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authorFlorin Coras <fcoras@cisco.com>2019-07-20 15:53:16 -0700
committerDave Wallace <dwallacelf@gmail.com>2019-07-23 17:37:30 +0000
commit60183db3a8b25714539882cca05ba3b9e9e54489 (patch)
tree401b275c491a43a061076f74afc4878c2b0e1de9 /src
parent687c9021fda009caa2b7eb17bea2eaa51d275bde (diff)
session: reorganize dispatch logic
Type:refactor Change-Id: Id796d0103e61e15c35a586d8cbd3d8916487b84d Signed-off-by: Florin Coras <fcoras@cisco.com>
Diffstat (limited to 'src')
-rw-r--r--src/vnet/session/session.c4
-rw-r--r--src/vnet/session/session.h29
-rw-r--r--src/vnet/session/session_node.c261
3 files changed, 141 insertions, 153 deletions
diff --git a/src/vnet/session/session.c b/src/vnet/session/session.c
index 4e340687041..ea1a8c9fc5e 100644
--- a/src/vnet/session/session.c
+++ b/src/vnet/session/session.c
@@ -1377,12 +1377,12 @@ session_manager_main_enable (vlib_main_t * vm)
{
wrk = &smm->wrk[i];
wrk->new_head = clib_llist_make_head (wrk->event_elts, evt_list);
- wrk->pending_head = clib_llist_make_head (wrk->event_elts, evt_list);
+ wrk->old_head = clib_llist_make_head (wrk->event_elts, evt_list);
wrk->postponed_head = clib_llist_make_head (wrk->event_elts, evt_list);
wrk->disconnects_head = clib_llist_make_head (wrk->event_elts,
evt_list);
+ wrk->vm = vlib_mains[i];
wrk->last_vlib_time = vlib_time_now (vlib_mains[i]);
- wrk->dispatch_period = 500e-6;
if (num_threads > 1)
clib_rwlock_init (&smm->wrk[i].peekers_rw_locks);
diff --git a/src/vnet/session/session.h b/src/vnet/session/session.h
index 1e3229171da..a3f2a01929b 100644
--- a/src/vnet/session/session.h
+++ b/src/vnet/session/session.h
@@ -78,12 +78,12 @@ typedef struct session_worker_
/** vpp event message queue for worker */
svm_msg_q_t *vpp_event_queue;
- /** Our approximation of a "complete" dispatch loop period */
- f64 dispatch_period;
-
/** vlib_time_now last time around the track */
f64 last_vlib_time;
+ /** Convenience pointer to this worker's vlib_main */
+ vlib_main_t *vm;
+
/** Per-proto vector of sessions to enqueue */
u32 *session_to_enqueue[TRANSPORT_N_PROTO];
@@ -100,7 +100,7 @@ typedef struct session_worker_
clib_llist_index_t new_head;
/** Head of list of pending events */
- clib_llist_index_t pending_head;
+ clib_llist_index_t old_head;
/** Head of list of postponed events */
clib_llist_index_t postponed_head;
@@ -111,18 +111,15 @@ typedef struct session_worker_
/** Peekers rw lock */
clib_rwlock_t peekers_rw_locks;
- u32 last_tx_packets;
-
#if SESSION_DEBUG
/** last event poll time by thread */
f64 last_event_poll;
#endif
} session_worker_t;
-typedef int (session_fifo_rx_fn) (vlib_main_t * vm,
+typedef int (session_fifo_rx_fn) (session_worker_t * wrk,
vlib_node_runtime_t * node,
- session_worker_t * wrk,
- session_evt_elt_t * e, int *n_tx_pkts);
+ session_evt_elt_t * e, int *n_tx_packets);
extern session_fifo_rx_fn session_tx_fifo_peek_and_snd;
extern session_fifo_rx_fn session_tx_fifo_dequeue_and_snd;
@@ -207,9 +204,9 @@ session_evt_elt_free (session_worker_t * wrk, session_evt_elt_t * elt)
}
static inline session_evt_elt_t *
-session_evt_pending_head (session_worker_t * wrk)
+session_evt_old_head (session_worker_t * wrk)
{
- return pool_elt_at_index (wrk->event_elts, wrk->pending_head);
+ return pool_elt_at_index (wrk->event_elts, wrk->old_head);
}
static inline session_evt_elt_t *
@@ -225,10 +222,10 @@ session_evt_pending_disconnects_head (session_worker_t * wrk)
}
static inline void
-session_evt_add_pending (session_worker_t * wrk, session_evt_elt_t * elt)
+session_evt_add_old (session_worker_t * wrk, session_evt_elt_t * elt)
{
clib_llist_add_tail (wrk->event_elts, evt_list, elt,
- session_evt_pending_head (wrk));
+ session_evt_old_head (wrk));
}
static inline void
@@ -478,12 +475,6 @@ transport_rx_fifo_has_ooo_data (transport_connection_t * tc)
}
always_inline f64
-transport_dispatch_period (u32 thread_index)
-{
- return session_main.wrk[thread_index].dispatch_period;
-}
-
-always_inline f64
transport_time_now (u32 thread_index)
{
return session_main.wrk[thread_index].last_vlib_time;
diff --git a/src/vnet/session/session_node.c b/src/vnet/session/session_node.c
index bfe7702388c..999776f02bd 100644
--- a/src/vnet/session/session_node.c
+++ b/src/vnet/session/session_node.c
@@ -613,16 +613,17 @@ session_tx_set_dequeue_params (vlib_main_t * vm, session_tx_context_t * ctx,
}
always_inline int
-session_tx_fifo_read_and_snd_i (vlib_main_t * vm, vlib_node_runtime_t * node,
- session_worker_t * wrk,
- session_evt_elt_t * elt, int *n_tx_packets,
- u8 peek_data)
+session_tx_fifo_read_and_snd_i (session_worker_t * wrk,
+ vlib_node_runtime_t * node,
+ session_evt_elt_t * elt,
+ int *n_tx_packets, u8 peek_data)
{
- u32 next_index, next0, next1, *to_next, n_left_to_next, n_left, pbi;
- u32 n_trace = vlib_get_trace_count (vm, node), n_bufs_needed = 0;
- session_main_t *smm = &session_main;
+ u32 next_index, next0, next1, *to_next, n_left_to_next;
+ u32 n_trace, n_bufs_needed = 0, n_left, pbi;
session_tx_context_t *ctx = &wrk->ctx;
+ session_main_t *smm = &session_main;
session_event_t *e = &elt->evt;
+ vlib_main_t *vm = wrk->vm;
transport_proto_t tp;
vlib_buffer_t *pb;
u16 n_bufs, rv;
@@ -630,7 +631,7 @@ session_tx_fifo_read_and_snd_i (vlib_main_t * vm, vlib_node_runtime_t * node,
if (PREDICT_FALSE ((rv = session_tx_not_ready (ctx->s, peek_data))))
{
if (rv < 2)
- session_evt_add_pending (wrk, elt);
+ session_evt_add_old (wrk, elt);
return SESSION_TX_NO_DATA;
}
@@ -649,12 +650,13 @@ session_tx_fifo_read_and_snd_i (vlib_main_t * vm, vlib_node_runtime_t * node,
}
ctx->snd_space = transport_connection_snd_space (ctx->tc,
- vm->clib_time.
+ wrk->vm->clib_time.
last_cpu_time,
ctx->snd_mss);
+
if (ctx->snd_space == 0 || ctx->snd_mss == 0)
{
- session_evt_add_pending (wrk, elt);
+ session_evt_add_old (wrk, elt);
return SESSION_TX_NO_DATA;
}
@@ -676,7 +678,7 @@ session_tx_fifo_read_and_snd_i (vlib_main_t * vm, vlib_node_runtime_t * node,
{
if (n_bufs)
vlib_buffer_free (vm, wrk->tx_buffers, n_bufs);
- session_evt_add_pending (wrk, elt);
+ session_evt_add_old (wrk, elt);
return SESSION_TX_NO_BUFFERS;
}
@@ -757,13 +759,13 @@ session_tx_fifo_read_and_snd_i (vlib_main_t * vm, vlib_node_runtime_t * node,
n_left_to_next, bi0, next0);
}
- if (PREDICT_FALSE (n_trace > 0))
+ if (PREDICT_FALSE ((n_trace = vlib_get_trace_count (vm, node)) > 0))
session_tx_trace_frame (vm, node, next_index, to_next,
ctx->n_segs_per_evt, ctx->s, n_trace);
+
if (PREDICT_FALSE (n_bufs))
- {
- vlib_buffer_free (vm, wrk->tx_buffers, n_bufs);
- }
+ vlib_buffer_free (vm, wrk->tx_buffers, n_bufs);
+
*n_tx_packets += ctx->n_segs_per_evt;
transport_connection_update_tx_stats (ctx->tc, ctx->max_len_to_snd);
vlib_put_next_frame (vm, node, next_index, n_left_to_next);
@@ -775,7 +777,7 @@ session_tx_fifo_read_and_snd_i (vlib_main_t * vm, vlib_node_runtime_t * node,
ASSERT (ctx->left_to_snd == 0);
if (ctx->max_len_to_snd < ctx->max_dequeue)
if (svm_fifo_set_event (ctx->s->tx_fifo))
- session_evt_add_pending (wrk, elt);
+ session_evt_add_old (wrk, elt);
if (!peek_data
&& ctx->transport_vft->transport_options.tx_type == TRANSPORT_TX_DGRAM)
@@ -787,7 +789,7 @@ session_tx_fifo_read_and_snd_i (vlib_main_t * vm, vlib_node_runtime_t * node,
/* More data needs to be read */
else if (svm_fifo_max_dequeue_cons (ctx->s->tx_fifo) > 0)
if (svm_fifo_set_event (ctx->s->tx_fifo))
- session_evt_add_pending (wrk, elt);
+ session_evt_add_old (wrk, elt);
if (svm_fifo_needs_deq_ntf (ctx->s->tx_fifo, ctx->max_len_to_snd))
session_dequeue_notify (ctx->s);
@@ -796,26 +798,25 @@ session_tx_fifo_read_and_snd_i (vlib_main_t * vm, vlib_node_runtime_t * node,
}
int
-session_tx_fifo_peek_and_snd (vlib_main_t * vm, vlib_node_runtime_t * node,
- session_worker_t * wrk,
- session_evt_elt_t * e, int *n_tx_pkts)
+session_tx_fifo_peek_and_snd (session_worker_t * wrk,
+ vlib_node_runtime_t * node,
+ session_evt_elt_t * e, int *n_tx_packets)
{
- return session_tx_fifo_read_and_snd_i (vm, node, wrk, e, n_tx_pkts, 1);
+ return session_tx_fifo_read_and_snd_i (wrk, node, e, n_tx_packets, 1);
}
int
-session_tx_fifo_dequeue_and_snd (vlib_main_t * vm, vlib_node_runtime_t * node,
- session_worker_t * wrk,
- session_evt_elt_t * e, int *n_tx_pkts)
+session_tx_fifo_dequeue_and_snd (session_worker_t * wrk,
+ vlib_node_runtime_t * node,
+ session_evt_elt_t * e, int *n_tx_packets)
{
- return session_tx_fifo_read_and_snd_i (vm, node, wrk, e, n_tx_pkts, 0);
+ return session_tx_fifo_read_and_snd_i (wrk, node, e, n_tx_packets, 0);
}
int
-session_tx_fifo_dequeue_internal (vlib_main_t * vm,
+session_tx_fifo_dequeue_internal (session_worker_t * wrk,
vlib_node_runtime_t * node,
- session_worker_t * wrk,
- session_evt_elt_t * e, int *n_tx_pkts)
+ session_evt_elt_t * e, int *n_tx_packets)
{
session_t *s = wrk->ctx.s;
@@ -831,16 +832,100 @@ session_event_get_session (session_event_t * e, u8 thread_index)
return session_get_if_valid (e->session_index, thread_index);
}
-static void
-session_update_dispatch_period (session_worker_t * wrk, f64 now,
- u32 thread_index)
+always_inline void
+session_event_dispatch (session_worker_t * wrk, vlib_node_runtime_t * node,
+ session_evt_elt_t * elt, u32 thread_index,
+ int *n_tx_packets)
{
- if (wrk->last_tx_packets)
+ session_main_t *smm = &session_main;
+ app_worker_t *app_wrk;
+ void (*fp) (void *);
+ session_event_t *e;
+ session_t *s;
+ int rv;
+
+ e = &elt->evt;
+ switch (e->event_type)
{
- f64 sample = now - wrk->last_vlib_time;
- wrk->dispatch_period = (wrk->dispatch_period + sample) * 0.5;
+ case SESSION_IO_EVT_TX_FLUSH:
+ case SESSION_IO_EVT_TX:
+ /* Don't try to send more that one frame per dispatch cycle */
+ if (*n_tx_packets == VLIB_FRAME_SIZE)
+ {
+ session_evt_add_postponed (wrk, elt);
+ return;
+ }
+
+ s = session_event_get_session (e, thread_index);
+ if (PREDICT_FALSE (!s))
+ {
+ clib_warning ("session was freed!");
+ break;
+ }
+ CLIB_PREFETCH (s->tx_fifo, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
+ wrk->ctx.s = s;
+ /* Spray packets in per session type frames, since they go to
+ * different nodes */
+ rv = (smm->session_tx_fns[s->session_type]) (wrk, node, elt,
+ n_tx_packets);
+ if (PREDICT_FALSE (rv == SESSION_TX_NO_BUFFERS))
+ {
+ vlib_node_increment_counter (wrk->vm, node->node_index,
+ SESSION_QUEUE_ERROR_NO_BUFFER, 1);
+ break;
+ }
+ break;
+ case SESSION_IO_EVT_RX:
+ s = session_event_get_session (e, thread_index);
+ if (!s)
+ break;
+ transport_app_rx_evt (session_get_transport_proto (s),
+ s->connection_index, s->thread_index);
+ break;
+ case SESSION_CTRL_EVT_CLOSE:
+ s = session_get_from_handle_if_valid (e->session_handle);
+ if (PREDICT_FALSE (!s))
+ break;
+ session_transport_close (s);
+ break;
+ case SESSION_IO_EVT_BUILTIN_RX:
+ s = session_event_get_session (e, thread_index);
+ if (PREDICT_FALSE (!s || s->session_state >= SESSION_STATE_CLOSING))
+ break;
+ svm_fifo_unset_event (s->rx_fifo);
+ app_wrk = app_worker_get (s->app_wrk_index);
+ app_worker_builtin_rx (app_wrk, s);
+ break;
+ case SESSION_IO_EVT_BUILTIN_TX:
+ s = session_get_from_handle_if_valid (e->session_handle);
+ wrk->ctx.s = s;
+ if (PREDICT_TRUE (s != 0))
+ session_tx_fifo_dequeue_internal (wrk, node, elt, n_tx_packets);
+ break;
+ case SESSION_CTRL_EVT_RPC:
+ fp = e->rpc_args.fp;
+ (*fp) (e->rpc_args.arg);
+ break;
+ case SESSION_CTRL_EVT_DISCONNECTED:
+ session_mq_disconnected_handler (e->data);
+ break;
+ case SESSION_CTRL_EVT_ACCEPTED_REPLY:
+ session_mq_accepted_reply_handler (e->data);
+ break;
+ case SESSION_CTRL_EVT_CONNECTED_REPLY:
+ break;
+ case SESSION_CTRL_EVT_DISCONNECTED_REPLY:
+ session_mq_disconnected_reply_handler (e->data);
+ break;
+ case SESSION_CTRL_EVT_RESET_REPLY:
+ session_mq_reset_reply_handler (e->data);
+ break;
+ case SESSION_CTRL_EVT_WORKER_UPDATE:
+ session_mq_worker_update_handler (e->data);
+ break;
+ default:
+ clib_warning ("unhandled event type %d", e->event_type);
}
- wrk->last_vlib_time = now;
}
static uword
@@ -850,22 +935,20 @@ session_queue_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
session_main_t *smm = vnet_get_session_main ();
u32 thread_index = vm->thread_index, n_to_dequeue;
session_worker_t *wrk = &smm->wrk[thread_index];
- session_evt_elt_t *elt, *new_he, *new_te, *pending_he;
+ session_evt_elt_t *elt, *new_he, *new_te, *old_he;
session_evt_elt_t *disconnects_he, *postponed_he;
svm_msg_q_msg_t _msg, *msg = &_msg;
- f64 now = vlib_time_now (vm);
- int n_tx_packets = 0, i, rv;
- app_worker_t *app_wrk;
+ int i, n_tx_packets = 0;
svm_msg_q_t *mq;
- void (*fp) (void *);
SESSION_EVT (SESSION_EVT_DISPATCH_START, wrk);
+ wrk->last_vlib_time = vlib_time_now (vm);
+
/*
* Update transport time
*/
- session_update_dispatch_period (wrk, now, thread_index);
- transport_update_time (now, thread_index);
+ transport_update_time (wrk->last_vlib_time, thread_index);
/* Make sure postponed events are handled first */
new_he = pool_elt_at_index (wrk->event_elts, wrk->new_head);
@@ -896,106 +979,22 @@ session_queue_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
svm_msg_q_unlock (mq);
}
- pending_he = pool_elt_at_index (wrk->event_elts, wrk->pending_head);
- postponed_he = pool_elt_at_index (wrk->event_elts, wrk->postponed_head);
+ old_he = pool_elt_at_index (wrk->event_elts, wrk->old_head);
disconnects_he = pool_elt_at_index (wrk->event_elts, wrk->disconnects_head);
new_te = clib_llist_prev (wrk->event_elts, evt_list, new_he);
- clib_llist_splice (wrk->event_elts, evt_list, new_te, pending_he);
+ clib_llist_splice (wrk->event_elts, evt_list, new_te, old_he);
new_te = clib_llist_prev (wrk->event_elts, evt_list, new_he);
clib_llist_splice (wrk->event_elts, evt_list, new_te, disconnects_he);
while (!clib_llist_is_empty (wrk->event_elts, evt_list, new_he))
{
clib_llist_index_t ei;
- session_event_t *e;
- session_t *s;
clib_llist_pop_first (wrk->event_elts, evt_list, elt, new_he);
ei = clib_llist_entry_index (wrk->event_elts, elt);
- e = &elt->evt;
- switch (e->event_type)
- {
- case SESSION_IO_EVT_TX_FLUSH:
- case SESSION_IO_EVT_TX:
- /* Don't try to send more that one frame per dispatch cycle */
- if (n_tx_packets == VLIB_FRAME_SIZE)
- {
- session_evt_add_postponed (wrk, elt);
- continue;
- }
- s = session_event_get_session (e, thread_index);
- if (PREDICT_FALSE (!s))
- {
- clib_warning ("session was freed!");
- break;
- }
- CLIB_PREFETCH (s->tx_fifo, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
- wrk->ctx.s = s;
- /* Spray packets in per session type frames, since they go to
- * different nodes */
- rv = (smm->session_tx_fns[s->session_type]) (vm, node, wrk, elt,
- &n_tx_packets);
- if (PREDICT_FALSE (rv == SESSION_TX_NO_BUFFERS))
- {
- vlib_node_increment_counter (vm, node->node_index,
- SESSION_QUEUE_ERROR_NO_BUFFER, 1);
- break;
- }
- break;
- case SESSION_IO_EVT_RX:
- s = session_event_get_session (e, thread_index);
- if (!s)
- break;
- transport_app_rx_evt (session_get_transport_proto (s),
- s->connection_index, s->thread_index);
- break;
- case SESSION_CTRL_EVT_CLOSE:
- s = session_get_from_handle_if_valid (e->session_handle);
- if (PREDICT_FALSE (!s))
- break;
- session_transport_close (s);
- break;
- case SESSION_IO_EVT_BUILTIN_RX:
- s = session_event_get_session (e, thread_index);
- if (PREDICT_FALSE (!s || s->session_state >= SESSION_STATE_CLOSING))
- break;
- svm_fifo_unset_event (s->rx_fifo);
- app_wrk = app_worker_get (s->app_wrk_index);
- app_worker_builtin_rx (app_wrk, s);
- break;
- case SESSION_IO_EVT_BUILTIN_TX:
- s = session_get_from_handle_if_valid (e->session_handle);
- wrk->ctx.s = s;
- if (PREDICT_TRUE (s != 0))
- session_tx_fifo_dequeue_internal (vm, node, wrk, elt,
- &n_tx_packets);
- break;
- case SESSION_CTRL_EVT_RPC:
- fp = e->rpc_args.fp;
- (*fp) (e->rpc_args.arg);
- break;
- case SESSION_CTRL_EVT_DISCONNECTED:
- session_mq_disconnected_handler (e->data);
- break;
- case SESSION_CTRL_EVT_ACCEPTED_REPLY:
- session_mq_accepted_reply_handler (e->data);
- break;
- case SESSION_CTRL_EVT_CONNECTED_REPLY:
- break;
- case SESSION_CTRL_EVT_DISCONNECTED_REPLY:
- session_mq_disconnected_reply_handler (e->data);
- break;
- case SESSION_CTRL_EVT_RESET_REPLY:
- session_mq_reset_reply_handler (e->data);
- break;
- case SESSION_CTRL_EVT_WORKER_UPDATE:
- session_mq_worker_update_handler (e->data);
- break;
- default:
- clib_warning ("unhandled event type %d", e->event_type);
- }
+ session_event_dispatch (wrk, node, elt, thread_index, &n_tx_packets);
/* Regrab elements in case pool moved */
elt = pool_elt_at_index (wrk->event_elts, ei);
@@ -1005,8 +1004,6 @@ session_queue_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
new_he = pool_elt_at_index (wrk->event_elts, wrk->new_head);
}
- wrk->last_tx_packets = n_tx_packets;
-
vlib_node_increment_counter (vm, session_queue_node.index,
SESSION_QUEUE_ERROR_TX, n_tx_packets);
@@ -1154,7 +1151,7 @@ session_node_lookup_fifo_event (svm_fifo_t * f, session_event_t * e)
/* *INDENT-OFF* */
clib_llist_foreach (wrk->event_elts, evt_list,
- session_evt_pending_head (wrk), elt, ({
+ session_evt_old_head (wrk), elt, ({
found = session_node_cmp_event (&elt->evt, f);
if (found)
{