1 files changed, 35 insertions, 8 deletions

diff --git a/src/vnet/session/segment_manager.c b/src/vnet/session/segment_manager.c
index 31bb0c3aab5..b00bcd5bbc8 100644
--- a/src/vnet/session/segment_manager.c
+++ b/src/vnet/session/segment_manager.c
@@ -599,25 +599,52 @@ segment_manager_dealloc_fifos (u32 segment_index, svm_fifo_t * rx_fifo,
     segment_manager_segment_reader_unlock (sm);
 }
 
+u32
+segment_manager_evt_q_expected_size (u32 q_len)
+{
+  u32 fifo_evt_size, notif_q_size, q_hdrs;
+  u32 msg_q_sz, fifo_evt_ring_sz, session_ntf_ring_sz;
+
+  fifo_evt_size = 1 << max_log2 (sizeof (session_fifo_event_t));
+  notif_q_size = clib_max (16, q_len >> 4);
+
+  msg_q_sz = q_len * sizeof (svm_msg_q_msg_t);
+  fifo_evt_ring_sz = q_len * fifo_evt_size;
+  session_ntf_ring_sz = notif_q_size * 256;
+  q_hdrs = sizeof (svm_queue_t) + sizeof (svm_msg_q_t);
+
+  return (msg_q_sz + fifo_evt_ring_sz + session_ntf_ring_sz + q_hdrs);
+}
+
 /**
  * Allocates shm queue in the first segment
  *
  * Must be called with lock held
  */
-svm_queue_t *
+svm_msg_q_t *
 segment_manager_alloc_queue (svm_fifo_segment_private_t * segment,
 			     u32 queue_size)
 {
-  ssvm_shared_header_t *sh;
-  svm_queue_t *q;
+  u32 fifo_evt_size, session_evt_size = 256, notif_q_size;
+  svm_msg_q_cfg_t _cfg, *cfg = &_cfg;
+  svm_msg_q_t *q;
   void *oldheap;
 
-  sh = segment->ssvm.sh;
+  fifo_evt_size = sizeof (session_fifo_event_t);
+  notif_q_size = clib_max (16, queue_size >> 4);
+  /* *INDENT-OFF* */
+  svm_msg_q_ring_cfg_t rc[SESSION_MQ_N_RINGS] = {
+    {queue_size, fifo_evt_size, 0},
+    {notif_q_size, session_evt_size, 0}
+  };
+  /* *INDENT-ON* */
+  cfg->consumer_pid = 0;
+  cfg->n_rings = 2;
+  cfg->q_nitems = queue_size;
+  cfg->ring_cfgs = rc;
 
-  oldheap = ssvm_push_heap (sh);
-  q = svm_queue_init (queue_size, sizeof (session_fifo_event_t),
-		      0 /* consumer pid */ ,
-		      0 /* signal when queue non-empty */ );
+  oldheap = ssvm_push_heap (segment->ssvm.sh);
+  q = svm_msg_q_alloc (cfg);
   ssvm_pop_heap (oldheap);
   return q;
 }