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| author |   Eric Dumazet <edumazet@google.com> | 2018-09-21 08:51:46 -0700 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2018-09-21 19:37:59 -0700 |
| commit | 72b0094f918294e6cb8cf5c3b4520d928fbb1a57 (patch) | |
| tree | d654b14a3f6b48816a2f3416f9632648e2de8fde | |
| parent | Merge branch 'hns3-next' (diff) | |
| download | linux-dev-72b0094f918294e6cb8cf5c3b4520d928fbb1a57.tar.xz linux-dev-72b0094f918294e6cb8cf5c3b4520d928fbb1a57.zip | |
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 25db26a91364 ("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>
| -rw-r--r-- | include/net/tcp.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/net/tcp.h b/include/net/tcp.h index 770917d0caa7..c6f0bc1dc678 100644 --- a/include/net/tcp.h +++ b/include/net/tcp.h @@ -732,7 +732,7 @@ void tcp_send_window_probe(struct sock *sk); static inline u64 tcp_clock_ns(void) { - return local_clock(); + return ktime_get_tai_ns(); } static inline u64 tcp_clock_us(void) |