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 <eduma...@google.com>
---
include/net/tcp.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/net/tcp.h b/include/net/tcp.h
index
770917d0caa71896b6adac06a62b150bfdc72836..c6f0bc1dc6782a1976c06932e846b3f6d708ba9f
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)
--
2.19.0.444.g18242da7ef-goog
