session/svm: add want_tx_event flag to fifo

[vpp.git] / src / vnet / session / session_node.c

diff --git a/src/vnet/session/session_node.c b/src/vnet/session/session_node.c
index f5aed74..e2a6f4c 100644 (file)
--- a/src/vnet/session/session_node.c
+++ b/src/vnet/session/session_node.c
@@ -817,7 +817,7 @@ skip_dequeue:
     {
       stream_session_t *s;     /* $$$ prefetch 1 ahead maybe */
       session_event_t *e;
-      u8 is_full;
+      u8 want_tx_evt;
 
       e = &fifo_events[i];
       switch (e->event_type)
@@ -836,18 +836,19 @@ skip_dequeue:
              clib_warning ("It's dead, Jim!");
              continue;
            }
-         is_full = svm_fifo_is_full (s->server_tx_fifo);
 
+         want_tx_evt = svm_fifo_want_tx_evt (s->server_tx_fifo);
          /* Spray packets in per session type frames, since they go to
           * different nodes */
          rv = (smm->session_tx_fns[s->session_type]) (vm, node, e, s,
                                                       &n_tx_packets);
          if (PREDICT_TRUE (rv == SESSION_TX_OK))
            {
-             /* Notify app there's tx space if not polling */
-             if (PREDICT_FALSE (is_full
-                                && !svm_fifo_has_event (s->server_tx_fifo)))
-               session_dequeue_notify (s);
+             if (PREDICT_FALSE (want_tx_evt))
+               {
+                 svm_fifo_set_want_tx_evt (s->server_tx_fifo, 0);
+                 session_dequeue_notify (s);
+               }
            }
          else if (PREDICT_FALSE (rv == SESSION_TX_NO_BUFFERS))
            {