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e874be276e
Same import process as previous tests.
Also add CONFIG_NET_SCH_FQ to config, as one test uses that.
Same test process as previous tests. Both with and without debug mode.
Recording the steps once:
make mrproper
vng --build \
--config tools/testing/selftests/net/packetdrill/config \
--config kernel/configs/debug.config
vng -v --run . --user root --cpus 4 -- \
make -C tools/testing/selftests TARGETS=net/packetdrill run_tests
Link: https://github.com/linux-netdev/nipa/wiki/How-to-run-netdev-selftests-CI-style#how-to-build
Signed-off-by: Willem de Bruijn <willemb@google.com>
Acked-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Link: https://patch.msgid.link/20240912005317.1253001-4-willemdebruijn.kernel@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
57 lines
1.6 KiB
Plaintext
57 lines
1.6 KiB
Plaintext
// SPDX-License-Identifier: GPL-2.0
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// Test of slow start when not application-limited, so that
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// the cwnd continues to grow.
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// In this variant, the receiver ACKs every packet.
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// Set up config. To keep things simple, disable the
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// mechanism that defers sending in order to send bigger TSO packets.
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`./defaults.sh
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sysctl -q net.ipv4.tcp_tso_win_divisor=100`
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0 socket(..., SOCK_STREAM, IPPROTO_TCP) = 3
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+0 setsockopt(3, SOL_SOCKET, SO_REUSEADDR, [1], 4) = 0
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+0 bind(3, ..., ...) = 0
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+0 listen(3, 1) = 0
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+.1 < S 0:0(0) win 32792 <mss 1000,sackOK,nop,nop,nop,wscale 7>
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+0 > S. 0:0(0) ack 1 <mss 1460,nop,nop,sackOK,nop,wscale 8>
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+.1 < . 1:1(0) ack 1 win 257
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+0 accept(3, ..., ...) = 4
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+0 setsockopt(4, SOL_SOCKET, SO_SNDBUF, [200000], 4) = 0
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+0 write(4, ..., 30000) = 30000
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+0 > P. 1:10001(10000) ack 1
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+0 %{ assert tcpi_snd_cwnd == 10, tcpi_snd_cwnd }%
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+.105 < . 1:1(0) ack 1001 win 257
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+0 > P. 10001:12001(2000) ack 1
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+0 < . 1:1(0) ack 2001 win 257
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+0 > P. 12001:14001(2000) ack 1
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+.005 < . 1:1(0) ack 3001 win 257
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+0 > P. 14001:16001(2000) ack 1
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+0 < . 1:1(0) ack 4001 win 257
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+0 > P. 16001:18001(2000) ack 1
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+.005 < . 1:1(0) ack 5001 win 257
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+0 > P. 18001:20001(2000) ack 1
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+0 < . 1:1(0) ack 6001 win 257
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+0 > P. 20001:22001(2000) ack 1
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+.005 < . 1:1(0) ack 7001 win 257
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+0 > P. 22001:24001(2000) ack 1
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+0 < . 1:1(0) ack 8001 win 257
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+0 > P. 24001:26001(2000) ack 1
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+.005 < . 1:1(0) ack 9001 win 257
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+0 > P. 26001:28001(2000) ack 1
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+0 < . 1:1(0) ack 10001 win 257
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+0 > P. 28001:30001(2000) ack 1
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+0 %{ assert tcpi_snd_cwnd == 20, tcpi_snd_cwnd }%
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