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61a00b196a
QOS tests create congestion and verify the switch behavior. To create congestion, they need to have more traffic than the port can handle, so some of them force 1Gbps speed. The tests assume that 1Gbps speed is supported, otherwise, they will fail. Spectrum-4 ASIC will not support this speed in all ports, so to be able to run the tests there, some adjustments are required. Use shapers to limit the traffic instead of forcing speed. Note that for several ports, the speed configuration is just for autoneg issues, so shaper is not needed instead. The tests already use ETS qdisc as a root and RED qdiscs as children. Add a new TBF shaper to limit the rate of traffic, and use it as a root qdisc, then save the previous hierarchy of qdiscs under the new TBF root. In some ASICs, the shapers do not limit the traffic as accurately as forcing speed. To make the tests stable, allow the backlog size to be up to +-10% of the threshold. The aim of the tests is to make sure that with backlog << threshold, there are no drops, and that packets are dropped somewhere in vicinity of the configured threshold. Signed-off-by: Amit Cohen <amcohen@nvidia.com> Reviewed-by: Petr Machata <petrm@nvidia.com> Signed-off-by: Petr Machata <petrm@nvidia.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
177 lines
3.0 KiB
Bash
Executable File
177 lines
3.0 KiB
Bash
Executable File
#!/bin/bash
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# SPDX-License-Identifier: GPL-2.0
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ALL_TESTS="
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ping_ipv4
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ecn_test
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ecn_test_perband
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ecn_nodrop_test
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red_test
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mc_backlog_test
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red_mirror_test
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red_trap_test
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ecn_mirror_test
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"
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: ${QDISC:=ets}
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source sch_red_core.sh
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# do_ecn_test first build 2/3 of the requested backlog and expects no marking,
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# and then builds 3/2 of it and does expect marking. The values of $BACKLOG1 and
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# $BACKLOG2 are far enough not to overlap, so that we can assume that if we do
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# see (do not see) marking, it is actually due to the configuration of that one
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# TC, and not due to configuration of the other TC leaking over.
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BACKLOG1=200000
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BACKLOG2=500000
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install_root_qdisc()
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{
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tc qdisc add dev $swp3 parent 1: handle 10: $QDISC \
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bands 8 priomap 7 6 5 4 3 2 1 0
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}
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install_qdisc_tc0()
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{
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local -a args=("$@")
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tc qdisc add dev $swp3 parent 10:8 handle 108: red \
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limit 1000000 min $BACKLOG1 max $((BACKLOG1 + 1)) \
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probability 1.0 avpkt 8000 burst 38 "${args[@]}"
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}
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install_qdisc_tc1()
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{
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local -a args=("$@")
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tc qdisc add dev $swp3 parent 10:7 handle 107: red \
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limit 1000000 min $BACKLOG2 max $((BACKLOG2 + 1)) \
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probability 1.0 avpkt 8000 burst 63 "${args[@]}"
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}
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install_qdisc()
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{
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install_root_qdisc
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install_qdisc_tc0 "$@"
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install_qdisc_tc1 "$@"
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sleep 1
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}
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uninstall_qdisc_tc0()
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{
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tc qdisc del dev $swp3 parent 10:8
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}
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uninstall_qdisc_tc1()
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{
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tc qdisc del dev $swp3 parent 10:7
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}
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uninstall_root_qdisc()
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{
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tc qdisc del dev $swp3 parent 1:
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}
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uninstall_qdisc()
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{
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uninstall_qdisc_tc0
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uninstall_qdisc_tc1
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uninstall_root_qdisc
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}
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ecn_test()
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{
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install_qdisc ecn
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do_ecn_test 10 $BACKLOG1
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do_ecn_test 11 $BACKLOG2
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uninstall_qdisc
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}
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ecn_test_perband()
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{
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install_qdisc ecn
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do_ecn_test_perband 10 $BACKLOG1
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do_ecn_test_perband 11 $BACKLOG2
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uninstall_qdisc
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}
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ecn_nodrop_test()
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{
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install_qdisc ecn nodrop
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do_ecn_nodrop_test 10 $BACKLOG1
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do_ecn_nodrop_test 11 $BACKLOG2
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uninstall_qdisc
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}
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red_test()
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{
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install_qdisc
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# Make sure that we get the non-zero value if there is any.
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local cur=$(busywait 1100 until_counter_is "> 0" \
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qdisc_stats_get $swp3 10: .backlog)
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(( cur == 0 ))
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check_err $? "backlog of $cur observed on non-busy qdisc"
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log_test "$QDISC backlog properly cleaned"
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do_red_test 10 $BACKLOG1
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do_red_test 11 $BACKLOG2
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uninstall_qdisc
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}
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mc_backlog_test()
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{
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install_qdisc
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# Note that the backlog numbers here do not correspond to RED
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# configuration, but are arbitrary.
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do_mc_backlog_test 10 $BACKLOG1
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do_mc_backlog_test 11 $BACKLOG2
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uninstall_qdisc
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}
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red_mirror_test()
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{
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install_qdisc qevent early_drop block 10
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do_drop_mirror_test 10 $BACKLOG1 early_drop
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do_drop_mirror_test 11 $BACKLOG2 early_drop
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uninstall_qdisc
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}
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red_trap_test()
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{
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install_qdisc qevent early_drop block 10
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do_drop_trap_test 10 $BACKLOG1 early_drop
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do_drop_trap_test 11 $BACKLOG2 early_drop
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uninstall_qdisc
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}
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ecn_mirror_test()
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{
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install_qdisc ecn qevent mark block 10
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do_mark_mirror_test 10 $BACKLOG1
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do_mark_mirror_test 11 $BACKLOG2
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uninstall_qdisc
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}
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bail_on_lldpad
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trap cleanup EXIT
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setup_prepare
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setup_wait
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tests_run
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exit $EXIT_STATUS
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