diff options
| -rw-r--r-- | src/vnet/tcp/tcp.c | 50 | ||||
| -rw-r--r-- | src/vnet/tcp/tcp.h | 40 | ||||
| -rw-r--r-- | src/vnet/tcp/tcp_input.c | 32 | ||||
| -rw-r--r-- | src/vnet/tcp/tcp_output.c | 271 |
4 files changed, 195 insertions, 198 deletions
diff --git a/src/vnet/tcp/tcp.c b/src/vnet/tcp/tcp.c index bdf9c7af608..1726355f0e3 100644 --- a/src/vnet/tcp/tcp.c +++ b/src/vnet/tcp/tcp.c @@ -546,7 +546,7 @@ tcp_init_snd_vars (tcp_connection_t * tc) * handshake may make it look as if time has flown in the opposite * direction for us. */ - tcp_set_time_now (vlib_get_thread_index ()); + tcp_set_time_now (tcp_get_worker (vlib_get_thread_index ())); time_now = tcp_time_now (); tc->iss = random_u32 (&time_now); @@ -1113,12 +1113,12 @@ tcp_session_tx_fifo_offset (transport_connection_t * trans_conn) static void tcp_update_time (f64 now, u8 thread_index) { - tcp_set_time_now (thread_index); - tw_timer_expire_timers_16t_2w_512sl (&tcp_main. - wrk_ctx[thread_index].timer_wheel, - now); - tcp_do_fastretransmits (thread_index); - tcp_flush_frames_to_output (thread_index); + tcp_worker_ctx_t *wrk = tcp_get_worker (thread_index); + + tcp_set_time_now (wrk); + tw_timer_expire_timers_16t_2w_512sl (&wrk->timer_wheel, now); + tcp_do_fastretransmits (wrk); + tcp_flush_frames_to_output (wrk); } static u32 @@ -1291,13 +1291,12 @@ tcp_initialize_timer_wheels (tcp_main_t * tm) static clib_error_t * tcp_main_enable (vlib_main_t * vm) { - tcp_main_t *tm = vnet_get_tcp_main (); vlib_thread_main_t *vtm = vlib_get_thread_main (); + u32 num_threads, n_workers, prealloc_conn_per_wrk; + tcp_connection_t *tc __attribute__ ((unused)); + tcp_main_t *tm = vnet_get_tcp_main (); clib_error_t *error = 0; - u32 num_threads; int thread; - tcp_connection_t *tc __attribute__ ((unused)); - u32 preallocated_connections_per_thread; if ((error = vlib_call_init_function (vm, ip_main_init))) return error; @@ -1320,27 +1319,11 @@ tcp_main_enable (vlib_main_t * vm) num_threads = 1 /* main thread */ + vtm->n_threads; vec_validate (tm->connections, num_threads - 1); vec_validate (tm->wrk_ctx, num_threads - 1); + n_workers = num_threads == 1 ? 1 : vtm->n_threads; + prealloc_conn_per_wrk = tm->preallocated_connections / n_workers; - /* - * Preallocate connections. Assume that thread 0 won't - * use preallocated threads when running multi-core - */ - if (num_threads == 1) + for (thread = 0; thread < num_threads; thread++) { - thread = 0; - preallocated_connections_per_thread = tm->preallocated_connections; - } - else - { - thread = 1; - preallocated_connections_per_thread = - tm->preallocated_connections / (num_threads - 1); - } - for (; thread < num_threads; thread++) - { - if (preallocated_connections_per_thread) - pool_init_fixed (tm->connections[thread], - preallocated_connections_per_thread); vec_validate (tm->wrk_ctx[thread].pending_fast_rxt, 0); vec_validate (tm->wrk_ctx[thread].ongoing_fast_rxt, 0); vec_validate (tm->wrk_ctx[thread].postponed_fast_rxt, 0); @@ -1348,6 +1331,13 @@ tcp_main_enable (vlib_main_t * vm) vec_reset_length (tm->wrk_ctx[thread].ongoing_fast_rxt); vec_reset_length (tm->wrk_ctx[thread].postponed_fast_rxt); tm->wrk_ctx[thread].vm = vlib_mains[thread]; + + /* + * Preallocate connections. Assume that thread 0 won't + * use preallocated threads when running multi-core + */ + if ((thread > 0 || num_threads == 1) && prealloc_conn_per_wrk) + pool_init_fixed (tm->connections[thread], prealloc_conn_per_wrk); } /* diff --git a/src/vnet/tcp/tcp.h b/src/vnet/tcp/tcp.h index f7424c3202e..71af461aca3 100644 --- a/src/vnet/tcp/tcp.h +++ b/src/vnet/tcp/tcp.h @@ -470,6 +470,12 @@ vnet_get_tcp_main () return &tcp_main; } +always_inline tcp_worker_ctx_t * +tcp_get_worker (u32 thread_index) +{ + return &tcp_main.wrk_ctx[thread_index]; +} + always_inline tcp_header_t * tcp_buffer_hdr (vlib_buffer_t * b) { @@ -559,10 +565,11 @@ void tcp_send_fin (tcp_connection_t * tc); void tcp_init_mss (tcp_connection_t * tc); void tcp_update_burst_snd_vars (tcp_connection_t * tc); void tcp_update_rto (tcp_connection_t * tc); -void tcp_flush_frame_to_output (vlib_main_t * vm, u8 thread_index, u8 is_ip4); -void tcp_flush_frames_to_output (u8 thread_index); -void tcp_program_fastretransmit (tcp_connection_t * tc); -void tcp_do_fastretransmits (u32 thread_index); +void tcp_flush_frame_to_output (tcp_worker_ctx_t * wrk, u8 is_ip4); +void tcp_flush_frames_to_output (tcp_worker_ctx_t * wrk); +void tcp_program_fastretransmit (tcp_worker_ctx_t * wrk, + tcp_connection_t * tc); +void tcp_do_fastretransmits (tcp_worker_ctx_t * wrk); always_inline u32 tcp_end_seq (tcp_header_t * th, u32 len) @@ -680,10 +687,14 @@ tcp_is_lost_fin (tcp_connection_t * tc) } u32 tcp_snd_space (tcp_connection_t * tc); -int tcp_retransmit_first_unacked (tcp_connection_t * tc); -int tcp_fast_retransmit_no_sack (tcp_connection_t * tc, u32 burst_size); -int tcp_fast_retransmit_sack (tcp_connection_t * tc, u32 burst_size); -int tcp_fast_retransmit (tcp_connection_t * tc, u32 burst_size); +int tcp_retransmit_first_unacked (tcp_worker_ctx_t * wrk, + tcp_connection_t * tc); +int tcp_fast_retransmit_no_sack (tcp_worker_ctx_t * wrk, + tcp_connection_t * tc, u32 burst_size); +int tcp_fast_retransmit_sack (tcp_worker_ctx_t * wrk, tcp_connection_t * tc, + u32 burst_size); +int tcp_fast_retransmit (tcp_worker_ctx_t * wrk, tcp_connection_t * tc, + u32 burst_size); void tcp_cc_init_congestion (tcp_connection_t * tc); void tcp_cc_fastrecovery_exit (tcp_connection_t * tc); @@ -699,6 +710,12 @@ tcp_time_now (void) return tcp_main.wrk_ctx[vlib_get_thread_index ()].time_now; } +always_inline u32 +tcp_time_now_w_thread (u32 thread_index) +{ + return tcp_main.wrk_ctx[thread_index].time_now; +} + always_inline f64 tcp_time_now_us (u32 thread_index) { @@ -706,11 +723,10 @@ tcp_time_now_us (u32 thread_index) } always_inline u32 -tcp_set_time_now (u32 thread_index) +tcp_set_time_now (tcp_worker_ctx_t * wrk) { - tcp_main.wrk_ctx[thread_index].time_now = clib_cpu_time_now () - * tcp_main.tstamp_ticks_per_clock; - return tcp_main.wrk_ctx[thread_index].time_now; + wrk->time_now = clib_cpu_time_now () * tcp_main.tstamp_ticks_per_clock; + return wrk->time_now; } u32 tcp_push_header (tcp_connection_t * tconn, vlib_buffer_t * b); diff --git a/src/vnet/tcp/tcp_input.c b/src/vnet/tcp/tcp_input.c index 154b9ac8363..af13c5f8215 100644 --- a/src/vnet/tcp/tcp_input.c +++ b/src/vnet/tcp/tcp_input.c @@ -258,7 +258,7 @@ tcp_update_timestamp (tcp_connection_t * tc, u32 seq, u32 seq_end) { ASSERT (timestamp_leq (tc->tsval_recent, tc->rcv_opts.tsval)); tc->tsval_recent = tc->rcv_opts.tsval; - tc->tsval_recent_age = tcp_time_now (); + tc->tsval_recent_age = tcp_time_now_w_thread (tc->c_thread_index); } } @@ -308,7 +308,7 @@ tcp_segment_validate (vlib_main_t * vm, tcp_connection_t * tc0, /* If it just so happens that a segment updates tsval_recent for a * segment over 24 days old, invalidate tsval_recent. */ if (timestamp_lt (tc0->tsval_recent_age + TCP_PAWS_IDLE, - tcp_time_now ())) + tcp_time_now_w_thread (tc0->c_thread_index))) { /* Age isn't reset until we get a valid tsval (bsd inspired) */ tc0->tsval_recent = 0; @@ -470,7 +470,8 @@ tcp_update_rtt (tcp_connection_t * tc, u32 ack) * seq_lt (tc->snd_una, ack). This is a condition for calling update_rtt */ else if (tcp_opts_tstamp (&tc->rcv_opts) && tc->rcv_opts.tsecr) { - mrtt = clib_max (tcp_time_now () - tc->rcv_opts.tsecr, 1); + u32 now = tcp_time_now_w_thread (tc->c_thread_index); + mrtt = clib_max (now - tc->rcv_opts.tsecr, 1); } /* Ignore dubious measurements */ @@ -1185,9 +1186,8 @@ tcp_should_fastrecover (tcp_connection_t * tc) } void -tcp_program_fastretransmit (tcp_connection_t * tc) +tcp_program_fastretransmit (tcp_worker_ctx_t * wrk, tcp_connection_t * tc) { - tcp_worker_ctx_t *wrk = &tcp_main.wrk_ctx[tc->c_thread_index]; if (!(tc->flags & TCP_CONN_FRXT_PENDING)) { vec_add1 (wrk->pending_fast_rxt, tc->c_c_index); @@ -1196,11 +1196,10 @@ tcp_program_fastretransmit (tcp_connection_t * tc) } void -tcp_do_fastretransmits (u32 thread_index) +tcp_do_fastretransmits (tcp_worker_ctx_t * wrk) { - tcp_worker_ctx_t *wrk = &tcp_main.wrk_ctx[thread_index]; + u32 *ongoing_fast_rxt, burst_bytes, sent_bytes, thread_index; u32 max_burst_size, burst_size, n_segs = 0, n_segs_now; - u32 *ongoing_fast_rxt, burst_bytes, sent_bytes; tcp_connection_t *tc; u64 last_cpu_time; int i; @@ -1209,6 +1208,7 @@ tcp_do_fastretransmits (u32 thread_index) && vec_len (wrk->postponed_fast_rxt) == 0) return; + thread_index = wrk->vm->thread_index; last_cpu_time = wrk->vm->clib_time.last_cpu_time; ongoing_fast_rxt = wrk->ongoing_fast_rxt; vec_append (ongoing_fast_rxt, wrk->postponed_fast_rxt); @@ -1240,15 +1240,14 @@ tcp_do_fastretransmits (u32 thread_index) burst_size = clib_min (burst_size, burst_bytes / tc->snd_mss); if (!burst_size) { - tcp_program_fastretransmit (tc); + tcp_program_fastretransmit (wrk, tc); continue; } - n_segs_now = tcp_fast_retransmit (tc, burst_size); + n_segs_now = tcp_fast_retransmit (wrk, tc, burst_size); sent_bytes = clib_min (n_segs_now * tc->snd_mss, burst_bytes); transport_connection_tx_pacer_update_bytes (&tc->connection, sent_bytes); - n_segs += n_segs_now; } _vec_len (ongoing_fast_rxt) = 0; @@ -1267,7 +1266,7 @@ tcp_cc_handle_event (tcp_connection_t * tc, u32 is_dack) { if (tc->bytes_acked) goto partial_ack; - tcp_program_fastretransmit (tc); + tcp_program_fastretransmit (tcp_get_worker (tc->c_thread_index), tc); return; } /* @@ -1322,7 +1321,8 @@ tcp_cc_handle_event (tcp_connection_t * tc, u32 is_dack) byte_rate = (0.3 * tc->cwnd) / ((f64) TCP_TICK * tc->srtt); transport_connection_tx_pacer_init (&tc->connection, byte_rate, 0); - tcp_program_fastretransmit (tc); + tcp_program_fastretransmit (tcp_get_worker (tc->c_thread_index), + tc); return; } else if (!tc->bytes_acked @@ -1439,7 +1439,7 @@ partial_ack: /* * Since this was a partial ack, try to retransmit some more data */ - tcp_program_fastretransmit (tc); + tcp_program_fastretransmit (tcp_get_worker (tc->c_thread_index), tc); } /** @@ -2102,7 +2102,7 @@ tcp46_established_inline (vlib_main_t * vm, vlib_node_runtime_t * node, thread_index); err_counters[TCP_ERROR_EVENT_FIFO_FULL] = errors; tcp_store_err_counters (established, err_counters); - tcp_flush_frame_to_output (vm, thread_index, is_ip4); + tcp_flush_frame_to_output (tcp_get_worker (thread_index), is_ip4); return frame->n_vectors; } @@ -3393,7 +3393,7 @@ tcp46_input_inline (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b; u16 nexts[VLIB_FRAME_SIZE], *next; - tcp_set_time_now (thread_index); + tcp_set_time_now (tcp_get_worker (thread_index)); from = vlib_frame_vector_args (frame); n_left_from = frame->n_vectors; diff --git a/src/vnet/tcp/tcp_output.c b/src/vnet/tcp/tcp_output.c index 81579ef96a2..c315c031c97 100644 --- a/src/vnet/tcp/tcp_output.c +++ b/src/vnet/tcp/tcp_output.c @@ -361,7 +361,7 @@ tcp_make_established_options (tcp_connection_t * tc, tcp_options_t * opts) if (tcp_opts_tstamp (&tc->rcv_opts)) { opts->flags |= TCP_OPTS_FLAG_TSTAMP; - opts->tsval = tcp_time_now (); + opts->tsval = tcp_time_now_w_thread (tc->c_thread_index); opts->tsecr = tc->tsval_recent; len += TCP_OPTION_LEN_TIMESTAMP; } @@ -459,41 +459,37 @@ tcp_init_mss (tcp_connection_t * tc) } static int -tcp_alloc_tx_buffers (tcp_main_t * tm, u8 thread_index, u16 * n_bufs, - u32 wanted) +tcp_alloc_tx_buffers (tcp_worker_ctx_t * wrk, u16 * n_bufs, u32 wanted) { - tcp_worker_ctx_t *ctx = &tm->wrk_ctx[thread_index]; vlib_main_t *vm = vlib_get_main (); u32 n_alloc; ASSERT (wanted > *n_bufs); - vec_validate_aligned (ctx->tx_buffers, wanted - 1, CLIB_CACHE_LINE_BYTES); - n_alloc = vlib_buffer_alloc (vm, &ctx->tx_buffers[*n_bufs], + vec_validate_aligned (wrk->tx_buffers, wanted - 1, CLIB_CACHE_LINE_BYTES); + n_alloc = vlib_buffer_alloc (vm, &wrk->tx_buffers[*n_bufs], wanted - *n_bufs); *n_bufs += n_alloc; - _vec_len (ctx->tx_buffers) = *n_bufs; + _vec_len (wrk->tx_buffers) = *n_bufs; return n_alloc; } always_inline int -tcp_get_free_buffer_index (tcp_main_t * tm, u32 * bidx) +tcp_get_free_buffer_index (tcp_worker_ctx_t * wrk, u32 * bidx) { - u32 thread_index = vlib_get_thread_index (); - tcp_worker_ctx_t *ctx = &tm->wrk_ctx[thread_index]; - u16 n_bufs = vec_len (ctx->tx_buffers); + u16 n_bufs = vec_len (wrk->tx_buffers); - TCP_DBG_BUFFER_ALLOC_MAYBE_FAIL (thread_index); + TCP_DBG_BUFFER_ALLOC_MAYBE_FAIL (wrk->vm->thread_index); if (PREDICT_FALSE (!n_bufs)) { - if (!tcp_alloc_tx_buffers (tm, thread_index, &n_bufs, VLIB_FRAME_SIZE)) + if (!tcp_alloc_tx_buffers (wrk, &n_bufs, VLIB_FRAME_SIZE)) { *bidx = ~0; return -1; } } - *bidx = ctx->tx_buffers[--n_bufs]; - _vec_len (ctx->tx_buffers) = n_bufs; + *bidx = wrk->tx_buffers[--n_bufs]; + _vec_len (wrk->tx_buffers) = n_bufs; return 0; } @@ -644,11 +640,10 @@ tcp_make_synack (tcp_connection_t * tc, vlib_buffer_t * b) } always_inline void -tcp_enqueue_to_ip_lookup_i (vlib_main_t * vm, vlib_buffer_t * b, u32 bi, +tcp_enqueue_to_ip_lookup_i (tcp_worker_ctx_t * wrk, vlib_buffer_t * b, u32 bi, u8 is_ip4, u32 fib_index, u8 flush) { - tcp_main_t *tm = vnet_get_tcp_main (); - u32 thread_index = vlib_get_thread_index (); + vlib_main_t *vm = wrk->vm; u32 *to_next, next_index; vlib_frame_t *f; @@ -662,12 +657,12 @@ tcp_enqueue_to_ip_lookup_i (vlib_main_t * vm, vlib_buffer_t * b, u32 bi, next_index = is_ip4 ? ip4_lookup_node.index : ip6_lookup_node.index; tcp_trajectory_add_start (b, 1); - f = tm->wrk_ctx[thread_index].ip_lookup_tx_frames[!is_ip4]; + f = wrk->ip_lookup_tx_frames[!is_ip4]; if (!f) { f = vlib_get_frame_to_node (vm, next_index); ASSERT (f); - tm->wrk_ctx[thread_index].ip_lookup_tx_frames[!is_ip4] = f; + wrk->ip_lookup_tx_frames[!is_ip4] = f; } to_next = vlib_frame_vector_args (f); @@ -676,32 +671,30 @@ tcp_enqueue_to_ip_lookup_i (vlib_main_t * vm, vlib_buffer_t * b, u32 bi, if (flush || f->n_vectors == VLIB_FRAME_SIZE) { vlib_put_frame_to_node (vm, next_index, f); - tm->wrk_ctx[thread_index].ip_lookup_tx_frames[!is_ip4] = 0; + wrk->ip_lookup_tx_frames[!is_ip4] = 0; } } static void -tcp_enqueue_to_ip_lookup_now (vlib_main_t * vm, vlib_buffer_t * b, u32 bi, - u8 is_ip4, u32 fib_index) +tcp_enqueue_to_ip_lookup_now (tcp_worker_ctx_t * wrk, vlib_buffer_t * b, + u32 bi, u8 is_ip4, u32 fib_index) { - tcp_enqueue_to_ip_lookup_i (vm, b, bi, is_ip4, fib_index, 1); + tcp_enqueue_to_ip_lookup_i (wrk, b, bi, is_ip4, fib_index, 1); } static void -tcp_enqueue_to_ip_lookup (vlib_main_t * vm, vlib_buffer_t * b, u32 bi, +tcp_enqueue_to_ip_lookup (tcp_worker_ctx_t * wrk, vlib_buffer_t * b, u32 bi, u8 is_ip4, u32 fib_index) { - tcp_enqueue_to_ip_lookup_i (vm, b, bi, is_ip4, fib_index, 0); - if (vm->thread_index == 0 && vlib_num_workers ()) - session_flush_frames_main_thread (vm); + tcp_enqueue_to_ip_lookup_i (wrk, b, bi, is_ip4, fib_index, 0); + if (wrk->vm->thread_index == 0 && vlib_num_workers ()) + session_flush_frames_main_thread (wrk->vm); } always_inline void -tcp_enqueue_to_output_i (vlib_main_t * vm, vlib_buffer_t * b, u32 bi, +tcp_enqueue_to_output_i (tcp_worker_ctx_t * wrk, vlib_buffer_t * b, u32 bi, u8 is_ip4, u8 flush) { - tcp_main_t *tm = vnet_get_tcp_main (); - u32 thread_index = vlib_get_thread_index (); u32 *to_next, next_index; vlib_frame_t *f; @@ -713,34 +706,35 @@ tcp_enqueue_to_output_i (vlib_main_t * vm, vlib_buffer_t * b, u32 bi, tcp_trajectory_add_start (b, 2); /* Get frame to v4/6 output node */ - f = tm->wrk_ctx[thread_index].tx_frames[!is_ip4]; + f = wrk->tx_frames[!is_ip4]; if (!f) { - f = vlib_get_frame_to_node (vm, next_index); + f = vlib_get_frame_to_node (wrk->vm, next_index); ASSERT (f); - tm->wrk_ctx[thread_index].tx_frames[!is_ip4] = f; + wrk->tx_frames[!is_ip4] = f; } to_next = vlib_frame_vector_args (f); to_next[f->n_vectors] = bi; f->n_vectors += 1; if (flush || f->n_vectors == VLIB_FRAME_SIZE) { - vlib_put_frame_to_node (vm, next_index, f); - tm->wrk_ctx[thread_index].tx_frames[!is_ip4] = 0; + vlib_put_frame_to_node (wrk->vm, next_index, f); + wrk->tx_frames[!is_ip4] = 0; } } static void -tcp_enqueue_to_output (vlib_main_t * vm, vlib_buffer_t * b, u32 bi, u8 is_ip4) +tcp_enqueue_to_output (tcp_worker_ctx_t * wrk, vlib_buffer_t * b, u32 bi, + u8 is_ip4) { - tcp_enqueue_to_output_i (vm, b, bi, is_ip4, 0); + tcp_enqueue_to_output_i (wrk, b, bi, is_ip4, 0); } static void -tcp_enqueue_to_output_now (vlib_main_t * vm, vlib_buffer_t * b, u32 bi, +tcp_enqueue_to_output_now (tcp_worker_ctx_t * wrk, vlib_buffer_t * b, u32 bi, u8 is_ip4) { - tcp_enqueue_to_output_i (vm, b, bi, is_ip4, 1); + tcp_enqueue_to_output_i (wrk, b, bi, is_ip4, 1); } static int @@ -830,10 +824,10 @@ tcp_make_reset_in_place (vlib_main_t * vm, vlib_buffer_t * b0, void tcp_send_reset_w_pkt (tcp_connection_t * tc, vlib_buffer_t * pkt, u8 is_ip4) { + tcp_worker_ctx_t *wrk = tcp_get_worker (tc->c_thread_index); + vlib_main_t *vm = wrk->vm; vlib_buffer_t *b; u32 bi, sw_if_index, fib_index; - tcp_main_t *tm = vnet_get_tcp_main (); - vlib_main_t *vm = vlib_get_main (); u8 tcp_hdr_len, flags = 0; tcp_header_t *th, *pkt_th; u32 seq, ack; @@ -841,7 +835,7 @@ tcp_send_reset_w_pkt (tcp_connection_t * tc, vlib_buffer_t * pkt, u8 is_ip4) ip6_header_t *ih6, *pkt_ih6; fib_protocol_t fib_proto; - if (PREDICT_FALSE (tcp_get_free_buffer_index (tm, &bi))) + if (PREDICT_FALSE (tcp_get_free_buffer_index (wrk, &bi))) return; b = vlib_get_buffer (vm, bi); @@ -899,7 +893,7 @@ tcp_send_reset_w_pkt (tcp_connection_t * tc, vlib_buffer_t * pkt, u8 is_ip4) ASSERT (!bogus); } - tcp_enqueue_to_ip_lookup_now (vm, b, bi, is_ip4, fib_index); + tcp_enqueue_to_ip_lookup_now (wrk, b, bi, is_ip4, fib_index); TCP_EVT_DBG (TCP_EVT_RST_SENT, tc); } @@ -909,15 +903,15 @@ tcp_send_reset_w_pkt (tcp_connection_t * tc, vlib_buffer_t * pkt, u8 is_ip4) void tcp_send_reset (tcp_connection_t * tc) { - vlib_main_t *vm = vlib_get_main (); - tcp_main_t *tm = vnet_get_tcp_main (); + tcp_worker_ctx_t *wrk = tcp_get_worker (tc->c_thread_index); + vlib_main_t *vm = wrk->vm; vlib_buffer_t *b; u32 bi; tcp_header_t *th; u16 tcp_hdr_opts_len, advertise_wnd, opts_write_len; u8 flags; - if (PREDICT_FALSE (tcp_get_free_buffer_index (tm, &bi))) + if (PREDICT_FALSE (tcp_get_free_buffer_index (wrk, &bi))) return; b = vlib_get_buffer (vm, bi); tcp_init_buffer (vm, b); @@ -948,15 +942,16 @@ tcp_send_reset (tcp_connection_t * tc) th->checksum = ip6_tcp_udp_icmp_compute_checksum (vm, b, ih6, &bogus); ASSERT (!bogus); } - tcp_enqueue_to_ip_lookup_now (vm, b, bi, tc->c_is_ip4, tc->c_fib_index); + tcp_enqueue_to_ip_lookup_now (wrk, b, bi, tc->c_is_ip4, tc->c_fib_index); TCP_EVT_DBG (TCP_EVT_RST_SENT, tc); } static void -tcp_push_ip_hdr (tcp_main_t * tm, tcp_connection_t * tc, vlib_buffer_t * b) +tcp_push_ip_hdr (tcp_worker_ctx_t * wrk, tcp_connection_t * tc, + vlib_buffer_t * b) { tcp_header_t *th = vlib_buffer_get_current (b); - vlib_main_t *vm = vlib_get_main (); + vlib_main_t *vm = wrk->vm; if (tc->c_is_ip4) { ip4_header_t *ih; @@ -986,10 +981,10 @@ tcp_push_ip_hdr (tcp_main_t * tm, tcp_connection_t * tc, vlib_buffer_t * b) void tcp_send_syn (tcp_connection_t * tc) { + tcp_worker_ctx_t *wrk = tcp_get_worker (tc->c_thread_index); + vlib_main_t *vm = wrk->vm; vlib_buffer_t *b; u32 bi; - tcp_main_t *tm = vnet_get_tcp_main (); - vlib_main_t *vm = vlib_get_main (); /* * Setup retransmit and establish timers before requesting buffer @@ -999,7 +994,7 @@ tcp_send_syn (tcp_connection_t * tc) tcp_timer_update (tc, TCP_TIMER_RETRANSMIT_SYN, tc->rto * TCP_TO_TIMER_TICK); - if (PREDICT_FALSE (tcp_get_free_buffer_index (tm, &bi))) + if (PREDICT_FALSE (tcp_get_free_buffer_index (wrk, &bi))) return; b = vlib_get_buffer (vm, bi); @@ -1011,8 +1006,8 @@ tcp_send_syn (tcp_connection_t * tc) tc->rtt_seq = tc->snd_nxt; tc->rto_boff = 0; - tcp_push_ip_hdr (tm, tc, b); - tcp_enqueue_to_ip_lookup (vm, b, bi, tc->c_is_ip4, tc->c_fib_index); + tcp_push_ip_hdr (wrk, tc, b); + tcp_enqueue_to_ip_lookup (wrk, b, bi, tc->c_is_ip4, tc->c_fib_index); TCP_EVT_DBG (TCP_EVT_SYN_SENT, tc); } @@ -1020,16 +1015,14 @@ tcp_send_syn (tcp_connection_t * tc) * Flush tx frame populated by retransmits and timer pops */ void -tcp_flush_frame_to_output (vlib_main_t * vm, u8 thread_index, u8 is_ip4) +tcp_flush_frame_to_output (tcp_worker_ctx_t * wrk, u8 is_ip4) { - if (tcp_main.wrk_ctx[thread_index].tx_frames[!is_ip4]) + if (wrk->tx_frames[!is_ip4]) { u32 next_index; next_index = is_ip4 ? tcp4_output_node.index : tcp6_output_node.index; - vlib_put_frame_to_node (vm, next_index, - tcp_main. - wrk_ctx[thread_index].tx_frames[!is_ip4]); - tcp_main.wrk_ctx[thread_index].tx_frames[!is_ip4] = 0; + vlib_put_frame_to_node (wrk->vm, next_index, wrk->tx_frames[!is_ip4]); + wrk->tx_frames[!is_ip4] = 0; } } @@ -1037,17 +1030,15 @@ tcp_flush_frame_to_output (vlib_main_t * vm, u8 thread_index, u8 is_ip4) * Flush ip lookup tx frames populated by timer pops */ static void -tcp_flush_frame_to_ip_lookup (vlib_main_t * vm, u8 thread_index, u8 is_ip4) +tcp_flush_frame_to_ip_lookup (tcp_worker_ctx_t * wrk, u8 is_ip4) { - if (tcp_main.wrk_ctx[thread_index].ip_lookup_tx_frames[!is_ip4]) + if (wrk->ip_lookup_tx_frames[!is_ip4]) { u32 next_index; next_index = is_ip4 ? ip4_lookup_node.index : ip6_lookup_node.index; - vlib_put_frame_to_node (vm, next_index, - tcp_main. - wrk_ctx[thread_index].ip_lookup_tx_frames - [!is_ip4]); - tcp_main.wrk_ctx[thread_index].ip_lookup_tx_frames[!is_ip4] = 0; + vlib_put_frame_to_node (wrk->vm, next_index, + wrk->ip_lookup_tx_frames[!is_ip4]); + wrk->ip_lookup_tx_frames[!is_ip4] = 0; } } @@ -1055,13 +1046,12 @@ tcp_flush_frame_to_ip_lookup (vlib_main_t * vm, u8 thread_index, u8 is_ip4) * Flush v4 and v6 tcp and ip-lookup tx frames for thread index */ void -tcp_flush_frames_to_output (u8 thread_index) +tcp_flush_frames_to_output (tcp_worker_ctx_t * wrk) { - vlib_main_t *vm = vlib_get_main (); - tcp_flush_frame_to_output (vm, thread_index, 1); - tcp_flush_frame_to_output (vm, thread_index, 0); - tcp_flush_frame_to_ip_lookup (vm, thread_index, 1); - tcp_flush_frame_to_ip_lookup (vm, thread_index, 0); + tcp_flush_frame_to_output (wrk, 1); + tcp_flush_frame_to_output (wrk, 0); + tcp_flush_frame_to_ip_lookup (wrk, 1); + tcp_flush_frame_to_ip_lookup (wrk, 0); } /** @@ -1070,8 +1060,8 @@ tcp_flush_frames_to_output (u8 thread_index) void tcp_send_fin (tcp_connection_t * tc) { - tcp_main_t *tm = vnet_get_tcp_main (); - vlib_main_t *vm = vlib_get_main (); + tcp_worker_ctx_t *wrk = tcp_get_worker (tc->c_thread_index); + vlib_main_t *vm = wrk->vm; vlib_buffer_t *b; u32 bi; u8 fin_snt = 0; @@ -1080,7 +1070,7 @@ tcp_send_fin (tcp_connection_t * tc) if (fin_snt) tc->snd_nxt = tc->snd_una; - if (PREDICT_FALSE (tcp_get_free_buffer_index (tm, &bi))) + if (PREDICT_FALSE (tcp_get_free_buffer_index (wrk, &bi))) { /* Out of buffers so program fin retransmit ASAP */ tcp_timer_update (tc, TCP_TIMER_RETRANSMIT, 1); @@ -1091,7 +1081,7 @@ tcp_send_fin (tcp_connection_t * tc) b = vlib_get_buffer (vm, bi); tcp_init_buffer (vm, b); tcp_make_fin (tc, b); - tcp_enqueue_to_output_now (vm, b, bi, tc->c_is_ip4); + tcp_enqueue_to_output_now (wrk, b, bi, tc->c_is_ip4); TCP_EVT_DBG (TCP_EVT_FIN_SENT, tc); post_enqueue: @@ -1217,21 +1207,20 @@ tcp_push_header (tcp_connection_t * tc, vlib_buffer_t * b) void tcp_send_ack (tcp_connection_t * tc) { - tcp_main_t *tm = vnet_get_tcp_main (); - vlib_main_t *vm = vlib_get_main (); - + tcp_worker_ctx_t *wrk = tcp_get_worker (tc->c_thread_index); + vlib_main_t *vm = wrk->vm; vlib_buffer_t *b; u32 bi; /* Get buffer */ - if (PREDICT_FALSE (tcp_get_free_buffer_index (tm, &bi))) + if (PREDICT_FALSE (tcp_get_free_buffer_index (wrk, &bi))) return; b = vlib_get_buffer (vm, bi); tcp_init_buffer (vm, b); /* Fill in the ACK */ tcp_make_ack (tc, b); - tcp_enqueue_to_output (vm, b, bi, tc->c_is_ip4); + tcp_enqueue_to_output (wrk, b, bi, tc->c_is_ip4); } /** @@ -1257,11 +1246,12 @@ tcp_timer_delack_handler (u32 index) * retransmit */ static u32 -tcp_prepare_retransmit_segment (tcp_connection_t * tc, u32 offset, +tcp_prepare_retransmit_segment (tcp_worker_ctx_t * wrk, + tcp_connection_t * tc, u32 offset, u32 max_deq_bytes, vlib_buffer_t ** b) { - tcp_main_t *tm = vnet_get_tcp_main (); - vlib_main_t *vm = vlib_get_main (); + u32 bytes_per_buffer = vnet_get_tcp_main ()->bytes_per_buffer; + vlib_main_t *vm = wrk->vm; int n_bytes = 0; u32 start, bi, available_bytes, seg_size; u8 *data; @@ -1305,9 +1295,9 @@ tcp_prepare_retransmit_segment (tcp_connection_t * tc, u32 offset, */ /* Easy case, buffer size greater than mss */ - if (PREDICT_TRUE (seg_size <= tm->bytes_per_buffer)) + if (PREDICT_TRUE (seg_size <= bytes_per_buffer)) { - if (PREDICT_FALSE (tcp_get_free_buffer_index (tm, &bi))) + if (PREDICT_FALSE (tcp_get_free_buffer_index (wrk, &bi))) return 0; *b = vlib_get_buffer (vm, bi); data = tcp_init_buffer (vm, *b); @@ -1323,19 +1313,16 @@ tcp_prepare_retransmit_segment (tcp_connection_t * tc, u32 offset, else { u32 chain_bi = ~0, n_bufs_per_seg; - u32 thread_index = vlib_get_thread_index (); u16 n_peeked, len_to_deq, available_bufs; vlib_buffer_t *chain_b, *prev_b; int i; /* Make sure we have enough buffers */ - n_bufs_per_seg = ceil ((double) seg_size / tm->bytes_per_buffer); - available_bufs = vec_len (tm->wrk_ctx[thread_index].tx_buffers); + n_bufs_per_seg = ceil ((double) seg_size / bytes_per_buffer); + available_bufs = vec_len (wrk->tx_buffers); if (n_bufs_per_seg > available_bufs) { - tcp_alloc_tx_buffers (tm, thread_index, &available_bufs, - VLIB_FRAME_SIZE); - + tcp_alloc_tx_buffers (wrk, &available_bufs, VLIB_FRAME_SIZE); if (n_bufs_per_seg > available_bufs) { *b = 0; @@ -1343,13 +1330,12 @@ tcp_prepare_retransmit_segment (tcp_connection_t * tc, u32 offset, } } - tcp_get_free_buffer_index (tm, &bi); + tcp_get_free_buffer_index (wrk, &bi); ASSERT (bi != (u32) ~ 0); *b = vlib_get_buffer (vm, bi); data = tcp_init_buffer (vm, *b); n_bytes = stream_session_peek_bytes (&tc->connection, data, offset, - tm->bytes_per_buffer - - MAX_HDRS_LEN); + bytes_per_buffer - MAX_HDRS_LEN); b[0]->current_length = n_bytes; b[0]->flags |= VLIB_BUFFER_TOTAL_LENGTH_VALID; b[0]->total_length_not_including_first_buffer = 0; @@ -1359,8 +1345,8 @@ tcp_prepare_retransmit_segment (tcp_connection_t * tc, u32 offset, for (i = 1; i < n_bufs_per_seg; i++) { prev_b = chain_b; - len_to_deq = clib_min (max_deq_bytes, tm->bytes_per_buffer); - tcp_get_free_buffer_index (tm, &chain_bi); + len_to_deq = clib_min (max_deq_bytes, bytes_per_buffer); + tcp_get_free_buffer_index (wrk, &chain_bi); ASSERT (chain_bi != (u32) ~ 0); chain_b = vlib_get_buffer (vm, chain_bi); chain_b->current_data = 0; @@ -1386,8 +1372,7 @@ tcp_prepare_retransmit_segment (tcp_connection_t * tc, u32 offset, } ASSERT (n_bytes > 0); - ASSERT (((*b)->current_data + (*b)->current_length) <= - tm->bytes_per_buffer); + ASSERT (((*b)->current_data + (*b)->current_length) <= bytes_per_buffer); if (tcp_in_fastrecovery (tc)) tc->snd_rxt_bytes += n_bytes; @@ -1428,9 +1413,9 @@ tcp_rxt_timeout_cc (tcp_connection_t * tc) static inline void tcp_timer_retransmit_handler_i (u32 index, u8 is_syn) { - tcp_main_t *tm = vnet_get_tcp_main (); - vlib_main_t *vm = vlib_get_main (); u32 thread_index = vlib_get_thread_index (); + tcp_worker_ctx_t *wrk = tcp_get_worker (thread_index); + vlib_main_t *vm = wrk->vm; tcp_connection_t *tc; vlib_buffer_t *b = 0; u32 bi, n_bytes; @@ -1503,7 +1488,7 @@ tcp_timer_retransmit_handler_i (u32 index, u8 is_syn) /* Send one segment. Note that n_bytes may be zero due to buffer * shortfall */ - n_bytes = tcp_prepare_retransmit_segment (tc, 0, tc->snd_mss, &b); + n_bytes = tcp_prepare_retransmit_segment (wrk, tc, 0, tc->snd_mss, &b); if (n_bytes == 0) { @@ -1515,9 +1500,9 @@ tcp_timer_retransmit_handler_i (u32 index, u8 is_syn) /* For first retransmit, record timestamp (Eifel detection RFC3522) */ if (tc->rto_boff == 1) - tc->snd_rxt_ts = tcp_time_now (); + tc->snd_rxt_ts = tcp_time_now_w_thread (tc->c_thread_index); - tcp_enqueue_to_output (vm, b, bi, tc->c_is_ip4); + tcp_enqueue_to_output (wrk, b, bi, tc->c_is_ip4); tcp_retransmit_timer_force_update (tc); } /* Retransmit for SYN */ @@ -1547,7 +1532,7 @@ tcp_timer_retransmit_handler_i (u32 index, u8 is_syn) tcp_timer_update (tc, TCP_TIMER_RETRANSMIT_SYN, tc->rto * TCP_TO_TIMER_TICK); - if (PREDICT_FALSE (tcp_get_free_buffer_index (tm, &bi))) + if (PREDICT_FALSE (tcp_get_free_buffer_index (wrk, &bi))) return; b = vlib_get_buffer (vm, bi); @@ -1558,8 +1543,8 @@ tcp_timer_retransmit_handler_i (u32 index, u8 is_syn) TCP_EVT_DBG (TCP_EVT_SYN_RXT, tc, 0); /* This goes straight to ipx_lookup. Retransmit timer set already */ - tcp_push_ip_hdr (tm, tc, b); - tcp_enqueue_to_ip_lookup (vm, b, bi, tc->c_is_ip4, tc->c_fib_index); + tcp_push_ip_hdr (wrk, tc, b); + tcp_enqueue_to_ip_lookup (wrk, b, bi, tc->c_is_ip4, tc->c_fib_index); } /* Retransmit SYN-ACK */ else if (tc->state == TCP_STATE_SYN_RCVD) @@ -1571,7 +1556,7 @@ tcp_timer_retransmit_handler_i (u32 index, u8 is_syn) tc->rto = clib_min (tc->rto << 1, TCP_RTO_MAX); tc->rtt_ts = 0; - if (PREDICT_FALSE (tcp_get_free_buffer_index (tm, &bi))) + if (PREDICT_FALSE (tcp_get_free_buffer_index (wrk, &bi))) { tcp_retransmit_timer_force_update (tc); return; @@ -1583,7 +1568,7 @@ tcp_timer_retransmit_handler_i (u32 index, u8 is_syn) TCP_EVT_DBG (TCP_EVT_SYN_RXT, tc, 1); /* Retransmit timer already updated, just enqueue to output */ - tcp_enqueue_to_output (vm, b, bi, tc->c_is_ip4); + tcp_enqueue_to_output (wrk, b, bi, tc->c_is_ip4); } else { @@ -1611,12 +1596,13 @@ tcp_timer_retransmit_syn_handler (u32 index) void tcp_timer_persist_handler (u32 index) { - tcp_main_t *tm = vnet_get_tcp_main (); - vlib_main_t *vm = vlib_get_main (); u32 thread_index = vlib_get_thread_index (); + tcp_worker_ctx_t *wrk = tcp_get_worker (thread_index); + u32 bi, max_snd_bytes, available_bytes, offset; + tcp_main_t *tm = vnet_get_tcp_main (); + vlib_main_t *vm = wrk->vm; tcp_connection_t *tc; vlib_buffer_t *b; - u32 bi, max_snd_bytes, available_bytes, offset; int n_bytes = 0; u8 *data; @@ -1657,7 +1643,7 @@ tcp_timer_persist_handler (u32 index) /* * Try to force the first unsent segment (or buffer) */ - if (PREDICT_FALSE (tcp_get_free_buffer_index (tm, &bi))) + if (PREDICT_FALSE (tcp_get_free_buffer_index (wrk, &bi))) { tcp_persist_timer_set (tc); return; @@ -1678,7 +1664,7 @@ tcp_timer_persist_handler (u32 index) tcp_push_hdr_i (tc, b, tc->state, /* compute opts */ 0, /* burst */ 0); tc->snd_una_max = tc->snd_nxt; tcp_validate_txf_size (tc, tc->snd_una_max - tc->snd_una); - tcp_enqueue_to_output (vm, b, bi, tc->c_is_ip4); + tcp_enqueue_to_output (wrk, b, bi, tc->c_is_ip4); /* Just sent new data, enable retransmit */ tcp_retransmit_timer_update (tc); @@ -1688,23 +1674,23 @@ tcp_timer_persist_handler (u32 index) * Retransmit first unacked segment */ int -tcp_retransmit_first_unacked (tcp_connection_t * tc) +tcp_retransmit_first_unacked (tcp_worker_ctx_t * wrk, tcp_connection_t * tc) { - vlib_main_t *vm = vlib_get_main (); - vlib_buffer_t *b; u32 bi, old_snd_nxt, n_bytes; + vlib_main_t *vm = wrk->vm; + vlib_buffer_t *b; old_snd_nxt = tc->snd_nxt; tc->snd_nxt = tc->snd_una; TCP_EVT_DBG (TCP_EVT_CC_EVT, tc, 1); - n_bytes = tcp_prepare_retransmit_segment (tc, 0, tc->snd_mss, &b); + n_bytes = tcp_prepare_retransmit_segment (wrk, tc, 0, tc->snd_mss, &b); if (!n_bytes) return -1; bi = vlib_get_buffer_index (vm, b); - tcp_enqueue_to_output (vm, b, bi, tc->c_is_ip4); + tcp_enqueue_to_output (wrk, b, bi, tc->c_is_ip4); tc->snd_nxt = old_snd_nxt; return 0; @@ -1714,9 +1700,10 @@ tcp_retransmit_first_unacked (tcp_connection_t * tc) * Do fast retransmit with SACKs */ int -tcp_fast_retransmit_sack (tcp_connection_t * tc, u32 burst_size) +tcp_fast_retransmit_sack (tcp_worker_ctx_t * wrk, tcp_connection_t * tc, + u32 burst_size) { - vlib_main_t *vm = vlib_get_main (); + vlib_main_t *vm = wrk->vm; u32 n_written = 0, offset, max_bytes, n_segs = 0; vlib_buffer_t *b = 0; sack_scoreboard_hole_t *hole; @@ -1734,7 +1721,7 @@ tcp_fast_retransmit_sack (tcp_connection_t * tc, u32 burst_size) if (snd_space < tc->snd_mss) { - tcp_program_fastretransmit (tc); + tcp_program_fastretransmit (wrk, tc); goto done; } @@ -1758,7 +1745,7 @@ tcp_fast_retransmit_sack (tcp_connection_t * tc, u32 burst_size) hole = scoreboard_first_hole (sb); if (hole && hole->start == tc->snd_una) { - tcp_retransmit_first_unacked (tc); + tcp_retransmit_first_unacked (wrk, tc); tcp_fastrecovery_first_on (tc); n_segs += 1; } @@ -1776,13 +1763,13 @@ tcp_fast_retransmit_sack (tcp_connection_t * tc, u32 burst_size) offset = tc->snd_congestion - tc->snd_una - max_bytes; sb->rescue_rxt = tc->snd_congestion; tc->snd_nxt = tc->snd_una + offset; - n_written = tcp_prepare_retransmit_segment (tc, offset, max_bytes, - &b); + n_written = tcp_prepare_retransmit_segment (wrk, tc, offset, + max_bytes, &b); if (!n_written) goto done; bi = vlib_get_buffer_index (vm, b); - tcp_enqueue_to_output (vm, b, bi, tc->c_is_ip4); + tcp_enqueue_to_output (wrk, b, bi, tc->c_is_ip4); n_segs += 1; break; } @@ -1793,7 +1780,8 @@ tcp_fast_retransmit_sack (tcp_connection_t * tc, u32 burst_size) break; offset = sb->high_rxt - tc->snd_una; tc->snd_nxt = sb->high_rxt; - n_written = tcp_prepare_retransmit_segment (tc, offset, max_bytes, &b); + n_written = tcp_prepare_retransmit_segment (wrk, tc, offset, max_bytes, + &b); /* Nothing left to retransmit */ if (n_written == 0) @@ -1801,14 +1789,14 @@ tcp_fast_retransmit_sack (tcp_connection_t * tc, u32 burst_size) bi = vlib_get_buffer_index (vm, b); sb->high_rxt += n_written; - tcp_enqueue_to_output (vm, b, bi, tc->c_is_ip4); + tcp_enqueue_to_output (wrk, b, bi, tc->c_is_ip4); ASSERT (n_written <= snd_space); snd_space -= n_written; n_segs += 1; } if (hole) - tcp_program_fastretransmit (tc); + tcp_program_fastretransmit (wrk, tc); done: /* If window allows, send 1 SMSS of new data */ @@ -1820,10 +1808,11 @@ done: * Fast retransmit without SACK info */ int -tcp_fast_retransmit_no_sack (tcp_connection_t * tc, u32 burst_size) +tcp_fast_retransmit_no_sack (tcp_worker_ctx_t * wrk, tcp_connection_t * tc, + u32 burst_size) { - vlib_main_t *vm = vlib_get_main (); u32 n_written = 0, offset = 0, bi, old_snd_nxt; + vlib_main_t *vm = wrk->vm; int snd_space, n_segs = 0; vlib_buffer_t *b; @@ -1838,21 +1827,22 @@ tcp_fast_retransmit_no_sack (tcp_connection_t * tc, u32 burst_size) while (snd_space > 0 && n_segs < burst_size) { offset += n_written; - n_written = tcp_prepare_retransmit_segment (tc, offset, snd_space, &b); + n_written = tcp_prepare_retransmit_segment (wrk, tc, offset, snd_space, + &b); /* Nothing left to retransmit */ if (n_written == 0) break; bi = vlib_get_buffer_index (vm, b); - tcp_enqueue_to_output (vm, b, bi, tc->c_is_ip4); + tcp_enqueue_to_output (wrk, b, bi, tc->c_is_ip4); snd_space -= n_written; n_segs += 1; } /* More data to resend */ if (seq_lt (tc->snd_nxt, tc->snd_congestion)) - tcp_program_fastretransmit (tc); + tcp_program_fastretransmit (wrk, tc); /* Restore snd_nxt. If window allows, send 1 SMSS of new data */ tc->snd_nxt = old_snd_nxt; @@ -1864,12 +1854,13 @@ tcp_fast_retransmit_no_sack (tcp_connection_t * tc, u32 burst_size) * Do fast retransmit */ int -tcp_fast_retransmit (tcp_connection_t * tc, u32 burst_size) +tcp_fast_retransmit (tcp_worker_ctx_t * wrk, tcp_connection_t * tc, + u32 burst_size) { if (tcp_opts_sack_permitted (&tc->rcv_opts)) - return tcp_fast_retransmit_sack (tc, burst_size); + return tcp_fast_retransmit_sack (wrk, tc, burst_size); else - return tcp_fast_retransmit_no_sack (tc, burst_size); + return tcp_fast_retransmit_no_sack (wrk, tc, burst_size); } static u32 @@ -2016,7 +2007,7 @@ tcp46_output_inline (vlib_main_t * vm, vlib_node_runtime_t * node, from = vlib_frame_vector_args (frame); n_left_from = frame->n_vectors; - tcp_set_time_now (thread_index); + tcp_set_time_now (tcp_get_worker (thread_index)); if (PREDICT_FALSE (node->flags & VLIB_NODE_FLAG_TRACE)) tcp46_output_trace_frame (vm, node, from, n_left_from); |