net/ipv4/tcp_rate.c

42 	struct tcp_sock *tp = tcp_sk(sk);
52 	  * Note that we use packets_out instead of tcp_packets_in_flight(tp)
58 	if (!tp->packets_out) {
61 		tp->first_tx_mstamp  = tstamp_us;
62 		tp->delivered_mstamp = tstamp_us;
65 	TCP_SKB_CB(skb)->tx.first_tx_mstamp	= tp->first_tx_mstamp;
66 	TCP_SKB_CB(skb)->tx.delivered_mstamp	= tp->delivered_mstamp;
67 	TCP_SKB_CB(skb)->tx.delivered		= tp->delivered;
68 	TCP_SKB_CB(skb)->tx.delivered_ce	= tp->delivered_ce;
69 	TCP_SKB_CB(skb)->tx.is_app_limited	= tp->app_limited ? 1 : 0;
83 	struct tcp_sock *tp = tcp_sk(sk);
92 	    tcp_skb_sent_after(tx_tstamp, tp->first_tx_mstamp,
102 		tp->first_tx_mstamp  = tx_tstamp;
104 		rs->interval_us = tcp_stamp_us_delta(tp->first_tx_mstamp,
120 	struct tcp_sock *tp = tcp_sk(sk);
124 	if (tp->app_limited && after(tp->delivered, tp->app_limited))
125 		tp->app_limited = 0;
132 		tp->delivered_mstamp = tp->tcp_mstamp;
146 	rs->delivered   = tp->delivered - rs->prior_delivered;
148 	rs->delivered_ce = tp->delivered_ce - rs->prior_delivered_ce;
158 	ack_us = tcp_stamp_us_delta(tp->tcp_mstamp,
173 	if (unlikely(rs->interval_us < tcp_min_rtt(tp))) {
178 				 tp->rx_opt.sack_ok, tcp_min_rtt(tp));
185 	    ((u64)rs->delivered * tp->rate_interval_us >=
186 	     (u64)tp->rate_delivered * rs->interval_us)) {
187 		tp->rate_delivered = rs->delivered;
188 		tp->rate_interval_us = rs->interval_us;
189 		tp->rate_app_limited = rs->is_app_limited;
196 	struct tcp_sock *tp = tcp_sk(sk);
199 	    tp->write_seq - tp->snd_nxt < tp->mss_cache &&
203 	    tcp_packets_in_flight(tp) < tcp_snd_cwnd(tp) &&
205 	    tp->lost_out <= tp->retrans_out)
206 		tp->app_limited =
207 			(tp->delivered + tcp_packets_in_flight(tp)) ? : 1;