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5264ab612e
The test sends packets and compares enqueue, transmit and Ack timestamps with expected values. It installs netem delays to increase latency between these points. The test proves flaky in virtual environment (vng). Increase the delays to reduce variance. Scale measurement tolerance accordingly. Time sensitive tests are difficult to calibrate. Increasing delays 10x also increases runtime 10x, for one. And it may still prove flaky at some rate. Signed-off-by: Willem de Bruijn <willemb@google.com> Reviewed-by: Simon Horman <horms@kernel.org> Link: https://lore.kernel.org/r/20240127023212.3746239-1-willemdebruijn.kernel@gmail.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
84 lines
1.7 KiB
Bash
Executable file
84 lines
1.7 KiB
Bash
Executable file
#!/bin/bash
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# SPDX-License-Identifier: GPL-2.0
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#
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# Send packets with transmit timestamps over loopback with netem
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# Verify that timestamps correspond to netem delay
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set -e
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setup() {
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# set 1ms delay on lo egress
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tc qdisc add dev lo root netem delay 10ms
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# set 2ms delay on ifb0 egress
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modprobe ifb
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ip link add ifb_netem0 type ifb
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ip link set dev ifb_netem0 up
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tc qdisc add dev ifb_netem0 root netem delay 20ms
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# redirect lo ingress through ifb0 egress
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tc qdisc add dev lo handle ffff: ingress
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tc filter add dev lo parent ffff: \
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u32 match mark 0 0xffff \
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action mirred egress redirect dev ifb_netem0
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}
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run_test_v4v6() {
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# SND will be delayed 10ms
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# ACK will be delayed 60ms: 10 + 20 ms round-trip
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# allow +/- tolerance of 8ms
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# wait for ACK to be queued
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local -r args="$@ -v 10000 -V 60000 -t 8000 -S 80000"
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./txtimestamp ${args} -4 -L 127.0.0.1
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./txtimestamp ${args} -6 -L ::1
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}
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run_test_tcpudpraw() {
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local -r args=$@
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run_test_v4v6 ${args} # tcp
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run_test_v4v6 ${args} -u # udp
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run_test_v4v6 ${args} -r # raw
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run_test_v4v6 ${args} -R # raw (IPPROTO_RAW)
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run_test_v4v6 ${args} -P # pf_packet
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}
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run_test_all() {
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setup
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run_test_tcpudpraw # setsockopt
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run_test_tcpudpraw -C # cmsg
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run_test_tcpudpraw -n # timestamp w/o data
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echo "OK. All tests passed"
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}
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run_test_one() {
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setup
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./txtimestamp $@
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}
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usage() {
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echo "Usage: $0 [ -r | --run ] <txtimestamp args> | [ -h | --help ]"
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echo " (no args) Run all tests"
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echo " -r|--run Run an individual test with arguments"
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echo " -h|--help Help"
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}
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main() {
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if [[ $# -eq 0 ]]; then
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run_test_all
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else
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if [[ "$1" = "-r" || "$1" == "--run" ]]; then
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shift
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run_test_one $@
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else
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usage
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fi
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fi
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}
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if [[ -z "$(ip netns identify)" ]]; then
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./in_netns.sh $0 $@
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else
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main $@
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fi
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