, worker_msg->msg);
ngx_http_push_stream_respond_to_subscribers(worker_msg->channel, worker_msg->subscribers_sentinel, worker_msg->msg);
} else {
// that's quite bad you see. a previous worker died with an undelivered message.
// but all its subscribers' connections presumably got canned, too. so it's not so bad after all.
......@@ -329,7 +328,7 @@ ngx_http_push_stream_process_worker_message(void)
static ngx_int_t
ngx_http_push_stream_send_worker_message(ngx_http_push_stream_channel_t *channel, ngx_http_push_stream_subscriber_t *subscriber_sentinel, ngx_pid_t pid, ngx_int_t worker_slot, ngx_http_push_stream_msg_t *msg, ngx_log_t *log)
ngx_http_push_stream_send_worker_message(ngx_http_push_stream_channel_t *channel, ngx_http_push_stream_queue_elem_t *subscribers_sentinel, ngx_pid_t pid, ngx_int_t worker_slot, ngx_http_push_stream_msg_t *msg, ngx_log_t *log)
{
ngx_slab_pool_t *shpool = (ngx_slab_pool_t *) ngx_http_push_stream_shm_zone->shm.addr;
ngx_http_push_stream_worker_data_t *workers_data = ((ngx_http_push_stream_shm_data_t *) ngx_http_push_stream_shm_zone->data)->ipc;
......@@ -347,7 +346,7 @@ ngx_http_push_stream_send_worker_message(ngx_http_push_stream_channel_t *channel
newmessage->msg = msg;
newmessage->pid = pid;
newmessage->subscriber_sentinel = subscriber_sentinel;
newmessage->subscribers_sentinel = subscribers_sentinel;
newmessage->channel = channel;
ngx_queue_insert_tail(&thisworker_data->messages_queue->queue, &newmessage->queue);
......@@ -369,10 +368,9 @@ ngx_http_push_stream_broadcast(ngx_http_push_stream_channel_t *channel, ngx_http
while ((cur = (ngx_http_push_stream_pid_queue_t *) ngx_queue_next(&cur->queue)) != sentinel) {
pid_t worker_pid = cur->pid;
ngx_int_t worker_slot = cur->slot;
ngx_http_push_stream_subscriber_t *subscriber_sentinel = &cur->subscriber_sentinel;
// interprocess communication breakdown
if (ngx_http_push_stream_send_worker_message(channel, subscriber_sentinel, worker_pid, worker_slot, msg, log) != NGX_ERROR) {
if (ngx_http_push_stream_send_worker_message(channel, &cur->subscribers_sentinel, worker_pid, worker_slot, msg, log) != NGX_ERROR) {
ngx_http_push_stream_alert_worker_check_messages(worker_pid, worker_slot, log);
} else {
ngx_log_error(NGX_LOG_ERR, log, 0, "push stream module: error communicating with some other worker process");
......@@ -387,35 +385,34 @@ ngx_http_push_stream_broadcast(ngx_http_push_stream_channel_t *channel, ngx_http
}
static ngx_int_t
ngx_http_push_stream_respond_to_subscribers(ngx_http_push_stream_channel_t *channel, ngx_http_push_stream_subscriber_t *sentinel, ngx_http_push_stream_msg_t *msg)
ngx_http_push_stream_respond_to_subscribers(ngx_http_push_stream_channel_t *channel, ngx_http_push_stream_queue_elem_t *subscribers_sentinel, ngx_http_push_stream_msg_t *msg)
{
ngx_http_push_stream_subscriber_t *cur;
ngx_http_push_stream_queue_elem_t *cur = subscribers_sentinel;
if (sentinel == NULL) {
if (subscribers_sentinel == NULL) {
return NGX_ERROR;
}
cur = sentinel;
if (msg != NULL) {
// now let's respond to some requests!
while ((cur = (ngx_http_push_stream_subscriber_t *) ngx_queue_next(&cur->queue)) != sentinel) {
if (cur->longpolling) {
ngx_http_push_stream_subscriber_t *prev = (ngx_http_push_stream_subscriber_t *) ngx_queue_prev(&cur->queue);
while ((cur = (ngx_http_push_stream_queue_elem_t *) ngx_queue_next(&cur->queue)) != subscribers_sentinel) {
ngx_http_push_stream_subscriber_t *subscriber = (ngx_http_push_stream_subscriber_t *) cur->value;
if (subscriber->longpolling) {
ngx_http_push_stream_queue_elem_t *prev = (ngx_http_push_stream_queue_elem_t *) ngx_queue_prev(&cur->queue);
ngx_http_push_stream_add_polling_headers(cur->request, msg->time, msg->tag, cur->request->pool);
ngx_http_send_header(cur->request);
ngx_http_push_stream_add_polling_headers(subscriber->request, msg->time, msg->tag, subscriber->request->pool);
ngx_http_send_header(subscriber->request);
ngx_http_push_stream_send_response_content_header(cur->request, ngx_http_get_module_loc_conf(cur->request, ngx_http_push_stream_module));
ngx_http_push_stream_send_response_message(cur->request, channel, msg);
ngx_http_push_stream_send_response_finalize(cur->request);
ngx_http_push_stream_send_response_content_header(subscriber->request, ngx_http_get_module_loc_conf(subscriber->request, ngx_http_push_stream_module));
ngx_http_push_stream_send_response_message(subscriber->request, channel, msg);
ngx_http_push_stream_send_response_finalize(subscriber->request);
cur = prev;
} else {
if (ngx_http_push_stream_send_response_message(cur->request, channel, msg) == NGX_ERROR) {
ngx_http_push_stream_subscriber_t *prev = (ngx_http_push_stream_subscriber_t *) ngx_queue_prev(&cur->queue);
ngx_http_push_stream_send_response_finalize(cur->request);
if (ngx_http_push_stream_send_response_message(subscriber->request, channel, msg) == NGX_ERROR) {
ngx_http_push_stream_queue_elem_t *prev = (ngx_http_push_stream_queue_elem_t *) ngx_queue_prev(&cur->queue);
ngx_http_push_stream_send_response_finalize(subscriber->request);
cur = prev;
}
}
......
src/ngx_http_push_stream_module_setup.c
View file @ 64f0dc1a
......@@ -737,7 +737,7 @@ ngx_http_push_stream_init_shm_zone(ngx_shm_zone_t *shm_zone, void *data)
d->ipc[i].startup = 0;
d->ipc[i].subscribers = 0;
d->ipc[i].messages_queue = NULL;
d->ipc[i].worker_subscribers_sentinel = NULL;
d->ipc[i].subscribers_sentinel = NULL;
}
d->startup = ngx_time();
......
src/ngx_http_push_stream_module_utils.c
View file @ 64f0dc1a
......@@ -59,10 +59,10 @@ ngx_http_push_stream_delete_unrecoverable_channels(ngx_http_push_stream_shm_data
{
ngx_http_push_stream_channel_t *channel;
ngx_http_push_stream_pid_queue_t *cur_worker;
ngx_http_push_stream_subscriber_t *cur;
ngx_http_push_stream_queue_elem_t *cur;
ngx_http_push_stream_worker_data_t *workers_data = ((ngx_http_push_stream_shm_data_t *) ngx_http_push_stream_shm_zone->data)->ipc;
ngx_http_push_stream_worker_data_t *thisworker_data = workers_data + ngx_process_slot;
ngx_http_push_stream_worker_subscriber_t *worker_subscriber;
ngx_http_push_stream_queue_elem_t *cur_subscriber;
ngx_http_push_stream_subscription_t *cur_subscription;
channel = (ngx_http_push_stream_channel_t *) node;
......@@ -87,13 +87,15 @@ ngx_http_push_stream_delete_unrecoverable_channels(ngx_http_push_stream_shm_data
if (cur_worker->slot == ngx_process_slot) {
// to each subscriber of this channel in this worker
while(!ngx_queue_empty(&cur_worker->subscriber_sentinel.queue)) {
cur = (ngx_http_push_stream_subscriber_t *) ngx_queue_next(&cur_worker->subscriber_sentinel.queue);
while(!ngx_queue_empty(&cur_worker->subscribers_sentinel.queue)) {
cur = (ngx_http_push_stream_queue_elem_t *) ngx_queue_next(&cur_worker->subscribers_sentinel.queue);
ngx_http_push_stream_subscriber_t *subscriber = (ngx_http_push_stream_subscriber_t *) cur->value;
// find the subscriber subscriptions on the worker
worker_subscriber = thisworker_data->worker_subscribers_sentinel;
while ((worker_subscriber = (ngx_http_push_stream_worker_subscriber_t *) ngx_queue_next(&worker_subscriber->queue)) != thisworker_data->worker_subscribers_sentinel) {
if (worker_subscriber->request == cur->request) {
cur_subscriber = thisworker_data->subscribers_sentinel;
while ((cur_subscriber = (ngx_http_push_stream_queue_elem_t *) ngx_queue_next(&cur_subscriber->queue)) != thisworker_data->subscribers_sentinel) {
ngx_http_push_stream_subscriber_t *worker_subscriber = (ngx_http_push_stream_subscriber_t *) cur_subscriber->value;
if (worker_subscriber->request == subscriber->request) {
// find the subscription for the channel being deleted
cur_subscription = &worker_subscriber->subscriptions_sentinel;
......@@ -108,7 +110,7 @@ ngx_http_push_stream_delete_unrecoverable_channels(ngx_http_push_stream_shm_data
ngx_queue_remove(&cur->queue);
ngx_shmtx_unlock(&shpool->mutex);
ngx_http_push_stream_send_response_message(cur->request, channel, channel->channel_deleted_message);
ngx_http_push_stream_send_response_message(subscriber->request, channel, channel->channel_deleted_message);
break;
}
......@@ -638,19 +640,17 @@ ngx_http_push_stream_free_memory_of_expired_messages_and_channels(ngx_flag_t for
{
ngx_slab_pool_t *shpool = (ngx_slab_pool_t *) ngx_http_push_stream_shm_zone->shm.addr;
ngx_http_push_stream_shm_data_t *data = (ngx_http_push_stream_shm_data_t *) ngx_http_push_stream_shm_zone->data;
ngx_http_push_stream_msg_t *sentinel, *cur, *next;
sentinel = &data->messages_to_delete;
ngx_http_push_stream_msg_t *cur, *prev;
ngx_shmtx_lock(&shpool->mutex);
cur = (ngx_http_push_stream_msg_t *)ngx_queue_next(&sentinel->queue);
while (cur != sentinel) {
next = (ngx_http_push_stream_msg_t *)ngx_queue_next(&cur->queue);
cur = &data->messages_to_delete;
while ((cur = (ngx_http_push_stream_msg_t *)ngx_queue_next(&cur->queue)) != &data->messages_to_delete) {
if ((ngx_time() > cur->expires) || force) {
prev = (ngx_http_push_stream_msg_t *)ngx_queue_prev(&cur->queue);
ngx_queue_remove(&cur->queue);
ngx_http_push_stream_free_message_memory_locked(shpool, cur);
cur = prev;
}
cur = next;
}
ngx_http_push_stream_free_memory_of_expired_channels_locked(&data->channels_to_delete, shpool, data->channels_to_delete.root, force);
ngx_shmtx_unlock(&shpool->mutex);
......@@ -665,7 +665,7 @@ ngx_http_push_stream_free_message_memory_locked(ngx_slab_pool_t *shpool, ngx_htt
u_int i;
if (msg->formatted_messages != NULL) {
for(i = 0; i < ngx_http_push_stream_module_main_conf->qtd_templates; i++) {
for (i = 0; i < ngx_http_push_stream_module_main_conf->qtd_templates; i++) {
ngx_str_t *formmated = (msg->formatted_messages + i);
if ((formmated != NULL) && (formmated->data != NULL)) {
ngx_slab_free_locked(shpool, formmated->data);
......@@ -860,7 +860,7 @@ ngx_http_push_stream_format_message(ngx_http_push_stream_channel_t *channel, ngx
static void
ngx_http_push_stream_worker_subscriber_cleanup_locked(ngx_http_push_stream_worker_subscriber_t *worker_subscriber)
ngx_http_push_stream_worker_subscriber_cleanup_locked(ngx_http_push_stream_subscriber_t *worker_subscriber)
{
ngx_http_push_stream_subscription_t *cur, *sentinel;
ngx_http_push_stream_shm_data_t *data = (ngx_http_push_stream_shm_data_t *) ngx_http_push_stream_shm_zone->data;
......@@ -880,12 +880,12 @@ ngx_http_push_stream_worker_subscriber_cleanup_locked(ngx_http_push_stream_worke
while ((cur = (ngx_http_push_stream_subscription_t *) ngx_queue_next(&sentinel->queue)) != sentinel) {
NGX_HTTP_PUSH_STREAM_DECREMENT_COUNTER(cur->channel->subscribers);
ngx_queue_remove(&cur->subscriber->queue);
ngx_queue_remove(&cur->channel_subscriber_element_ref->queue);
ngx_queue_remove(&cur->queue);
}
ngx_queue_init(&sentinel->queue);
ngx_queue_remove(&worker_subscriber->queue);
ngx_queue_init(&worker_subscriber->queue);
ngx_queue_remove(&worker_subscriber->worker_subscriber_element_ref->queue);
ngx_queue_init(&worker_subscriber->worker_subscriber_element_ref->queue);
worker_subscriber->clndata->worker_subscriber = NULL;
NGX_HTTP_PUSH_STREAM_DECREMENT_COUNTER(data->subscribers);
NGX_HTTP_PUSH_STREAM_DECREMENT_COUNTER((data->ipc + ngx_process_slot)->subscribers);
......
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