SESSION_QUEUE_NEXT_IP6_LOOKUP,
};
+always_inline void
+session_tx_fifo_chain_tail (session_manager_main_t * smm, vlib_main_t * vm,
+ u8 thread_index, svm_fifo_t * fifo,
+ vlib_buffer_t * b0, u32 bi0, u8 n_bufs_per_seg,
+ u32 * left_to_snd0, u16 * n_bufs, u32 * rx_offset,
+ u16 deq_per_buf, u8 peek_data)
+{
+ vlib_buffer_t *chain_b0, *prev_b0;
+ u32 chain_bi0;
+ u16 len_to_deq0, n_bytes_read;
+ u8 *data0, j;
+
+ chain_bi0 = bi0;
+ chain_b0 = b0;
+ for (j = 1; j < n_bufs_per_seg; j++)
+ {
+ prev_b0 = chain_b0;
+ len_to_deq0 = clib_min (*left_to_snd0, deq_per_buf);
+
+ *n_bufs -= 1;
+ chain_bi0 = smm->tx_buffers[thread_index][*n_bufs];
+ _vec_len (smm->tx_buffers[thread_index]) = *n_bufs;
+
+ chain_b0 = vlib_get_buffer (vm, chain_bi0);
+ chain_b0->current_data = 0;
+ data0 = vlib_buffer_get_current (chain_b0);
+ if (peek_data)
+ {
+ n_bytes_read = svm_fifo_peek (fifo, *rx_offset, len_to_deq0, data0);
+ *rx_offset += n_bytes_read;
+ }
+ else
+ {
+ n_bytes_read = svm_fifo_dequeue_nowait (fifo, len_to_deq0, data0);
+ }
+ ASSERT (n_bytes_read == len_to_deq0);
+ chain_b0->current_length = n_bytes_read;
+ b0->total_length_not_including_first_buffer += chain_b0->current_length;
+
+ /* update previous buffer */
+ prev_b0->next_buffer = chain_bi0;
+ prev_b0->flags |= VLIB_BUFFER_NEXT_PRESENT;
+
+ /* update current buffer */
+ chain_b0->next_buffer = 0;
+
+ *left_to_snd0 -= n_bytes_read;
+ if (*left_to_snd0 == 0)
+ break;
+ }
+}
+
always_inline int
session_tx_fifo_read_and_snd_i (vlib_main_t * vm, vlib_node_runtime_t * node,
session_manager_main_t * smm,
int *n_tx_packets, u8 peek_data)
{
u32 n_trace = vlib_get_trace_count (vm, node);
- u32 left_to_snd0, max_len_to_snd0, len_to_deq0, n_bufs, snd_space0;
- u32 n_frame_bytes, n_frames_per_evt;
+ u32 left_to_snd0, max_len_to_snd0, len_to_deq0, snd_space0;
+ u32 n_bufs_per_evt, n_frames_per_evt;
transport_connection_t *tc0;
transport_proto_vft_t *transport_vft;
u32 next_index, next0, *to_next, n_left_to_next, bi0;
vlib_buffer_t *b0;
- u32 rx_offset = 0, max_dequeue0;
- u16 snd_mss0;
+ u32 rx_offset = 0, max_dequeue0, n_bytes_per_seg;
+ u16 snd_mss0, n_bufs_per_seg, n_bufs;
u8 *data0;
int i, n_bytes_read;
+ u32 n_bytes_per_buf, deq_per_buf;
next_index = next0 = session_type_to_next[s0->session_type];
tc0 = transport_vft->get_connection (s0->connection_index, thread_index);
/* Make sure we have space to send and there's something to dequeue */
- snd_space0 = transport_vft->send_space (tc0);
snd_mss0 = transport_vft->send_mss (tc0);
+ snd_space0 = transport_vft->send_space (tc0);
/* Can't make any progress */
if (snd_space0 == 0 || snd_mss0 == 0)
/* Nothing to read return */
if (max_dequeue0 == 0)
- {
- return 0;
- }
+ return 0;
/* Ensure we're not writing more than transport window allows */
- max_len_to_snd0 = clib_min (max_dequeue0, snd_space0);
+ if (max_dequeue0 < snd_space0)
+ {
+ /* Constrained by tx queue. Try to send only fully formed segments */
+ max_len_to_snd0 = (max_dequeue0 > snd_mss0) ?
+ max_dequeue0 - max_dequeue0 % snd_mss0 : max_dequeue0;
+ /* TODO Nagle ? */
+ }
+ else
+ {
+ max_len_to_snd0 = snd_space0;
+ }
- /* TODO check if transport is willing to send len_to_snd0
- * bytes (Nagle) */
+ n_bytes_per_buf = vlib_buffer_free_list_buffer_size (vm,
+ VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
+ n_bytes_per_seg = MAX_HDRS_LEN + snd_mss0;
+ n_bufs_per_seg = ceil ((double) n_bytes_per_seg / n_bytes_per_buf);
+ n_bufs_per_evt = (ceil ((double) max_len_to_snd0 / n_bytes_per_seg))
+ * n_bufs_per_seg;
+ n_frames_per_evt = ceil ((double) n_bufs_per_evt / VLIB_FRAME_SIZE);
- n_frame_bytes = snd_mss0 * VLIB_FRAME_SIZE;
- n_frames_per_evt = ceil ((double) max_len_to_snd0 / n_frame_bytes);
+ deq_per_buf = clib_min (snd_mss0, n_bytes_per_buf);
n_bufs = vec_len (smm->tx_buffers[thread_index]);
left_to_snd0 = max_len_to_snd0;
{
vec_validate (smm->tx_buffers[thread_index],
n_bufs + VLIB_FRAME_SIZE - 1);
- n_bufs +=
- vlib_buffer_alloc (vm, &smm->tx_buffers[thread_index][n_bufs],
- VLIB_FRAME_SIZE);
+ n_bufs += vlib_buffer_alloc (vm,
+ &smm->tx_buffers[thread_index][n_bufs],
+ VLIB_FRAME_SIZE);
/* buffer shortage
* XXX 0.9 because when debugging we might not get a full frame */
}
vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
- while (left_to_snd0 && n_left_to_next)
+ while (left_to_snd0 && n_left_to_next >= n_bufs_per_seg)
{
+ /*
+ * Handle first buffer in chain separately
+ */
+
/* Get free buffer */
- n_bufs--;
- bi0 = smm->tx_buffers[thread_index][n_bufs];
+ bi0 = smm->tx_buffers[thread_index][--n_bufs];
_vec_len (smm->tx_buffers[thread_index]) = n_bufs;
b0 = vlib_get_buffer (vm, bi0);
b0->flags = VLIB_BUFFER_TOTAL_LENGTH_VALID
| VNET_BUFFER_LOCALLY_ORIGINATED;
b0->current_data = 0;
+ b0->total_length_not_including_first_buffer = 0;
/* RX on the local interface. tx in default fib */
vnet_buffer (b0)->sw_if_index[VLIB_RX] = 0;
vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
- /* usual speculation, or the enqueue_x1 macro will barf */
- to_next[0] = bi0;
- to_next += 1;
- n_left_to_next -= 1;
-
- VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b0);
- if (PREDICT_FALSE (n_trace > 0))
- {
- session_queue_trace_t *t0;
- vlib_trace_buffer (vm, node, next_index, b0,
- 1 /* follow_chain */ );
- vlib_set_trace_count (vm, node, --n_trace);
- t0 = vlib_add_trace (vm, node, b0, sizeof (*t0));
- t0->session_index = s0->session_index;
- t0->server_thread_index = s0->thread_index;
- }
-
- len_to_deq0 = (left_to_snd0 < snd_mss0) ? left_to_snd0 : snd_mss0;
-
- /* *INDENT-OFF* */
- SESSION_EVT_DBG(SESSION_EVT_DEQ, s0, ({
- ed->data[0] = e0->event_id;
- ed->data[1] = max_dequeue0;
- ed->data[2] = len_to_deq0;
- ed->data[3] = left_to_snd0;
- }));
- /* *INDENT-ON* */
+ len_to_deq0 = clib_min (left_to_snd0, deq_per_buf);
- /* Make room for headers */
data0 = vlib_buffer_make_headroom (b0, MAX_HDRS_LEN);
-
- /* Dequeue the data
- * TODO 1) peek instead of dequeue
- * 2) buffer chains */
if (peek_data)
{
- n_bytes_read = svm_fifo_peek (s0->server_tx_fifo, s0->pid,
- rx_offset, len_to_deq0, data0);
- if (n_bytes_read <= 0)
- goto dequeue_fail;
-
+ n_bytes_read = svm_fifo_peek (s0->server_tx_fifo, rx_offset,
+ len_to_deq0, data0);
/* Keep track of progress locally, transport is also supposed to
* increment it independently when pushing the header */
rx_offset += n_bytes_read;
else
{
n_bytes_read = svm_fifo_dequeue_nowait (s0->server_tx_fifo,
- s0->pid, len_to_deq0,
- data0);
- if (n_bytes_read <= 0)
- goto dequeue_fail;
+ len_to_deq0, data0);
}
- b0->current_length = n_bytes_read;
+ if (n_bytes_read <= 0)
+ goto dequeue_fail;
- /* Ask transport to push header */
- transport_vft->push_header (tc0, b0);
+ b0->current_length = n_bytes_read;
left_to_snd0 -= n_bytes_read;
*n_tx_packets = *n_tx_packets + 1;
+ /*
+ * Fill in the remaining buffers in the chain, if any
+ */
+ if (PREDICT_FALSE (n_bufs_per_seg > 1))
+ session_tx_fifo_chain_tail (smm, vm, thread_index,
+ s0->server_tx_fifo, b0, bi0,
+ n_bufs_per_seg, &left_to_snd0,
+ &n_bufs, &rx_offset, deq_per_buf,
+ peek_data);
+
+ /* Ask transport to push header after current_length and
+ * total_length_not_including_first_buffer are updated */
+ transport_vft->push_header (tc0, b0);
+
+ /* *INDENT-OFF* */
+ SESSION_EVT_DBG(SESSION_EVT_DEQ, s0, ({
+ ed->data[0] = e0->event_id;
+ ed->data[1] = max_dequeue0;
+ ed->data[2] = len_to_deq0;
+ ed->data[3] = left_to_snd0;
+ }));
+ /* *INDENT-ON* */
+
+ /* usual speculation, or the enqueue_x1 macro will barf */
+ to_next[0] = bi0;
+ to_next += 1;
+ n_left_to_next -= 1;
+
+ VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b0);
+ if (PREDICT_FALSE (n_trace > 0))
+ {
+ session_queue_trace_t *t0;
+ vlib_trace_buffer (vm, node, next_index, b0,
+ 1 /* follow_chain */ );
+ vlib_set_trace_count (vm, node, --n_trace);
+ t0 = vlib_add_trace (vm, node, b0, sizeof (*t0));
+ t0->session_index = s0->session_index;
+ t0->server_thread_index = s0->thread_index;
+ }
+
vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
to_next, n_left_to_next,
bi0, next0);
n_tx_pkts, 0);
}
+stream_session_t *
+session_event_get_session (session_fifo_event_t * e0, u8 thread_index)
+{
+ svm_fifo_t *f0;
+ stream_session_t *s0;
+ u32 session_index0;
+
+ f0 = e0->fifo;
+ session_index0 = f0->master_session_index;
+
+ /* $$$ add multiple event queues, per vpp worker thread */
+ ASSERT (f0->master_thread_index == thread_index);
+
+ s0 = stream_session_get_if_valid (session_index0, thread_index);
+
+ ASSERT (s0->thread_index == thread_index);
+
+ return s0;
+}
+
static uword
session_queue_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
vlib_frame_t * frame)
unix_shared_memory_queue_t *q;
application_t *app;
int n_tx_packets = 0;
- u32 my_thread_index = vm->cpu_index;
+ u32 my_thread_index = vm->thread_index;
int i, rv;
+ f64 now = vlib_time_now (vm);
+
+ SESSION_EVT_DBG (SESSION_EVT_POLL_GAP_TRACK, smm, my_thread_index);
/*
* Update TCP time
*/
- tcp_update_time (vlib_time_now (vm), my_thread_index);
+ tcp_update_time (now, my_thread_index);
/*
* Get vpp queue events
n_events = vec_len (my_fifo_events);
for (i = 0; i < n_events; i++)
{
- svm_fifo_t *f0; /* $$$ prefetch 1 ahead maybe */
- stream_session_t *s0;
- u32 session_index0;
+ stream_session_t *s0; /* $$$ prefetch 1 ahead maybe */
session_fifo_event_t *e0;
e0 = &my_fifo_events[i];
- f0 = e0->fifo;
- session_index0 = f0->server_session_index;
- /* $$$ add multiple event queues, per vpp worker thread */
- ASSERT (f0->server_thread_index == my_thread_index);
-
- s0 = stream_session_get_if_valid (session_index0, my_thread_index);
-
- if (CLIB_DEBUG && !s0)
+ switch (e0->event_type)
{
- clib_warning ("It's dead, Jim!");
- continue;
- }
-
- if (PREDICT_FALSE (s0->session_state == SESSION_STATE_CLOSED))
- continue;
+ case FIFO_EVENT_APP_TX:
+ s0 = session_event_get_session (e0, my_thread_index);
- ASSERT (s0->thread_index == my_thread_index);
+ if (CLIB_DEBUG && !s0)
+ {
+ clib_warning ("It's dead, Jim!");
+ continue;
+ }
- switch (e0->event_type)
- {
- case FIFO_EVENT_SERVER_TX:
+ if (PREDICT_FALSE (s0->session_state == SESSION_STATE_CLOSED))
+ continue;
/* Spray packets in per session type frames, since they go to
* different nodes */
rv = (smm->session_tx_fns[s0->session_type]) (vm, node, smm, e0, s0,
goto done;
break;
- case FIFO_EVENT_SERVER_EXIT:
+ case FIFO_EVENT_DISCONNECT:
+ s0 = stream_session_get_from_handle (e0->session_handle);
stream_session_disconnect (s0);
break;
case FIFO_EVENT_BUILTIN_RX:
+ s0 = session_event_get_session (e0, my_thread_index);
svm_fifo_unset_event (s0->server_rx_fifo);
/* Get session's server */
app = application_get (s0->app_index);
Code Review / vpp.git / blobdiff