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selftests: mlxsw: Add a RED selftest
This tests that below the queue minimum length, there is no dropping / marking, and above max, everything is dropped / marked. The test is structured as a core file with topology and test code, and three wrappers: one for RED used as a root Qdisc, and two for testing (W)RED under PRIO and ETS. Signed-off-by: Petr Machata <petrm@mellanox.com> Signed-off-by: Ido Schimmel <idosch@mellanox.com> Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Petr Machata
David S. Miller
parent
4113b04823
commit
3de611b507
5 changed files with 657 additions and 0 deletions
499
tools/testing/selftests/drivers/net/mlxsw/sch_red_core.sh
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499
tools/testing/selftests/drivers/net/mlxsw/sch_red_core.sh
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@ -0,0 +1,499 @@
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# SPDX-License-Identifier: GPL-2.0
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# This test sends a >1Gbps stream of traffic from H1, to the switch, which
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# forwards it to a 1Gbps port. This 1Gbps stream is then looped back to the
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# switch and forwarded to the port under test $swp3, which is also 1Gbps.
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#
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# This way, $swp3 should be 100% filled with traffic without any of it spilling
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# to the backlog. Any extra packets sent should almost 1:1 go to backlog. That
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# is what H2 is used for--it sends the extra traffic to create backlog.
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#
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# A RED Qdisc is installed on $swp3. The configuration is such that the minimum
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# and maximum size are 1 byte apart, so there is a very clear border under which
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# no marking or dropping takes place, and above which everything is marked or
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# dropped.
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#
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# The test uses the buffer build-up behavior to test the installed RED.
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#
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# In order to test WRED, $swp3 actually contains RED under PRIO, with two
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# different configurations. Traffic is prioritized using 802.1p and relies on
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# the implicit mlxsw configuration, where packet priority is taken 1:1 from the
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# 802.1p marking.
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#
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# +--------------------------+ +--------------------------+
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# | H1 | | H2 |
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# | + $h1.10 | | + $h2.10 |
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# | | 192.0.2.1/28 | | | 192.0.2.2/28 |
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# | | | | | |
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# | | $h1.11 + | | | $h2.11 + |
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# | | 192.0.2.17/28 | | | | 192.0.2.18/28 | |
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# | | | | | | | |
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# | \______ ______/ | | \______ ______/ |
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# | \ / | | \ / |
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# | + $h1 | | + $h2 |
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# +-------------|------------+ +-------------|------------+
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# | >1Gbps |
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# +-------------|------------------------------------------------|------------+
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# | SW + $swp1 + $swp2 |
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# | _______/ \___________ ___________/ \_______ |
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# | / \ / \ |
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# | +-|-----------------+ | +-|-----------------+ | |
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# | | + $swp1.10 | | | + $swp2.10 | | |
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# | | | | .-------------+ $swp5.10 | | |
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# | | BR1_10 | | | | | | |
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# | | | | | | BR2_10 | | |
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# | | + $swp2.10 | | | | | | |
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# | +-|-----------------+ | | | + $swp3.10 | | |
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# | | | | +-|-----------------+ | |
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# | | +-----------------|-+ | | +-----------------|-+ |
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# | | | $swp1.11 + | | | | $swp2.11 + | |
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# | | | | | .-----------------+ $swp5.11 | |
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# | | | BR1_11 | | | | | | |
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# | | | | | | | | BR2_11 | |
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# | | | $swp2.11 + | | | | | | |
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# | | +-----------------|-+ | | | | $swp3.11 + | |
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# | | | | | | +-----------------|-+ |
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# | \_______ ___________/ | | \___________ _______/ |
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# | \ / \ / \ / |
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# | + $swp4 + $swp5 + $swp3 |
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# +-------------|----------------------|-------------------------|------------+
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# | | | 1Gbps
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# \________1Gbps_________/ |
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# +----------------------------|------------+
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# | H3 + $h3 |
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# | _____________________/ \_______ |
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# | / \ |
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# | | | |
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# | + $h3.10 $h3.11 + |
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# | 192.0.2.3/28 192.0.2.19/28 |
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# +-----------------------------------------+
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NUM_NETIFS=8
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CHECK_TC="yes"
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lib_dir=$(dirname $0)/../../../net/forwarding
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source $lib_dir/lib.sh
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source $lib_dir/devlink_lib.sh
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source qos_lib.sh
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ipaddr()
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{
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local host=$1; shift
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local vlan=$1; shift
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echo 192.0.2.$((16 * (vlan - 10) + host))
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}
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host_create()
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{
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local dev=$1; shift
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local host=$1; shift
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simple_if_init $dev
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mtu_set $dev 10000
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vlan_create $dev 10 v$dev $(ipaddr $host 10)/28
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ip link set dev $dev.10 type vlan egress 0:0
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vlan_create $dev 11 v$dev $(ipaddr $host 11)/28
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ip link set dev $dev.11 type vlan egress 0:1
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}
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host_destroy()
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{
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local dev=$1; shift
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vlan_destroy $dev 11
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vlan_destroy $dev 10
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mtu_restore $dev
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simple_if_fini $dev
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}
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h1_create()
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{
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host_create $h1 1
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}
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h1_destroy()
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{
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host_destroy $h1
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}
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h2_create()
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{
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host_create $h2 2
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# Some of the tests in this suite use multicast traffic. As this traffic
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# enters BR2_10 resp. BR2_11, it is flooded to all other ports. Thus
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# e.g. traffic ingressing through $swp2 is flooded to $swp3 (the
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# intended destination) and $swp5 (which is intended as ingress for
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# another stream of traffic).
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#
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# This is generally not a problem, but if the $swp5 throughput is lower
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# than $swp2 throughput, there will be a build-up at $swp5. That may
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# cause packets to fail to queue up at $swp3 due to shared buffer
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# quotas, and the test to spuriously fail.
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#
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# Prevent this by setting the speed of $h2 to 1Gbps.
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ethtool -s $h2 speed 1000 autoneg off
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}
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h2_destroy()
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{
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ethtool -s $h2 autoneg on
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host_destroy $h2
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}
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h3_create()
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{
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host_create $h3 3
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ethtool -s $h3 speed 1000 autoneg off
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}
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h3_destroy()
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{
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ethtool -s $h3 autoneg on
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host_destroy $h3
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}
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switch_create()
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{
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local intf
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local vlan
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ip link add dev br1_10 type bridge
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ip link add dev br1_11 type bridge
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ip link add dev br2_10 type bridge
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ip link add dev br2_11 type bridge
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for intf in $swp1 $swp2 $swp3 $swp4 $swp5; do
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ip link set dev $intf up
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mtu_set $intf 10000
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done
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for intf in $swp1 $swp4; do
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for vlan in 10 11; do
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vlan_create $intf $vlan
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ip link set dev $intf.$vlan master br1_$vlan
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ip link set dev $intf.$vlan up
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done
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done
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for intf in $swp2 $swp3 $swp5; do
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for vlan in 10 11; do
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vlan_create $intf $vlan
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ip link set dev $intf.$vlan master br2_$vlan
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ip link set dev $intf.$vlan up
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done
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done
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ip link set dev $swp4.10 type vlan egress 0:0
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ip link set dev $swp4.11 type vlan egress 0:1
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for intf in $swp1 $swp2 $swp5; do
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for vlan in 10 11; do
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ip link set dev $intf.$vlan type vlan ingress 0:0 1:1
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done
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done
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for intf in $swp2 $swp3 $swp4 $swp5; do
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ethtool -s $intf speed 1000 autoneg off
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done
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ip link set dev br1_10 up
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ip link set dev br1_11 up
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ip link set dev br2_10 up
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ip link set dev br2_11 up
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local size=$(devlink_pool_size_thtype 0 | cut -d' ' -f 1)
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devlink_port_pool_th_set $swp3 8 $size
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}
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switch_destroy()
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{
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local intf
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local vlan
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devlink_port_pool_th_restore $swp3 8
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tc qdisc del dev $swp3 root 2>/dev/null
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ip link set dev br2_11 down
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ip link set dev br2_10 down
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ip link set dev br1_11 down
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ip link set dev br1_10 down
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for intf in $swp5 $swp4 $swp3 $swp2; do
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ethtool -s $intf autoneg on
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done
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for intf in $swp5 $swp3 $swp2 $swp4 $swp1; do
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for vlan in 11 10; do
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ip link set dev $intf.$vlan down
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ip link set dev $intf.$vlan nomaster
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vlan_destroy $intf $vlan
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done
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mtu_restore $intf
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ip link set dev $intf down
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done
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ip link del dev br2_11
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ip link del dev br2_10
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ip link del dev br1_11
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ip link del dev br1_10
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}
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setup_prepare()
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{
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h1=${NETIFS[p1]}
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swp1=${NETIFS[p2]}
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swp2=${NETIFS[p3]}
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h2=${NETIFS[p4]}
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swp3=${NETIFS[p5]}
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h3=${NETIFS[p6]}
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swp4=${NETIFS[p7]}
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swp5=${NETIFS[p8]}
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h3_mac=$(mac_get $h3)
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vrf_prepare
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h1_create
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h2_create
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h3_create
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switch_create
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}
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cleanup()
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{
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pre_cleanup
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switch_destroy
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h3_destroy
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h2_destroy
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h1_destroy
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vrf_cleanup
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}
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ping_ipv4()
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{
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ping_test $h1.10 $(ipaddr 3 10) " from host 1, vlan 10"
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ping_test $h1.11 $(ipaddr 3 11) " from host 1, vlan 11"
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ping_test $h2.10 $(ipaddr 3 10) " from host 2, vlan 10"
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ping_test $h2.11 $(ipaddr 3 11) " from host 2, vlan 11"
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}
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get_tc()
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{
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local vlan=$1; shift
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echo $((vlan - 10))
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}
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get_qdisc_handle()
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{
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local vlan=$1; shift
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local tc=$(get_tc $vlan)
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local band=$((8 - tc))
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# Handle is 107: for TC1, 108: for TC0.
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echo "10$band:"
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}
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get_qdisc_backlog()
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{
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local vlan=$1; shift
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qdisc_stats_get $swp3 $(get_qdisc_handle $vlan) .backlog
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}
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get_mc_transmit_queue()
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{
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local vlan=$1; shift
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local tc=$(($(get_tc $vlan) + 8))
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ethtool_stats_get $swp3 tc_transmit_queue_tc_$tc
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}
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get_nmarked()
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{
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local vlan=$1; shift
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ethtool_stats_get $swp3 ecn_marked
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}
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get_qdisc_npackets()
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{
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local vlan=$1; shift
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busywait_for_counter 1100 +1 \
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qdisc_stats_get $swp3 $(get_qdisc_handle $vlan) .packets
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}
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# This sends traffic in an attempt to build a backlog of $size. Returns 0 on
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# success. After 10 failed attempts it bails out and returns 1. It dumps the
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# backlog size to stdout.
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build_backlog()
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{
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local vlan=$1; shift
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local size=$1; shift
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local proto=$1; shift
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local tc=$((vlan - 10))
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local band=$((8 - tc))
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local cur=-1
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local i=0
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while :; do
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local cur=$(busywait 1100 until_counter_is $((cur + 1)) \
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get_qdisc_backlog $vlan)
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local diff=$((size - cur))
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local pkts=$(((diff + 7999) / 8000))
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if ((cur >= size)); then
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echo $cur
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return 0
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elif ((i++ > 10)); then
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echo $cur
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return 1
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fi
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$MZ $h2.$vlan -p 8000 -a own -b $h3_mac \
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-A $(ipaddr 2 $vlan) -B $(ipaddr 3 $vlan) \
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-t $proto -q -c $pkts "$@"
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done
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}
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check_marking()
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{
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local vlan=$1; shift
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local cond=$1; shift
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local npackets_0=$(get_qdisc_npackets $vlan)
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local nmarked_0=$(get_nmarked $vlan)
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sleep 5
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local npackets_1=$(get_qdisc_npackets $vlan)
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local nmarked_1=$(get_nmarked $vlan)
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local nmarked_d=$((nmarked_1 - nmarked_0))
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local npackets_d=$((npackets_1 - npackets_0))
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local pct=$((100 * nmarked_d / npackets_d))
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echo $pct
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((pct $cond))
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}
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do_ecn_test()
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{
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local vlan=$1; shift
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local limit=$1; shift
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local backlog
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local pct
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# Main stream.
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start_tcp_traffic $h1.$vlan $(ipaddr 1 $vlan) $(ipaddr 3 $vlan) \
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$h3_mac tos=0x01
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# Build the below-the-limit backlog using UDP. We could use TCP just
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# fine, but this way we get a proof that UDP is accepted when queue
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# length is below the limit. The main stream is using TCP, and if the
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# limit is misconfigured, we would see this traffic being ECN marked.
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RET=0
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backlog=$(build_backlog $vlan $((2 * limit / 3)) udp)
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check_err $? "Could not build the requested backlog"
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pct=$(check_marking $vlan "== 0")
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check_err $? "backlog $backlog / $limit Got $pct% marked packets, expected == 0."
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log_test "TC $((vlan - 10)): ECN backlog < limit"
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# Now push TCP, because non-TCP traffic would be early-dropped after the
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# backlog crosses the limit, and we want to make sure that the backlog
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# is above the limit.
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RET=0
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backlog=$(build_backlog $vlan $((3 * limit / 2)) tcp tos=0x01)
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check_err $? "Could not build the requested backlog"
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pct=$(check_marking $vlan ">= 95")
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check_err $? "backlog $backlog / $limit Got $pct% marked packets, expected >= 95."
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log_test "TC $((vlan - 10)): ECN backlog > limit"
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# Up there we saw that UDP gets accepted when backlog is below the
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# limit. Now that it is above, it should all get dropped, and backlog
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# building should fail.
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RET=0
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build_backlog $vlan $((2 * limit)) udp >/dev/null
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check_fail $? "UDP traffic went into backlog instead of being early-dropped"
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log_test "TC $((vlan - 10)): ECN backlog > limit: UDP early-dropped"
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||||
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||||
stop_traffic
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sleep 1
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}
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||||
|
||||
do_red_test()
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{
|
||||
local vlan=$1; shift
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local limit=$1; shift
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local backlog
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local pct
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# Use ECN-capable TCP to verify there's no marking even though the queue
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||||
# is above limit.
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start_tcp_traffic $h1.$vlan $(ipaddr 1 $vlan) $(ipaddr 3 $vlan) \
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||||
$h3_mac tos=0x01
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||||
|
||||
# Pushing below the queue limit should work.
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RET=0
|
||||
backlog=$(build_backlog $vlan $((2 * limit / 3)) tcp tos=0x01)
|
||||
check_err $? "Could not build the requested backlog"
|
||||
pct=$(check_marking $vlan "== 0")
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check_err $? "backlog $backlog / $limit Got $pct% marked packets, expected == 0."
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||||
log_test "TC $((vlan - 10)): RED backlog < limit"
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||||
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||||
# Pushing above should not.
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||||
RET=0
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||||
backlog=$(build_backlog $vlan $((3 * limit / 2)) tcp tos=0x01)
|
||||
check_fail $? "Traffic went into backlog instead of being early-dropped"
|
||||
pct=$(check_marking $vlan "== 0")
|
||||
check_err $? "backlog $backlog / $limit Got $pct% marked packets, expected == 0."
|
||||
local diff=$((limit - backlog))
|
||||
pct=$((100 * diff / limit))
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((0 <= pct && pct <= 5))
|
||||
check_err $? "backlog $backlog / $limit expected <= 5% distance"
|
||||
log_test "TC $((vlan - 10)): RED backlog > limit"
|
||||
|
||||
stop_traffic
|
||||
sleep 1
|
||||
}
|
||||
|
||||
do_mc_backlog_test()
|
||||
{
|
||||
local vlan=$1; shift
|
||||
local limit=$1; shift
|
||||
local backlog
|
||||
local pct
|
||||
|
||||
RET=0
|
||||
|
||||
start_tcp_traffic $h1.$vlan $(ipaddr 1 $vlan) $(ipaddr 3 $vlan) bc
|
||||
start_tcp_traffic $h2.$vlan $(ipaddr 2 $vlan) $(ipaddr 3 $vlan) bc
|
||||
|
||||
qbl=$(busywait 5000 until_counter_is 500000 \
|
||||
get_qdisc_backlog $vlan)
|
||||
check_err $? "Could not build MC backlog"
|
||||
|
||||
# Verify that we actually see the backlog on BUM TC. Do a busywait as
|
||||
# well, performance blips might cause false fail.
|
||||
local ebl
|
||||
ebl=$(busywait 5000 until_counter_is 500000 \
|
||||
get_mc_transmit_queue $vlan)
|
||||
check_err $? "MC backlog reported by qdisc not visible in ethtool"
|
||||
|
||||
stop_traffic
|
||||
stop_traffic
|
||||
|
||||
log_test "TC $((vlan - 10)): Qdisc reports MC backlog"
|
||||
}
|
||||
83
tools/testing/selftests/drivers/net/mlxsw/sch_red_ets.sh
Executable file
83
tools/testing/selftests/drivers/net/mlxsw/sch_red_ets.sh
Executable file
|
|
@ -0,0 +1,83 @@
|
|||
#!/bin/bash
|
||||
# SPDX-License-Identifier: GPL-2.0
|
||||
|
||||
ALL_TESTS="
|
||||
ping_ipv4
|
||||
ecn_test
|
||||
red_test
|
||||
mc_backlog_test
|
||||
"
|
||||
: ${QDISC:=ets}
|
||||
source sch_red_core.sh
|
||||
|
||||
# do_ecn_test first build 2/3 of the requested backlog and expects no marking,
|
||||
# and then builds 3/2 of it and does expect marking. The values of $BACKLOG1 and
|
||||
# $BACKLOG2 are far enough not to overlap, so that we can assume that if we do
|
||||
# see (do not see) marking, it is actually due to the configuration of that one
|
||||
# TC, and not due to configuration of the other TC leaking over.
|
||||
BACKLOG1=200000
|
||||
BACKLOG2=500000
|
||||
|
||||
install_qdisc()
|
||||
{
|
||||
local -a args=("$@")
|
||||
|
||||
tc qdisc add dev $swp3 root handle 10: $QDISC \
|
||||
bands 8 priomap 7 6 5 4 3 2 1 0
|
||||
tc qdisc add dev $swp3 parent 10:8 handle 108: red \
|
||||
limit 1000000 min $BACKLOG1 max $((BACKLOG1 + 1)) \
|
||||
probability 1.0 avpkt 8000 burst 38 "${args[@]}"
|
||||
tc qdisc add dev $swp3 parent 10:7 handle 107: red \
|
||||
limit 1000000 min $BACKLOG2 max $((BACKLOG2 + 1)) \
|
||||
probability 1.0 avpkt 8000 burst 63 "${args[@]}"
|
||||
sleep 1
|
||||
}
|
||||
|
||||
uninstall_qdisc()
|
||||
{
|
||||
tc qdisc del dev $swp3 parent 10:7
|
||||
tc qdisc del dev $swp3 parent 10:8
|
||||
tc qdisc del dev $swp3 root
|
||||
}
|
||||
|
||||
ecn_test()
|
||||
{
|
||||
install_qdisc ecn
|
||||
|
||||
do_ecn_test 10 $BACKLOG1
|
||||
do_ecn_test 11 $BACKLOG2
|
||||
|
||||
uninstall_qdisc
|
||||
}
|
||||
|
||||
red_test()
|
||||
{
|
||||
install_qdisc
|
||||
|
||||
do_red_test 10 $BACKLOG1
|
||||
do_red_test 11 $BACKLOG2
|
||||
|
||||
uninstall_qdisc
|
||||
}
|
||||
|
||||
mc_backlog_test()
|
||||
{
|
||||
install_qdisc
|
||||
|
||||
# Note that the backlog numbers here do not correspond to RED
|
||||
# configuration, but are arbitrary.
|
||||
do_mc_backlog_test 10 $BACKLOG1
|
||||
do_mc_backlog_test 11 $BACKLOG2
|
||||
|
||||
uninstall_qdisc
|
||||
}
|
||||
|
||||
trap cleanup EXIT
|
||||
|
||||
setup_prepare
|
||||
setup_wait
|
||||
|
||||
bail_on_lldpad
|
||||
tests_run
|
||||
|
||||
exit $EXIT_STATUS
|
||||
5
tools/testing/selftests/drivers/net/mlxsw/sch_red_prio.sh
Executable file
5
tools/testing/selftests/drivers/net/mlxsw/sch_red_prio.sh
Executable file
|
|
@ -0,0 +1,5 @@
|
|||
#!/bin/bash
|
||||
# SPDX-License-Identifier: GPL-2.0
|
||||
|
||||
QDISC=prio
|
||||
source sch_red_ets.sh
|
||||
60
tools/testing/selftests/drivers/net/mlxsw/sch_red_root.sh
Executable file
60
tools/testing/selftests/drivers/net/mlxsw/sch_red_root.sh
Executable file
|
|
@ -0,0 +1,60 @@
|
|||
#!/bin/bash
|
||||
# SPDX-License-Identifier: GPL-2.0
|
||||
|
||||
ALL_TESTS="
|
||||
ping_ipv4
|
||||
ecn_test
|
||||
red_test
|
||||
mc_backlog_test
|
||||
"
|
||||
source sch_red_core.sh
|
||||
|
||||
BACKLOG=300000
|
||||
|
||||
install_qdisc()
|
||||
{
|
||||
local -a args=("$@")
|
||||
|
||||
tc qdisc add dev $swp3 root handle 108: red \
|
||||
limit 1000000 min $BACKLOG max $((BACKLOG + 1)) \
|
||||
probability 1.0 avpkt 8000 burst 38 "${args[@]}"
|
||||
sleep 1
|
||||
}
|
||||
|
||||
uninstall_qdisc()
|
||||
{
|
||||
tc qdisc del dev $swp3 root
|
||||
}
|
||||
|
||||
ecn_test()
|
||||
{
|
||||
install_qdisc ecn
|
||||
do_ecn_test 10 $BACKLOG
|
||||
uninstall_qdisc
|
||||
}
|
||||
|
||||
red_test()
|
||||
{
|
||||
install_qdisc
|
||||
do_red_test 10 $BACKLOG
|
||||
uninstall_qdisc
|
||||
}
|
||||
|
||||
mc_backlog_test()
|
||||
{
|
||||
install_qdisc
|
||||
# Note that the backlog value here does not correspond to RED
|
||||
# configuration, but is arbitrary.
|
||||
do_mc_backlog_test 10 $BACKLOG
|
||||
uninstall_qdisc
|
||||
}
|
||||
|
||||
trap cleanup EXIT
|
||||
|
||||
setup_prepare
|
||||
setup_wait
|
||||
|
||||
bail_on_lldpad
|
||||
tests_run
|
||||
|
||||
exit $EXIT_STATUS
|
||||
|
|
@ -607,6 +607,16 @@ ethtool_stats_get()
|
|||
ethtool -S $dev | grep "^ *$stat:" | head -n 1 | cut -d: -f2
|
||||
}
|
||||
|
||||
qdisc_stats_get()
|
||||
{
|
||||
local dev=$1; shift
|
||||
local handle=$1; shift
|
||||
local selector=$1; shift
|
||||
|
||||
tc -j -s qdisc show dev "$dev" \
|
||||
| jq '.[] | select(.handle == "'"$handle"'") | '"$selector"
|
||||
}
|
||||
|
||||
humanize()
|
||||
{
|
||||
local speed=$1; shift
|
||||
|
|
|
|||
Loading…
Reference in a new issue