session: async rx event notifications
Move from synchronous flushing of io and ctrl events from transports to
applications to an async model via a new session_input input node that
runs in interrupt mode. Events are coalesced per application worker.
On the one hand, this helps by minimizing message queue locking churn.
And on the other, it opens the possibility for further optimizations of
event message generation, obviates need for rx rescheduling rpcs and is
a first step towards a fully async data/io rx path.
Type: improvement
Signed-off-by: Florin Coras <fcoras@cisco.com>
Change-Id: Id6bebcb65fc9feef8aa02ddf1af6d9ba6f6745ce
diff --git a/src/vnet/session/application.c b/src/vnet/session/application.c
index cf867401..fdd5a0a 100644
--- a/src/vnet/session/application.c
+++ b/src/vnet/session/application.c
@@ -725,6 +725,12 @@
return pool_elt_at_index (app_main.app_pool, app_index);
}
+static int
+_null_app_tx_callback (session_t *s)
+{
+ return 0;
+}
+
static void
application_verify_cb_fns (session_cb_vft_t * cb_fns)
{
@@ -736,6 +742,8 @@
clib_warning ("No session disconnect callback function provided");
if (cb_fns->session_reset_callback == 0)
clib_warning ("No session reset callback function provided");
+ if (!cb_fns->builtin_app_tx_callback)
+ cb_fns->builtin_app_tx_callback = _null_app_tx_callback;
}
/**