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authorFlorin Coras <fcoras@cisco.com>2022-12-22 15:03:44 -0800
committerDave Barach <vpp@barachs.net>2023-08-09 18:45:26 +0000
commit0242d30fc717aeacb758281dad8e5b2e56bf6709 (patch)
treeeb7addb00bbe78061fa58442a6e9bdbd7f3e181c /src/vnet/session/session_node.c
parent6d733a93b2eb9c16196ee17d5cdc77db21589571 (diff)
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
Diffstat (limited to 'src/vnet/session/session_node.c')
-rw-r--r--src/vnet/session/session_node.c21
1 files changed, 13 insertions, 8 deletions
diff --git a/src/vnet/session/session_node.c b/src/vnet/session/session_node.c
index e15625e37ca..4f2cae4d196 100644
--- a/src/vnet/session/session_node.c
+++ b/src/vnet/session/session_node.c
@@ -142,10 +142,14 @@ session_mq_listen_handler (session_worker_t *wrk, session_evt_elt_t *elt)
session_worker_stat_error_inc (wrk, rv, 1);
app_wrk = application_get_worker (app, mp->wrk_index);
- mq_send_session_bound_cb (app_wrk->wrk_index, mp->context, a->handle, rv);
+ app_worker_listened_notify (app_wrk, a->handle, mp->context, rv);
if (mp->ext_config)
session_mq_free_ext_config (app, mp->ext_config);
+
+ /* Make sure events are flushed before releasing barrier, to avoid
+ * potential race with accept. */
+ app_wrk_flush_wrk_events (app_wrk, 0);
}
static void
@@ -170,7 +174,8 @@ session_mq_listen_uri_handler (session_worker_t *wrk, session_evt_elt_t *elt)
rv = vnet_bind_uri (a);
app_wrk = application_get_worker (app, 0);
- mq_send_session_bound_cb (app_wrk->wrk_index, mp->context, a->handle, rv);
+ app_worker_listened_notify (app_wrk, a->handle, mp->context, rv);
+ app_wrk_flush_wrk_events (app_wrk, 0);
}
static void
@@ -215,7 +220,7 @@ session_mq_connect_one (session_connect_msg_t *mp)
wrk = session_main_get_worker (vlib_get_thread_index ());
session_worker_stat_error_inc (wrk, rv, 1);
app_wrk = application_get_worker (app, mp->wrk_index);
- mq_send_session_connected_cb (app_wrk->wrk_index, mp->context, 0, rv);
+ app_worker_connect_notify (app_wrk, 0, rv, mp->context);
}
if (mp->ext_config)
@@ -324,7 +329,7 @@ session_mq_connect_uri_handler (session_worker_t *wrk, session_evt_elt_t *elt)
{
session_worker_stat_error_inc (wrk, rv, 1);
app_wrk = application_get_worker (app, 0 /* default wrk only */ );
- mq_send_session_connected_cb (app_wrk->wrk_index, mp->context, 0, rv);
+ app_worker_connect_notify (app_wrk, 0, rv, mp->context);
}
}
@@ -410,7 +415,7 @@ session_mq_unlisten_handler (session_worker_t *wrk, session_evt_elt_t *elt)
if (!app_wrk)
return;
- mq_send_unlisten_reply (app_wrk, sh, mp->context, rv);
+ app_worker_unlisten_reply (app_wrk, sh, mp->context, rv);
}
static void
@@ -466,7 +471,7 @@ session_mq_accepted_reply_handler (session_worker_t *wrk,
session_set_state (s, SESSION_STATE_READY);
if (!svm_fifo_is_empty_prod (s->rx_fifo))
- app_worker_lock_and_send_event (app_wrk, s, SESSION_IO_EVT_RX);
+ app_worker_rx_notify (app_wrk, s);
/* Closed while waiting for app to reply. Resend disconnect */
if (old_state >= SESSION_STATE_TRANSPORT_CLOSING)
@@ -669,7 +674,7 @@ session_mq_worker_update_handler (void *data)
session_send_io_evt_to_thread (s->tx_fifo, SESSION_IO_EVT_TX);
if (s->rx_fifo && !svm_fifo_is_empty (s->rx_fifo))
- app_worker_lock_and_send_event (app_wrk, s, SESSION_IO_EVT_RX);
+ app_worker_rx_notify (app_wrk, s);
if (s->session_state >= SESSION_STATE_TRANSPORT_CLOSING)
app_worker_close_notify (app_wrk, s);
@@ -1790,7 +1795,7 @@ session_event_dispatch_io (session_worker_t * wrk, vlib_node_runtime_t * node,
break;
svm_fifo_unset_event (s->rx_fifo);
app_wrk = app_worker_get (s->app_wrk_index);
- app_worker_builtin_rx (app_wrk, s);
+ app_worker_rx_notify (app_wrk, s);
break;
case SESSION_IO_EVT_TX_MAIN:
s = session_get_if_valid (e->session_index, 0 /* main thread */);