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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>
This commit is contained in:
Eric Dumazet 2018-09-21 08:51:46 -07:00 committed by David S. Miller
parent 4f4b93a88c
commit 72b0094f91
1 changed files with 1 additions and 1 deletions
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2
include/net/tcp.h
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@ -732,7 +732,7 @@ void tcp_send_window_probe(struct sock *sk);
static inline u64 tcp_clock_ns(void) static inline u64 tcp_clock_ns(void)
{ {
return local_clock(); return ktime_get_tai_ns();
} }
static inline u64 tcp_clock_us(void) static inline u64 tcp_clock_us(void)