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be72ae6)
Also reset pacer on tcp retransmit timeout
Change-Id: I5a9edee4c00d1d169248d79587a9b10437c2bd87
Signed-off-by: Florin Coras <fcoras@cisco.com>
_vec_len (wrk->postponed_event_vector) = 0;
wrk->last_vlib_time = vlib_time_now (vlib_mains[i]);
_vec_len (wrk->postponed_event_vector) = 0;
wrk->last_vlib_time = vlib_time_now (vlib_mains[i]);
+ wrk->dispatch_period = 500e-6;
if (num_threads > 1)
clib_rwlock_init (&smm->wrk[i].peekers_rw_locks);
if (num_threads > 1)
clib_rwlock_init (&smm->wrk[i].peekers_rw_locks);
/** Peekers rw lock */
clib_rwlock_t peekers_rw_locks;
/** Peekers rw lock */
clib_rwlock_t peekers_rw_locks;
} session_manager_worker_t;
struct _session_manager_main
} session_manager_worker_t;
struct _session_manager_main
session_update_dispatch_period (session_manager_worker_t * wrk, f64 now,
u32 thread_index)
{
session_update_dispatch_period (session_manager_worker_t * wrk, f64 now,
u32 thread_index)
{
- f64 sample, prev_period = wrk->dispatch_period, a = 0.8;
-
- sample = now - wrk->last_vlib_time;
- wrk->dispatch_period = a * sample + (1 - a) * prev_period;
+ if (wrk->last_tx_packets > 8)
+ {
+ f64 sample = now - wrk->last_vlib_time;
+ sample = (sample * wrk->last_tx_packets) / VLIB_FRAME_SIZE;
+ wrk->dispatch_period = (wrk->dispatch_period + sample) * 0.5;
+ }
wrk->last_vlib_time = now;
}
wrk->last_vlib_time = now;
}
_vec_len (fifo_events) = 0;
wrk->free_event_vector = fifo_events;
_vec_len (fifo_events) = 0;
wrk->free_event_vector = fifo_events;
+ wrk->last_tx_packets = n_tx_packets;
vlib_node_increment_counter (vm, session_queue_node.index,
SESSION_QUEUE_ERROR_TX, n_tx_packets);
vlib_node_increment_counter (vm, session_queue_node.index,
SESSION_QUEUE_ERROR_TX, n_tx_packets);
-transport_connection_tx_pacer_init (transport_connection_t * tc,
- u32 rate_bytes_per_sec,
- u32 initial_bucket)
+transport_connection_tx_pacer_reset (transport_connection_t * tc,
+ u32 rate_bytes_per_sec,
+ u32 start_bucket, u64 time_now)
- vlib_main_t *vm = vlib_get_main ();
- u64 time_now = vm->clib_time.last_cpu_time;
spacer_t *pacer = &tc->pacer;
f64 dispatch_period;
u32 burst_size;
spacer_t *pacer = &tc->pacer;
f64 dispatch_period;
u32 burst_size;
- tc->flags |= TRANSPORT_CONNECTION_F_IS_TX_PACED;
dispatch_period = transport_dispatch_period (tc->thread_index);
burst_size = rate_bytes_per_sec * dispatch_period;
spacer_update_max_burst_size (&tc->pacer, burst_size);
spacer_set_pace_rate (&tc->pacer, rate_bytes_per_sec);
pacer->last_update = time_now >> SPACER_CPU_TICKS_PER_PERIOD_SHIFT;
dispatch_period = transport_dispatch_period (tc->thread_index);
burst_size = rate_bytes_per_sec * dispatch_period;
spacer_update_max_burst_size (&tc->pacer, burst_size);
spacer_set_pace_rate (&tc->pacer, rate_bytes_per_sec);
pacer->last_update = time_now >> SPACER_CPU_TICKS_PER_PERIOD_SHIFT;
- pacer->bucket = initial_bucket;
+ pacer->bucket = start_bucket;
+}
+
+void
+transport_connection_tx_pacer_init (transport_connection_t * tc,
+ u32 rate_bytes_per_sec,
+ u32 initial_bucket)
+{
+ vlib_main_t *vm = vlib_get_main ();
+ tc->flags |= TRANSPORT_CONNECTION_F_IS_TX_PACED;
+ transport_connection_tx_pacer_reset (tc, rate_bytes_per_sec,
+ initial_bucket,
+ vm->clib_time.last_cpu_time);
void transport_update_time (f64 time_now, u8 thread_index);
void transport_enable_disable (vlib_main_t * vm, u8 is_en);
void transport_update_time (f64 time_now, u8 thread_index);
void transport_enable_disable (vlib_main_t * vm, u8 is_en);
+void transport_connection_tx_pacer_reset (transport_connection_t * tc,
+ u32 rate_bytes_per_sec,
+ u32 initial_bucket, u64 time_now);
/**
* Initialize tx pacer for connection
*
/**
* Initialize tx pacer for connection
*
-tcp_update_pacer (tcp_connection_t * tc)
+tcp_connection_tx_pacer_update (tcp_connection_t * tc)
((f64) tc->cwnd) / srtt);
}
((f64) tc->cwnd) / srtt);
}
+void
+tcp_connection_tx_pacer_reset (tcp_connection_t * tc, u32 window,
+ u32 start_bucket)
+{
+ tcp_worker_ctx_t *wrk = tcp_get_worker (tc->c_thread_index);
+ u32 byte_rate = window / ((f64) TCP_TICK * tc->srtt);
+ u64 last_time = wrk->vm->clib_time.last_cpu_time;
+ transport_connection_tx_pacer_reset (&tc->connection, byte_rate,
+ start_bucket, last_time);
+}
+
static void
tcp_timer_keep_handler (u32 conn_index)
{
static void
tcp_timer_keep_handler (u32 conn_index)
{
void tcp_connection_timers_reset (tcp_connection_t * tc);
void tcp_init_snd_vars (tcp_connection_t * tc);
void tcp_connection_init_vars (tcp_connection_t * tc);
void tcp_connection_timers_reset (tcp_connection_t * tc);
void tcp_init_snd_vars (tcp_connection_t * tc);
void tcp_connection_init_vars (tcp_connection_t * tc);
-void tcp_update_pacer (tcp_connection_t * tc);
+void tcp_connection_tx_pacer_update (tcp_connection_t * tc);
+void tcp_connection_tx_pacer_reset (tcp_connection_t * tc, u32 window,
+ u32 start_bucket);
always_inline void
tcp_cc_rcv_ack (tcp_connection_t * tc)
{
tc->cc_algo->rcv_ack (tc);
tc->tsecr_last_ack = tc->rcv_opts.tsecr;
always_inline void
tcp_cc_rcv_ack (tcp_connection_t * tc)
{
tc->cc_algo->rcv_ack (tc);
tc->tsecr_last_ack = tc->rcv_opts.tsecr;
+ tcp_connection_tx_pacer_update (tc);
tcp_fastrecovery_1_smss_off (tc);
tcp_fastrecovery_first_off (tc);
tcp_fastrecovery_1_smss_off (tc);
tcp_fastrecovery_first_off (tc);
- /* Update pacer because our cwnd changed. Also makes sure
- * that we recompute the max burst size */
- tcp_update_pacer (tc);
-
TCP_EVT_DBG (TCP_EVT_CC_EVT, tc, 3);
}
TCP_EVT_DBG (TCP_EVT_CC_EVT, tc, 3);
}
}
else if (tcp_should_fastrecover (tc))
{
}
else if (tcp_should_fastrecover (tc))
{
ASSERT (!tcp_in_fastrecovery (tc));
/* Heuristic to catch potential late dupacks
ASSERT (!tcp_in_fastrecovery (tc));
/* Heuristic to catch potential late dupacks
tc->cwnd = tc->ssthresh + 3 * tc->snd_mss;
}
tc->cwnd = tc->ssthresh + 3 * tc->snd_mss;
}
- byte_rate = (0.3 * tc->cwnd) / ((f64) TCP_TICK * tc->srtt);
- transport_connection_tx_pacer_init (&tc->connection, byte_rate, 0);
+ pacer_wnd = clib_max (0.1 * tc->cwnd, 2 * tc->snd_mss);
+ tcp_connection_tx_pacer_reset (tc, pacer_wnd,
+ 0 /* start bucket */ );
tcp_program_fastretransmit (tcp_get_worker (tc->c_thread_index),
tc);
return;
tcp_program_fastretransmit (tcp_get_worker (tc->c_thread_index),
tc);
return;
tc->snd_congestion = tc->snd_una_max;
tc->rtt_ts = 0;
tc->cwnd_acc_bytes = 0;
tc->snd_congestion = tc->snd_una_max;
tc->rtt_ts = 0;
tc->cwnd_acc_bytes = 0;
+ tcp_connection_tx_pacer_reset (tc, tc->cwnd, 2 * tc->snd_mss);