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tcp: use tcp_jiffies32 to feed tp->lsndtime 

Use tcp_jiffies32 instead of tcp_time_stamp to feed
tp->lsndtime.

tcp_time_stamp will soon be a litle bit more expensive
than simply reading 'jiffies'.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Acked-by: Soheil Hassas Yeganeh <soheil@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2017-05-16 14:00:03 -07:00 committed by David S. Miller
parent d011b9a448
commit d635fbe27e
6 changed files with 9 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
include/net/tcp.h
View File

@ -1245,7 +1245,7 @@ static inline void tcp_slow_start_after_idle_check(struct sock *sk)
if (!sysctl_tcp_slow_start_after_idle || tp->packets_out ||
ca_ops->cong_control)
return;
delta = tcp_time_stamp - tp->lsndtime;
delta = tcp_jiffies32 - tp->lsndtime;
if (delta > inet_csk(sk)->icsk_rto)
tcp_cwnd_restart(sk, delta);
}

2
net/ipv4/tcp.c
View File

@ -2841,7 +2841,7 @@ void tcp_get_info(struct sock *sk, struct tcp_info *info)
info->tcpi_retrans = tp->retrans_out;
info->tcpi_fackets = tp->fackets_out;
now = tcp_time_stamp;
now = tcp_jiffies32;
info->tcpi_last_data_sent = jiffies_to_msecs(now - tp->lsndtime);
info->tcpi_last_data_recv = jiffies_to_msecs(now - icsk->icsk_ack.lrcvtime);
info->tcpi_last_ack_recv = jiffies_to_msecs(now - tp->rcv_tstamp);

2
net/ipv4/tcp_cubic.c
View File

@ -155,7 +155,7 @@ static void bictcp_cwnd_event(struct sock *sk, enum tcp_ca_event event)
{
if (event == CA_EVENT_TX_START) {
struct bictcp *ca = inet_csk_ca(sk);
u32 now = tcp_time_stamp;
u32 now = tcp_jiffies32;
s32 delta;
delta = now - tcp_sk(sk)->lsndtime;

4
net/ipv4/tcp_input.c
View File

@ -5571,7 +5571,7 @@ void tcp_finish_connect(struct sock *sk, struct sk_buff *skb)
/* Prevent spurious tcp_cwnd_restart() on first data
* packet.
*/
tp->lsndtime = tcp_time_stamp;
tp->lsndtime = tcp_jiffies32;
tcp_init_buffer_space(sk);
@ -6008,7 +6008,7 @@ int tcp_rcv_state_process(struct sock *sk, struct sk_buff *skb)
tcp_update_pacing_rate(sk);
/* Prevent spurious tcp_cwnd_restart() on first data packet */
tp->lsndtime = tcp_time_stamp;
tp->lsndtime = tcp_jiffies32;
tcp_initialize_rcv_mss(sk);
tcp_fast_path_on(tp);

4
net/ipv4/tcp_output.c
View File

@ -160,7 +160,7 @@ static void tcp_event_data_sent(struct tcp_sock *tp,
struct sock *sk)
{
struct inet_connection_sock *icsk = inet_csk(sk);
const u32 now = tcp_time_stamp;
const u32 now = tcp_jiffies32;
if (tcp_packets_in_flight(tp) == 0)
tcp_ca_event(sk, CA_EVENT_TX_START);
@ -1918,7 +1918,7 @@ static bool tcp_tso_should_defer(struct sock *sk, struct sk_buff *skb,
/* Avoid bursty behavior by allowing defer
* only if the last write was recent.
*/
if ((s32)(tcp_time_stamp - tp->lsndtime) > 0)
if ((s32)(tcp_jiffies32 - tp->lsndtime) > 0)
goto send_now;
in_flight = tcp_packets_in_flight(tp);

4
net/ipv4/tcp_timer.c
View File

@ -63,7 +63,7 @@ static int tcp_out_of_resources(struct sock *sk, bool do_reset)
/* If peer does not open window for long time, or did not transmit
* anything for long time, penalize it. */
if ((s32)(tcp_time_stamp - tp->lsndtime) > 2*TCP_RTO_MAX || !do_reset)
if ((s32)(tcp_jiffies32 - tp->lsndtime) > 2*TCP_RTO_MAX || !do_reset)
shift++;
/* If some dubious ICMP arrived, penalize even more. */
@ -73,7 +73,7 @@ static int tcp_out_of_resources(struct sock *sk, bool do_reset)
if (tcp_check_oom(sk, shift)) {
/* Catch exceptional cases, when connection requires reset.
* 1. Last segment was sent recently. */
if ((s32)(tcp_time_stamp - tp->lsndtime) <= TCP_TIMEWAIT_LEN ||
if ((s32)(tcp_jiffies32 - tp->lsndtime) <= TCP_TIMEWAIT_LEN ||
/* 2. Window is closed. */
(!tp->snd_wnd && !tp->packets_out))
do_reset = true;