tcp: Increase the initial congestion window to 10.
Signed-off-by: David S. Miller <davem@davemloft.net> Acked-by: Nandita Dukkipati <nanditad@google.com>
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@ -196,6 +196,9 @@ extern void tcp_time_wait(struct sock *sk, int state, int timeo);
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/* TCP thin-stream limits */
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#define TCP_THIN_LINEAR_RETRIES 6 /* After 6 linear retries, do exp. backoff */
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/* TCP initial congestion window */
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#define TCP_INIT_CWND 10
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extern struct inet_timewait_death_row tcp_death_row;
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/* sysctl variables for tcp */
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@ -799,15 +802,6 @@ static inline __u32 tcp_current_ssthresh(const struct sock *sk)
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/* Use define here intentionally to get WARN_ON location shown at the caller */
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#define tcp_verify_left_out(tp) WARN_ON(tcp_left_out(tp) > tp->packets_out)
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/*
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* Convert RFC 3390 larger initial window into an equivalent number of packets.
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* This is based on the numbers specified in RFC 5681, 3.1.
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*/
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static inline u32 rfc3390_bytes_to_packets(const u32 smss)
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{
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return smss <= 1095 ? 4 : (smss > 2190 ? 2 : 3);
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}
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extern void tcp_enter_cwr(struct sock *sk, const int set_ssthresh);
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extern __u32 tcp_init_cwnd(struct tcp_sock *tp, struct dst_entry *dst);
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@ -583,6 +583,15 @@ done:
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dccp_ackvec_parsed_cleanup(&hc->tx_av_chunks);
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}
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/*
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* Convert RFC 3390 larger initial window into an equivalent number of packets.
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* This is based on the numbers specified in RFC 5681, 3.1.
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*/
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static inline u32 rfc3390_bytes_to_packets(const u32 smss)
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{
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return smss <= 1095 ? 4 : (smss > 2190 ? 2 : 3);
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}
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static int ccid2_hc_tx_init(struct ccid *ccid, struct sock *sk)
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{
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struct ccid2_hc_tx_sock *hc = ccid_priv(ccid);
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@ -817,7 +817,7 @@ __u32 tcp_init_cwnd(struct tcp_sock *tp, struct dst_entry *dst)
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__u32 cwnd = (dst ? dst_metric(dst, RTAX_INITCWND) : 0);
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if (!cwnd)
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cwnd = rfc3390_bytes_to_packets(tp->mss_cache);
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cwnd = TCP_INIT_CWND;
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return min_t(__u32, cwnd, tp->snd_cwnd_clamp);
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}
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