b->total_length_not_including_first_buffer = 0;
chain_b = b;
- left_from_seg = clib_min (ctx->snd_mss - b->current_length,
+ left_from_seg = clib_min (ctx->sp.snd_mss - b->current_length,
ctx->left_to_snd);
to_deq = left_from_seg;
for (j = 1; j < ctx->n_bufs_per_seg; j++)
if (peek_data)
{
n_bytes_read = svm_fifo_peek (ctx->s->tx_fifo,
- ctx->tx_offset, len_to_deq, data);
- ctx->tx_offset += n_bytes_read;
+ ctx->sp.tx_offset, len_to_deq, data);
+ ctx->sp.tx_offset += n_bytes_read;
}
else
{
if (peek_data)
{
- n_bytes_read = svm_fifo_peek (ctx->s->tx_fifo, ctx->tx_offset,
+ n_bytes_read = svm_fifo_peek (ctx->s->tx_fifo, ctx->sp.tx_offset,
len_to_deq, data0);
ASSERT (n_bytes_read > 0);
/* Keep track of progress locally, transport is also supposed to
* increment it independently when pushing the header */
- ctx->tx_offset += n_bytes_read;
+ ctx->sp.tx_offset += n_bytes_read;
}
else
{
if (peek_data)
{
/* Offset in rx fifo from where to peek data */
- ctx->tx_offset = ctx->transport_vft->tx_fifo_offset (ctx->tc);
- if (PREDICT_FALSE (ctx->tx_offset >= ctx->max_dequeue))
+ if (PREDICT_FALSE (ctx->sp.tx_offset >= ctx->max_dequeue))
{
ctx->max_len_to_snd = 0;
return;
}
- ctx->max_dequeue -= ctx->tx_offset;
+ ctx->max_dequeue -= ctx->sp.tx_offset;
}
else
{
ASSERT (ctx->max_dequeue > 0);
/* Ensure we're not writing more than transport window allows */
- if (ctx->max_dequeue < ctx->snd_space)
+ if (ctx->max_dequeue < ctx->sp.snd_space)
{
/* Constrained by tx queue. Try to send only fully formed segments */
- ctx->max_len_to_snd =
- (ctx->max_dequeue > ctx->snd_mss) ?
- ctx->max_dequeue - ctx->max_dequeue % ctx->snd_mss : ctx->max_dequeue;
+ ctx->max_len_to_snd = (ctx->max_dequeue > ctx->sp.snd_mss) ?
+ (ctx->max_dequeue - (ctx->max_dequeue % ctx->sp.snd_mss)) :
+ ctx->max_dequeue;
/* TODO Nagle ? */
}
else
{
/* Expectation is that snd_space0 is already a multiple of snd_mss */
- ctx->max_len_to_snd = ctx->snd_space;
+ ctx->max_len_to_snd = ctx->sp.snd_space;
}
/* Check if we're tx constrained by the node */
- ctx->n_segs_per_evt = ceil ((f64) ctx->max_len_to_snd / ctx->snd_mss);
+ ctx->n_segs_per_evt = ceil ((f64) ctx->max_len_to_snd / ctx->sp.snd_mss);
if (ctx->n_segs_per_evt > max_segs)
{
ctx->n_segs_per_evt = max_segs;
- ctx->max_len_to_snd = max_segs * ctx->snd_mss;
+ ctx->max_len_to_snd = max_segs * ctx->sp.snd_mss;
}
n_bytes_per_buf = vlib_buffer_get_default_data_size (vm);
ASSERT (n_bytes_per_buf > TRANSPORT_MAX_HDRS_LEN);
- n_bytes_per_seg = TRANSPORT_MAX_HDRS_LEN + ctx->snd_mss;
+ n_bytes_per_seg = TRANSPORT_MAX_HDRS_LEN + ctx->sp.snd_mss;
ctx->n_bufs_per_seg = ceil ((f64) n_bytes_per_seg / n_bytes_per_buf);
- ctx->deq_per_buf = clib_min (ctx->snd_mss, n_bytes_per_buf);
- ctx->deq_per_first_buf = clib_min (ctx->snd_mss,
+ ctx->deq_per_buf = clib_min (ctx->sp.snd_mss, n_bytes_per_buf);
+ ctx->deq_per_first_buf = clib_min (ctx->sp.snd_mss,
n_bytes_per_buf -
TRANSPORT_MAX_HDRS_LEN);
}
always_inline void
session_tx_maybe_reschedule (session_worker_t * wrk,
session_tx_context_t * ctx,
- session_evt_elt_t * elt, u8 is_peek)
+ session_evt_elt_t * elt)
{
session_t *s = ctx->s;
svm_fifo_unset_event (s->tx_fifo);
- if (svm_fifo_max_dequeue_cons (s->tx_fifo) > (is_peek ? ctx->tx_offset : 0))
+ if (svm_fifo_max_dequeue_cons (s->tx_fifo) > ctx->sp.tx_offset)
if (svm_fifo_set_event (s->tx_fifo))
session_evt_add_head_old (wrk, elt);
}
}
}
- ctx->snd_mss = ctx->transport_vft->send_mss (ctx->tc);
- if (PREDICT_FALSE (ctx->snd_mss == 0))
- {
- session_evt_add_old (wrk, elt);
- return SESSION_TX_NO_DATA;
- }
-
- ctx->snd_space = transport_connection_snd_space (ctx->tc);
+ transport_connection_snd_params (ctx->tc, &ctx->sp);
- /* This flow queue is "empty" so it should be re-evaluated before
- * the ones that have data to send. */
- if (!ctx->snd_space)
+ if (!ctx->sp.snd_space)
{
- session_evt_add_head_old (wrk, elt);
+ /* This flow queue is "empty" so it should be re-evaluated before
+ * the ones that have data to send. */
+ if (PREDICT_TRUE (!ctx->sp.flags))
+ session_evt_add_head_old (wrk, elt);
+ /* Request to postpone the session, e.g., zero-wnd and transport
+ * is not currently probing */
+ else if (ctx->sp.flags & TRANSPORT_SND_F_POSTPONE)
+ session_evt_add_old (wrk, elt);
+ /* If the deschedule flag was set, remove session from scheduler.
+ * Transport is responsible for rescheduling this session. */
+ else
+ transport_connection_deschedule (ctx->tc);
+
return SESSION_TX_NO_DATA;
}
session_evt_add_head_old (wrk, elt);
return SESSION_TX_NO_DATA;
}
- snd_space = clib_min (ctx->snd_space, snd_space);
- ctx->snd_space = snd_space >= ctx->snd_mss ?
- snd_space - snd_space % ctx->snd_mss : snd_space;
+ snd_space = clib_min (ctx->sp.snd_space, snd_space);
+ ctx->sp.snd_space = snd_space >= ctx->sp.snd_mss ?
+ snd_space - snd_space % ctx->sp.snd_mss : snd_space;
}
/* Check how much we can pull. */
if (PREDICT_FALSE (!ctx->max_len_to_snd))
{
transport_connection_tx_pacer_reset_bucket (ctx->tc, 0);
- session_tx_maybe_reschedule (wrk, ctx, elt, peek_data);
+ session_tx_maybe_reschedule (wrk, ctx, elt);
return SESSION_TX_NO_DATA;
}
if (ctx->max_len_to_snd < ctx->max_dequeue)
session_evt_add_old (wrk, elt);
else
- session_tx_maybe_reschedule (wrk, ctx, elt, peek_data);
+ session_tx_maybe_reschedule (wrk, ctx, elt);
if (!peek_data
&& ctx->transport_vft->transport_options.tx_type == TRANSPORT_TX_DGRAM)
Code Review / vpp.git / blobdiff