hsa: proxy wnd update only if enough space is available

Type: fix

Signed-off-by: Florin Coras <fcoras@cisco.com>
Change-Id: I2874d3afbf4cc89209b605c35ca4a5bc5b6868b3

1 files changed, 16 insertions, 0 deletions

diff --git a/src/plugins/hs_apps/proxy.c b/src/plugins/hs_apps/proxy.c
index ad5b292c56d..a520110dce8 100644
--- a/src/plugins/hs_apps/proxy.c
+++ b/src/plugins/hs_apps/proxy.c
@@ -271,8 +271,16 @@ proxy_tx_callback (session_t * proxy_s)
   session_handle_t handle;
   proxy_session_t *ps;
   session_t *ao_s;
+  u32 min_free;
   uword *p;
 
+  min_free = clib_min (proxy_s->tx_fifo->nitems >> 3, 128 << 10);
+  if (svm_fifo_max_enqueue (proxy_s->tx_fifo) < min_free)
+    {
+      svm_fifo_add_want_deq_ntf (proxy_s->tx_fifo, SVM_FIFO_WANT_DEQ_NOTIF);
+      return 0;
+    }
+
   clib_spinlock_lock_if_init (&pm->sessions_lock);
 
   handle = session_handle (proxy_s);
@@ -414,8 +422,16 @@ active_open_tx_callback (session_t * ao_s)
   session_handle_t handle;
   proxy_session_t *ps;
   session_t *proxy_s;
+  u32 min_free;
   uword *p;
 
+  min_free = clib_min (ao_s->tx_fifo->nitems >> 3, 128 << 10);
+  if (svm_fifo_max_enqueue (ao_s->tx_fifo) < min_free)
+    {
+      svm_fifo_add_want_deq_ntf (ao_s->tx_fifo, SVM_FIFO_WANT_DEQ_NOTIF);
+      return 0;
+    }
+
   clib_spinlock_lock_if_init (&pm->sessions_lock);
 
   handle = session_handle (ao_s);