* limitations under the License.
*/
+#include <math.h>
#include <vlib/vlib.h>
#include <vnet/vnet.h>
-#include <vnet/pg/pg.h>
-#include <vnet/ip/ip.h>
-
#include <vnet/tcp/tcp.h>
-
-#include <vppinfra/hash.h>
-#include <vppinfra/error.h>
#include <vppinfra/elog.h>
+#include <vnet/session/application.h>
+#include <vnet/session/session_debug.h>
#include <vlibmemory/unix_shared_memory_queue.h>
-#include <vnet/udp/udp_packet.h>
-#include <vnet/lisp-cp/packets.h>
-#include <math.h>
-
vlib_node_registration_t session_queue_node;
typedef struct
vlib_node_registration_t session_queue_node;
-#define foreach_session_queue_error \
-_(TX, "Packets transmitted") \
+#define foreach_session_queue_error \
+_(TX, "Packets transmitted") \
_(TIMER, "Timer events")
typedef enum
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;
- 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;
+ 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 || svm_fifo_max_dequeue (s0->server_tx_fifo) == 0
- || snd_mss0 == 0)
+ if (snd_space0 == 0 || snd_mss0 == 0)
{
vec_add1 (smm->evts_partially_read[thread_index], *e0);
return 0;
}
- ASSERT (e0->enqueue_length > 0);
-
- /* Ensure we're not writing more than transport window allows */
- max_len_to_snd0 = clib_min (e0->enqueue_length, snd_space0);
-
if (peek_data)
{
/* Offset in rx fifo from where to peek data */
rx_offset = transport_vft->tx_fifo_offset (tc0);
}
- /* TODO check if transport is willing to send len_to_snd0
- * bytes (Nagle) */
+ /* Check how much we can pull. If buffering, subtract the offset */
+ max_dequeue0 = svm_fifo_max_dequeue (s0->server_tx_fifo) - rx_offset;
- n_frame_bytes = snd_mss0 * VLIB_FRAME_SIZE;
- n_frames_per_evt = ceil ((double) max_len_to_snd0 / n_frame_bytes);
+ /* Allow enqueuing of a new event */
+ svm_fifo_unset_event (s0->server_tx_fifo);
+
+ /* Nothing to read return */
+ if (max_dequeue0 == 0)
+ return 0;
+
+ /* Ensure we're not writing more than transport window allows */
+ 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;
+ }
+
+ 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);
+
+ 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 */
if (PREDICT_FALSE (n_bufs < 0.9 * VLIB_FRAME_SIZE))
{
- /* Keep track of how much we've dequeued and exit */
- if (left_to_snd0 != max_len_to_snd0)
+ if (svm_fifo_set_event (s0->server_tx_fifo))
{
- e0->enqueue_length -= max_len_to_snd0 - left_to_snd0;
vec_add1 (smm->evts_partially_read[thread_index], *e0);
}
-
return -1;
}
}
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;
+ len_to_deq0 = clib_min (left_to_snd0, deq_per_buf);
+
+ data0 = vlib_buffer_make_headroom (b0, MAX_HDRS_LEN);
+ if (peek_data)
+ {
+ 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,
+ len_to_deq0, data0);
+ }
+
+ if (n_bytes_read <= 0)
+ goto dequeue_fail;
+
+ 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;
t0->server_thread_index = s0->thread_index;
}
- len_to_deq0 = (left_to_snd0 < snd_mss0) ? left_to_snd0 : snd_mss0;
-
- /* *INDENT-OFF* */
- if (1)
- {
- ELOG_TYPE_DECLARE (e) = {
- .format = "evt-deq: id %d len %d rd %d wnd %d",
- .format_args = "i4i4i4i4",
- };
- struct
- {
- u32 data[4];
- } *ed;
- ed = ELOG_DATA (&vm->elog_main, e);
- ed->data[0] = e0->event_id;
- ed->data[1] = e0->enqueue_length;
- ed->data[2] = len_to_deq0;
- ed->data[3] = left_to_snd0;
- }
- /* *INDENT-ON* */
-
- /* 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)
- {
- int n_bytes_read;
- 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;
-
- /* Keep track of progress locally, transport is also supposed to
- * increment it independently when pushing header */
- rx_offset += n_bytes_read;
- }
- else
- {
- if (svm_fifo_dequeue_nowait (s0->server_tx_fifo, s0->pid,
- len_to_deq0, data0) < 0)
- goto dequeue_fail;
- }
-
- b0->current_length = len_to_deq0;
-
- /* Ask transport to push header */
- transport_vft->push_header (tc0, b0);
-
- left_to_snd0 -= len_to_deq0;
- *n_tx_packets = *n_tx_packets + 1;
-
vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
to_next, n_left_to_next,
bi0, next0);
vlib_put_next_frame (vm, node, next_index, n_left_to_next);
}
- /* If we couldn't dequeue all bytes store progress */
- if (max_len_to_snd0 < e0->enqueue_length)
+ /* If we couldn't dequeue all bytes mark as partially read */
+ if (max_len_to_snd0 < max_dequeue0)
{
- e0->enqueue_length -= max_len_to_snd0;
- vec_add1 (smm->evts_partially_read[thread_index], *e0);
+ /* If we don't already have new event */
+ if (svm_fifo_set_event (s0->server_tx_fifo))
+ {
+ vec_add1 (smm->evts_partially_read[thread_index], *e0);
+ }
}
return 0;
dequeue_fail:
- /* Can't read from fifo. Store event rx progress, save as partially read,
- * return buff to free list and return */
- e0->enqueue_length -= max_len_to_snd0 - left_to_snd0;
- vec_add1 (smm->evts_partially_read[thread_index], *e0);
+ /*
+ * Can't read from fifo. If we don't already have an event, save as partially
+ * read, return buff to free list and return
+ */
+ clib_warning ("dequeue fail");
- to_next -= 1;
- n_left_to_next += 1;
+ if (svm_fifo_set_event (s0->server_tx_fifo))
+ {
+ vec_add1 (smm->evts_partially_read[thread_index], *e0);
+ }
+ vlib_put_next_frame (vm, node, next_index, n_left_to_next + 1);
_vec_len (smm->tx_buffers[thread_index]) += 1;
- clib_warning ("dequeue fail");
return 0;
}
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;
+
+ /* $$$ add multiple event queues, per vpp worker thread */
+ ASSERT (f0->master_thread_index == thread_index);
+
+ s0 = stream_session_get_if_valid (session_index0, thread_index);
+
+ ASSERT (s0->thread_index == thread_index);
+
+ return s0;
+}
+
static uword
session_queue_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
vlib_frame_t * frame)
session_fifo_event_t *my_fifo_events, *e;
u32 n_to_dequeue, n_events;
unix_shared_memory_queue_t *q;
+ application_t *app;
int n_tx_packets = 0;
- u32 my_thread_index = vm->cpu_index;
+ u32 my_thread_index = vm->thread_index;
int i, rv;
+ f64 now = vlib_time_now (vm);
+
+ SESSION_EVT_DBG (SESSION_EVT_POLL_GAP_TRACK, smm, my_thread_index);
/*
* Update TCP time
*/
- tcp_update_time (vlib_time_now (vm), my_thread_index);
+ tcp_update_time (now, my_thread_index);
/*
* Get vpp queue events
if (n_to_dequeue == 0 && vec_len (my_fifo_events) == 0)
return 0;
+ SESSION_EVT_DBG (SESSION_EVT_DEQ_NODE, 0);
+
/*
* If we didn't manage to process previous events try going
* over them again without dequeuing new ones.
*/
/* XXX: Block senders to sessions that can't keep up */
if (vec_len (my_fifo_events) >= 100)
- goto skip_dequeue;
+ {
+ clib_warning ("too many fifo events unsolved");
+ goto skip_dequeue;
+ }
/* See you in the next life, don't be late */
if (pthread_mutex_trylock (&q->mutex))
n_events = vec_len (my_fifo_events);
for (i = 0; i < n_events; i++)
{
- svm_fifo_t *f0; /* $$$ prefetch 1 ahead maybe */
- stream_session_t *s0;
- u32 server_session_index0, server_thread_index0;
+ stream_session_t *s0; /* $$$ prefetch 1 ahead maybe */
session_fifo_event_t *e0;
e0 = &my_fifo_events[i];
- f0 = e0->fifo;
- server_session_index0 = f0->server_session_index;
- server_thread_index0 = f0->server_thread_index;
-
- /* $$$ add multiple event queues, per vpp worker thread */
- ASSERT (server_thread_index0 == my_thread_index);
-
- s0 = stream_session_get_if_valid (server_session_index0,
- my_thread_index);
- if (CLIB_DEBUG && !s0)
+ switch (e0->event_type)
{
- clib_warning ("It's dead, Jim!");
- continue;
- }
+ case FIFO_EVENT_APP_TX:
+ s0 = session_event_get_session (e0, my_thread_index);
- if (PREDICT_FALSE (s0->session_state == SESSION_STATE_CLOSED))
- continue;
-
- 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_rx_fns[s0->session_type]) (vm, node, smm, e0, s0,
+ rv = (smm->session_tx_fns[s0->session_type]) (vm, node, smm, e0, s0,
my_thread_index,
&n_tx_packets);
+ /* Out of buffers */
if (rv < 0)
goto done;
break;
-
+ 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);
+ app->cb_fns.builtin_server_rx_callback (s0);
+ break;
default:
clib_warning ("unhandled event type %d", e0->event_type);
}
vlib_node_increment_counter (vm, session_queue_node.index,
SESSION_QUEUE_ERROR_TX, n_tx_packets);
+ SESSION_EVT_DBG (SESSION_EVT_DEQ_NODE, 1);
+
return n_tx_packets;
}
Code Review / vpp.git / blobdiff