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tcp: switch tcp_clock_ns() to CLOCK_TAI base
TCP pacing is either implemented in sch_fq or internally.
We have the goal of being able to offload pacing on the NICS.
TCP will soon provide per skb skb->tstamp as early departure time.
Like ETF in commit 25db26a913
("net/sched: Introduce the ETF Qdisc")
we chose CLOCK_T as the clock base, so that TCP and pacers can share
a common clock, to get better RTT samples (without pacing artificially
inflating these samples).
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -732,7 +732,7 @@ void tcp_send_window_probe(struct sock *sk);
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static inline u64 tcp_clock_ns(void)
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{
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return local_clock();
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return ktime_get_tai_ns();
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}
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static inline u64 tcp_clock_us(void)
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