From: Martin KaFai Lau <kafai@fb.com>
To: <netdev@vger.kernel.org>
Cc: Eric Dumazet <edumazet@google.com>,
Neal Cardwell <ncardwell@google.com>,
Soheil Hassas Yeganeh <soheil@google.com>,
Willem de Bruijn <willemb@google.com>,
Yuchung Cheng <ycheng@google.com>,
Kernel Team <kernel-team@fb.com>
Subject: [PATCH net-next 2/2] tcp: Merge txstamp_ack in tcp_skb_collapse_tstamp
Date: Tue, 19 Apr 2016 22:50:48 -0700 [thread overview]
Message-ID: <1461131448-1460418-3-git-send-email-kafai@fb.com> (raw)
In-Reply-To: <1461131448-1460418-1-git-send-email-kafai@fb.com>
When collapsing skbs, txstamp_ack also needs to be merged.
Retrans Collapse Test:
~~~~~~
0.200 accept(3, ..., ...) = 4
+0 setsockopt(4, SOL_TCP, TCP_NODELAY, [1], 4) = 0
0.200 write(4, ..., 730) = 730
+0 setsockopt(4, SOL_SOCKET, 37, [2688], 4) = 0
0.200 write(4, ..., 730) = 730
+0 setsockopt(4, SOL_SOCKET, 37, [2176], 4) = 0
0.200 write(4, ..., 11680) = 11680
0.200 > P. 1:731(730) ack 1
0.200 > P. 731:1461(730) ack 1
0.200 > . 1461:8761(7300) ack 1
0.200 > P. 8761:13141(4380) ack 1
0.300 < . 1:1(0) ack 1 win 257 <sack 1461:2921,nop,nop>
0.300 < . 1:1(0) ack 1 win 257 <sack 1461:4381,nop,nop>
0.300 < . 1:1(0) ack 1 win 257 <sack 1461:5841,nop,nop>
0.300 > P. 1:1461(1460) ack 1
0.400 < . 1:1(0) ack 13141 win 257
BPF Output Before:
~~~~~
<No output due to missing SCM_TSTAMP_ACK timestamp>
BPF Output After:
~~~~~
<...>-2027 [007] d.s. 79.765921: : ee_data:1459
Sacks Collapse Test:
~~~~~
0.200 accept(3, ..., ...) = 4
+0 setsockopt(4, SOL_TCP, TCP_NODELAY, [1], 4) = 0
0.200 write(4, ..., 1460) = 1460
+0 setsockopt(4, SOL_SOCKET, 37, [2688], 4) = 0
0.200 write(4, ..., 13140) = 13140
+0 setsockopt(4, SOL_SOCKET, 37, [2176], 4) = 0
0.200 > P. 1:1461(1460) ack 1
0.200 > . 1461:8761(7300) ack 1
0.200 > P. 8761:14601(5840) ack 1
0.300 < . 1:1(0) ack 1 win 257 <sack 1461:14601,nop,nop>
0.300 > P. 1:1461(1460) ack 1
0.400 < . 1:1(0) ack 14601 win 257
BPF Output Before:
~~~~~
<No output due to missing SCM_TSTAMP_ACK timestamp>
BPF Output After:
~~~~~
<...>-2049 [007] d.s. 89.185538: : ee_data:14599
Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Neal Cardwell <ncardwell@google.com>
Cc: Soheil Hassas Yeganeh <soheil@google.com>
Cc: Willem de Bruijn <willemb@google.com>
Cc: Yuchung Cheng <ycheng@google.com>
---
net/ipv4/tcp_output.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c
index f7c3bc0..a6e4a83 100644
--- a/net/ipv4/tcp_output.c
+++ b/net/ipv4/tcp_output.c
@@ -2454,6 +2454,8 @@ void tcp_skb_collapse_tstamp(struct sk_buff *skb,
shinfo->tx_flags |= tsflags;
shinfo->tskey = next_shinfo->tskey;
+ TCP_SKB_CB(skb)->txstamp_ack |=
+ TCP_SKB_CB(next_skb)->txstamp_ack;
}
}
--
2.5.1
next prev parent reply other threads:[~2016-04-20 5:51 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-04-20 5:50 [PATCH net-next 0/2] tcp: Handle txstamp_ack when fragmenting/coalescing skbs Martin KaFai Lau
2016-04-20 5:50 ` [PATCH net-next 1/2] tcp: Carry txstamp_ack in tcp_fragment_tstamp Martin KaFai Lau
2016-04-20 19:15 ` Soheil Hassas Yeganeh
2016-04-21 19:45 ` Willem de Bruijn
2016-04-20 5:50 ` Martin KaFai Lau [this message]
2016-04-20 19:15 ` [PATCH net-next 2/2] tcp: Merge txstamp_ack in tcp_skb_collapse_tstamp Soheil Hassas Yeganeh
2016-04-21 18:52 ` [PATCH net-next 0/2] tcp: Handle txstamp_ack when fragmenting/coalescing skbs David Miller
2016-04-24 18:07 ` David Miller
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