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-rw-r--r--src/vnet/session/node.c53
1 files changed, 32 insertions, 21 deletions
diff --git a/src/vnet/session/node.c b/src/vnet/session/node.c
index 3053ccc2642..07eeae82915 100644
--- a/src/vnet/session/node.c
+++ b/src/vnet/session/node.c
@@ -47,7 +47,8 @@ vlib_node_registration_t session_queue_node;
#define foreach_session_queue_error \
_(TX, "Packets transmitted") \
-_(TIMER, "Timer events")
+_(TIMER, "Timer events") \
+_(NO_BUFFER, "Out of buffers")
typedef enum
{
@@ -141,6 +142,7 @@ session_tx_fifo_read_and_snd_i (vlib_main_t * vm, vlib_node_runtime_t * node,
u8 *data0;
int i, n_bytes_read;
u32 n_bytes_per_buf, deq_per_buf;
+ u32 buffers_allocated, buffers_allocated_this_call;
next_index = next0 = session_type_to_next[s0->session_type];
@@ -167,9 +169,6 @@ session_tx_fifo_read_and_snd_i (vlib_main_t * vm, vlib_node_runtime_t * node,
/* Check how much we can pull. If buffering, subtract the offset */
max_dequeue0 = svm_fifo_max_dequeue (s0->server_tx_fifo) - rx_offset;
- /* Allow enqueuing of a new event */
- svm_fifo_unset_event (s0->server_tx_fifo);
-
/* Nothing to read return */
if (max_dequeue0 == 0)
return 0;
@@ -187,8 +186,8 @@ session_tx_fifo_read_and_snd_i (vlib_main_t * vm, vlib_node_runtime_t * node,
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_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))
@@ -205,24 +204,33 @@ session_tx_fifo_read_and_snd_i (vlib_main_t * vm, vlib_node_runtime_t * node,
if (PREDICT_FALSE (n_bufs < VLIB_FRAME_SIZE))
{
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);
-
- /* 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))
+ n_bufs + 2 * VLIB_FRAME_SIZE - 1);
+
+ buffers_allocated = 0;
+ do
{
- if (svm_fifo_set_event (s0->server_tx_fifo))
- {
- vec_add1 (smm->pending_event_vector[thread_index], *e0);
- }
- return -1;
+ buffers_allocated_this_call =
+ vlib_buffer_alloc
+ (vm,
+ &smm->tx_buffers[thread_index][n_bufs + buffers_allocated],
+ 2 * VLIB_FRAME_SIZE - buffers_allocated);
+ buffers_allocated += buffers_allocated_this_call;
}
+ while (buffers_allocated_this_call > 0
+ && ((buffers_allocated + n_bufs < VLIB_FRAME_SIZE)));
+
+ n_bufs += buffers_allocated;
_vec_len (smm->tx_buffers[thread_index]) = n_bufs;
+
+ if (PREDICT_FALSE (n_bufs < VLIB_FRAME_SIZE))
+ {
+ vec_add1 (smm->pending_event_vector[thread_index], *e0);
+ return -1;
+ }
}
+ /* Allow enqueuing of a new event */
+ svm_fifo_unset_event (s0->server_tx_fifo);
vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
while (left_to_snd0 && n_left_to_next >= n_bufs_per_seg)
@@ -232,7 +240,9 @@ session_tx_fifo_read_and_snd_i (vlib_main_t * vm, vlib_node_runtime_t * node,
*/
/* Get free buffer */
+ ASSERT (n_bufs >= 1);
bi0 = smm->tx_buffers[thread_index][--n_bufs];
+ ASSERT (bi0);
_vec_len (smm->tx_buffers[thread_index]) = n_bufs;
b0 = vlib_get_buffer (vm, bi0);
@@ -545,9 +555,10 @@ skip_dequeue:
my_thread_index,
&n_tx_packets);
/* Out of buffers */
- if (rv < 0)
+ if (PREDICT_FALSE (rv < 0))
{
- vec_add1 (smm->pending_event_vector[my_thread_index], *e0);
+ vlib_node_increment_counter (vm, node->node_index,
+ SESSION_QUEUE_ERROR_NO_BUFFER, 1);
continue;
}
break;