svm session vcl: per app rx message queues

Add option to use per app private segments for app to vpp message
queues, as opposed to exposing internal message queues segment.

When so configured, internal message queues are still polled by the
session queue node but external app message queues are handled by a new
input node (appsl-rx-mqs-input) that runs in interrupt state. Signaling
of the node, when mqs receive new messages, is done through eventfds
epolled by worker epoll input nodes.

Type: feature

Signed-off-by: Florin Coras <fcoras@cisco.com>
Change-Id: Iffe8ce5a9944a56a14e6d0f492a850cb9e392d16

1 files changed, 5 insertions, 0 deletions

diff --git a/src/vnet/session/session.h b/src/vnet/session/session.h
index e8afcd03d69..aba8a1c3fd1 100644
--- a/src/vnet/session/session.h
+++ b/src/vnet/session/session.h
@@ -174,6 +174,9 @@ typedef struct session_main_
   /** Poll session node in main thread */
   u8 poll_main;
 
+  /** Allocate private rx mqs for external apps */
+  u8 use_private_rx_mqs;
+
   /** vpp fifo event queue configured length */
   u32 configured_event_queue_length;
 
@@ -296,6 +299,8 @@ session_evt_alloc_old (session_worker_t * wrk)
   return elt;
 }
 
+int session_wrk_handle_mq (session_worker_t *wrk, svm_msg_q_t *mq);
+
 session_t *session_alloc (u32 thread_index);
 void session_free (session_t * s);
 void session_free_w_fifos (session_t * s);