diff options
| author |   Jianfeng Tan <henry.tjf@antfin.com> | 2019-11-18 06:59:50 +0000 |
|---|---|---|
| committer | Jianfeng Tan <henry.tjf@antfin.com> | 2020-03-05 01:31:33 +0800 |
| commit | 78c896b3b3127515478090c19447e27dc406427e (patch) | |
| tree | d6d67d4683e9ca0409f9984a834547a572fb5310 /test/packetdrill/tests/linux/fast_recovery/prr-ss-ack-below-snd_una-reno.pkt | |
| parent | e4380f4866091fd92a7a57667dd938a99144f9cd (diff) | |
TLDKv2dev-next-socket
Signed-off-by: Jianfeng Tan <henry.tjf@antfin.com>
Signed-off-by: Jielong Zhou <jielong.zjl@antfin.com>
Signed-off-by: Jian Zhang <wuzai.zj@antfin.com>
Signed-off-by: Chen Zhao <winters.zc@antfin.com>
Change-Id: I55c39de4c6cd30f991f35631eb507f770230f08e
Diffstat (limited to 'test/packetdrill/tests/linux/fast_recovery/prr-ss-ack-below-snd_una-reno.pkt')
| -rw-r--r-- | test/packetdrill/tests/linux/fast_recovery/prr-ss-ack-below-snd_una-reno.pkt | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/test/packetdrill/tests/linux/fast_recovery/prr-ss-ack-below-snd_una-reno.pkt b/test/packetdrill/tests/linux/fast_recovery/prr-ss-ack-below-snd_una-reno.pkt new file mode 100644 index 0000000..4cc7b3b --- /dev/null +++ b/test/packetdrill/tests/linux/fast_recovery/prr-ss-ack-below-snd_una-reno.pkt @@ -0,0 +1,51 @@ +// Test PRR-slowstart implementation. +// In this variant we verify that the sender uses SACK info on an ACK +// below snd_una. +// This variant tests behavior with Reno congestion control. + +`sysctl -q net.ipv4.tcp_congestion_control=reno` + +// Establish a connection. +0.000 socket(..., SOCK_STREAM, IPPROTO_TCP) = 3 +0.000 setsockopt(3, SOL_SOCKET, SO_REUSEADDR, [1], 4) = 0 +0.000 bind(3, ..., ...) = 0 +0.000 listen(3, 1) = 0 + +0.100 < S 0:0(0) win 32792 <mss 1000,sackOK,nop,nop,nop,wscale 7> +0.100 > S. 0:0(0) ack 1 <mss 1460,nop,nop,sackOK,nop,wscale 6> +// RTT 100ms +0.200 < . 1:1(0) ack 1 win 320 +0.200 accept(3, ..., ...) = 4 + +// Send 10 data segments. +0.200 write(4, ..., 10000) = 10000 +0.200 > P. 1:10001(10000) ack 1 + +// Lost packet 1:1001,4001:5001,7001:8001. +// Lots of reordering in both directions. +0.310 < . 1:1(0) ack 1 win 320 <sack 1001:2001,nop,nop> +0.320 < . 1:1(0) ack 1 win 320 <sack 1001:3001,nop,nop> +0.330 < . 1:1(0) ack 1 win 320 <sack 1001:3001 8001:9001,nop,nop> +// Enter fast recovery. +0.330 > . 1:1001(1000) ack 1 +0.330 > . 3001:4001(1000) ack 1 + +// An ACK advances snd_una. +0.440 < . 1:1(0) ack 4001 win 320 <sack 8001:9001,nop,nop> +0.440 > . 4001:5001(1000) ack 1 +0.440 > . 5001:6001(1000) ack 1 + +// The following ACK was reordered - delayed so that it arrives with +// an ACK field below snd_una. Here we check that the newly-SACKed +// 2MSS at 5001:7001 cause us to send out 1 more MSS. +0.450 < . 1:1(0) ack 3001 win 320 <sack 5001:7001,nop,nop> +0.450 > . 7001:8001(1000) ack 1 + +// Receiver ACKs all data. +0.560 < . 1:1(0) ack 10001 win 320 + +// Write another 10 MSS, of which 5MSS (cwnd=ssthresh) should go out: +0.600 write(4, ..., 10000) = 10000 +0.600 > . 10001:15001(5000) ack 1 + +0.700 `sysctl -q net.ipv4.tcp_congestion_control=cubic` |