refine the tcp nodelay, effect connected connections.

@@ -768,6 +768,17 @@ int SrsConfig::reload_vhost(SrsConfDirective* old_root)
                 }
                 srs_trace("vhost %s reload smi success.", vhost.c_str());
             }
+            // tcp_nodelay, only one per vhost
+            if (!srs_directive_equals(new_vhost->get("tcp_nodelay"), old_vhost->get("tcp_nodelay"))) {
+                for (it = subscribes.begin(); it != subscribes.end(); ++it) {
+                    ISrsReloadHandler* subscribe = *it;
+                    if ((ret = subscribe->on_reload_vhost_tcp_nodelay(vhost)) != ERROR_SUCCESS) {
+                        srs_error("vhost %s notify subscribes tcp_nodelay failed. ret=%d", vhost.c_str(), ret);
+                        return ret;
+                    }
+                }
+                srs_trace("vhost %s reload tcp_nodelay success.", vhost.c_str());
+            }
             // publish_1stpkt_timeout, only one per vhost
             if (!srs_directive_equals(new_vhost->get("publish_1stpkt_timeout"), old_vhost->get("publish_1stpkt_timeout"))) {
                 for (it = subscribes.begin(); it != subscribes.end(); ++it) {

@@ -175,6 +175,11 @@ int ISrsReloadHandler::on_reload_vhost_smi(string /*vhost*/)
     return ERROR_SUCCESS;
 }
 
+int ISrsReloadHandler::on_reload_vhost_tcp_nodelay(string /*vhost*/)
+{
+    return ERROR_SUCCESS;
+}
+
 int ISrsReloadHandler::on_reload_vhost_realtime(string /*vhost*/)
 {
     return ERROR_SUCCESS;

@@ -74,6 +74,7 @@ public:
     virtual int on_reload_vhost_mr(std::string vhost);
     virtual int on_reload_vhost_mw(std::string vhost);
     virtual int on_reload_vhost_smi(std::string vhost);
+    virtual int on_reload_vhost_tcp_nodelay(std::string vhost);
     virtual int on_reload_vhost_realtime(std::string vhost);
     virtual int on_reload_vhost_p1stpt(std::string vhost);
     virtual int on_reload_vhost_pnt(std::string vhost);

@@ -94,6 +94,7 @@ SrsRtmpConn::SrsRtmpConn(SrsServer* svr, st_netfd_t c)
     mw_enabled = false;
     realtime = SRS_PERF_MIN_LATENCY_ENABLED;
     send_min_interval = 0;
+    tcp_nodelay = false;
     
     _srs_config->subscribe(this);
 }
@@ -265,6 +266,19 @@ int SrsRtmpConn::on_reload_vhost_smi(string vhost)
     return ret;
 }
 
+int SrsRtmpConn::on_reload_vhost_tcp_nodelay(string vhost)
+{
+    int ret = ERROR_SUCCESS;
+    
+    if (req->vhost != vhost) {
+        return ret;
+    }
+    
+    set_sock_options();
+    
+    return ret;
+}
+
 int SrsRtmpConn::on_reload_vhost_realtime(string vhost)
 {
     int ret = ERROR_SUCCESS;
@@ -651,8 +665,8 @@ int SrsRtmpConn::do_playing(SrsSource* source, SrsConsumer* consumer, SrsQueueRe
     // set the sock options.
     set_sock_options();
     
-    srs_trace("start play smi=%.2f, mw_sleep=%d, mw_enabled=%d, realtime=%d",
-        send_min_interval, mw_sleep, mw_enabled, realtime);
+    srs_trace("start play smi=%.2f, mw_sleep=%d, mw_enabled=%d, realtime=%d, tcp_nodelay=%d",
+        send_min_interval, mw_sleep, mw_enabled, realtime, tcp_nodelay);
     
     while (!disposed) {
         // collect elapse for pithy print.
@@ -837,15 +851,18 @@ int SrsRtmpConn::do_publishing(SrsSource* source, SrsPublishRecvThread* trd)
         return ret;
     }
     
+    // initialize the publish timeout.
+    publish_1stpkt_timeout = _srs_config->get_publish_1stpkt_timeout(req->vhost);
+    publish_normal_timeout = _srs_config->get_publish_1stpkt_timeout(req->vhost);
+    
     // set the sock options.
     set_sock_options();
     
     if (true) {
         bool mr = _srs_config->get_mr_enabled(req->vhost);
         int mr_sleep = _srs_config->get_mr_sleep_ms(req->vhost);
-        publish_1stpkt_timeout = _srs_config->get_publish_1stpkt_timeout(req->vhost);
-        publish_normal_timeout = _srs_config->get_publish_1stpkt_timeout(req->vhost);
-        srs_trace("start publish mr=%d/%d, p1stpt=%d, pnt=%d", mr, mr_sleep, publish_1stpkt_timeout, publish_normal_timeout);
+        srs_trace("start publish mr=%d/%d, p1stpt=%d, pnt=%d, tcp_nodelay=%d",
+                  mr, mr_sleep, publish_1stpkt_timeout, publish_normal_timeout, tcp_nodelay);
     }
 
     int64_t nb_msgs = 0;
@@ -1173,7 +1190,9 @@ void SrsRtmpConn::change_mw_sleep(int sleep_ms)
 
 void SrsRtmpConn::set_sock_options()
 {
-    if (_srs_config->get_tcp_nodelay(req->vhost)) {
+    bool nvalue = _srs_config->get_tcp_nodelay(req->vhost);
+    if (nvalue != tcp_nodelay) {
+        tcp_nodelay = nvalue;
 #ifdef SRS_PERF_TCP_NODELAY
         int fd = st_netfd_fileno(stfd);
 
@@ -1182,7 +1201,7 @@ void SrsRtmpConn::set_sock_options()
         int ov = 0;
         getsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &ov, &nb_v);
 
-        int v = 1;
+        int v = tcp_nodelay;
         // set the socket send buffer when required larger buffer
         if (setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &v, nb_v) < 0) {
             srs_warn("set sock TCP_NODELAY=%d failed.", v);

@@ -91,6 +91,8 @@ private:
     int publish_1stpkt_timeout;
     // publish normal packet timeout in ms
     int publish_normal_timeout;
+    // whether enable the tcp_nodelay.
+    bool tcp_nodelay;
 public:
     SrsRtmpConn(SrsServer* svr, st_netfd_t c);
     virtual ~SrsRtmpConn();
@@ -103,6 +105,7 @@ public:
     virtual int on_reload_vhost_removed(std::string vhost);
     virtual int on_reload_vhost_mw(std::string vhost);
     virtual int on_reload_vhost_smi(std::string vhost);
+    virtual int on_reload_vhost_tcp_nodelay(std::string vhost);
     virtual int on_reload_vhost_realtime(std::string vhost);
     virtual int on_reload_vhost_p1stpt(std::string vhost);
     virtual int on_reload_vhost_pnt(std::string vhost);