| #!/bin/bash |
| # SPDX-License-Identifier: GPL-2.0 |
| # |
| # This test injects a 10-MB burst of traffic with VLAN tag and 802.1p priority |
| # of 1. This stream is consistently prioritized as priority 1, is put to PG |
| # buffer 1, and scheduled at TC 1. |
| # |
| # - the stream first ingresses through $swp1, where it is forwarded to $swp3 |
| # |
| # - then it ingresses through $swp4. Here it is put to a lossless buffer and put |
| # to a small pool ("PFC pool"). The traffic is forwarded to $swp2, which is |
| # shaped, and thus the PFC pool eventually fills, therefore the headroom |
| # fills, and $swp3 is paused. |
| # |
| # - since $swp3 now can't send traffic, the traffic ingressing $swp1 is kept at |
| # a pool ("overflow pool"). The overflow pool needs to be large enough to |
| # contain the whole burst. |
| # |
| # - eventually the PFC pool gets some traffic out, headroom therefore gets some |
| # traffic to the pool, and $swp3 is unpaused again. This way the traffic is |
| # gradually forwarded from the overflow pool, through the PFC pool, out of |
| # $swp2, and eventually to $h2. |
| # |
| # - if PFC works, all lossless flow packets that ingress through $swp1 should |
| # also be seen ingressing $h2. If it doesn't, there will be drops due to |
| # discrepancy between the speeds of $swp1 and $h2. |
| # |
| # - it should all play out relatively quickly, so that SLL and HLL will not |
| # cause drops. |
| # |
| # +-----------------------+ |
| # | H1 | |
| # | + $h1.111 | |
| # | | 192.0.2.33/28 | |
| # | | | |
| # | + $h1 | |
| # +---|-------------------+ +--------------------+ |
| # | | | |
| # +---|----------------------|--------------------|---------------------------+ |
| # | + $swp1 $swp3 + + $swp4 | |
| # | | iPOOL1 iPOOL0 | | iPOOL2 | |
| # | | ePOOL4 ePOOL5 | | ePOOL4 | |
| # | | 1Gbps | | 1Gbps | |
| # | | PFC:enabled=1 | | PFC:enabled=1 | |
| # | +-|----------------------|-+ +-|------------------------+ | |
| # | | + $swp1.111 $swp3.111 + | | + $swp4.111 | | |
| # | | | | | | |
| # | | BR1 | | BR2 | | |
| # | | | | | | |
| # | | | | + $swp2.111 | | |
| # | +--------------------------+ +---------|----------------+ | |
| # | | | |
| # | iPOOL0: 500KB dynamic | | |
| # | iPOOL1: 10MB static | | |
| # | iPOOL2: 1MB static + $swp2 | |
| # | ePOOL4: 500KB dynamic | iPOOL0 | |
| # | ePOOL5: 10MB static | ePOOL6 | |
| # | ePOOL6: "infinite" static | 200Mbps shaper | |
| # +-------------------------------------------------------|-------------------+ |
| # | |
| # +---|-------------------+ |
| # | + $h2 H2 | |
| # | | | |
| # | + $h2.111 | |
| # | 192.0.2.34/28 | |
| # +-----------------------+ |
| # |
| # iPOOL0+ePOOL4 is a helper pool for control traffic etc. |
| # iPOOL1+ePOOL5 are overflow pools. |
| # iPOOL2+ePOOL6 are PFC pools. |
| |
| ALL_TESTS=" |
| ping_ipv4 |
| test_qos_pfc |
| " |
| |
| lib_dir=$(dirname $0)/../../../net/forwarding |
| |
| NUM_NETIFS=6 |
| source $lib_dir/lib.sh |
| source $lib_dir/devlink_lib.sh |
| source qos_lib.sh |
| |
| _1KB=1000 |
| _100KB=$((100 * _1KB)) |
| _500KB=$((500 * _1KB)) |
| _1MB=$((1000 * _1KB)) |
| _10MB=$((10 * _1MB)) |
| |
| h1_create() |
| { |
| simple_if_init $h1 |
| mtu_set $h1 10000 |
| |
| vlan_create $h1 111 v$h1 192.0.2.33/28 |
| } |
| |
| h1_destroy() |
| { |
| vlan_destroy $h1 111 |
| |
| mtu_restore $h1 |
| simple_if_fini $h1 |
| } |
| |
| h2_create() |
| { |
| simple_if_init $h2 |
| mtu_set $h2 10000 |
| |
| vlan_create $h2 111 v$h2 192.0.2.34/28 |
| } |
| |
| h2_destroy() |
| { |
| vlan_destroy $h2 111 |
| |
| mtu_restore $h2 |
| simple_if_fini $h2 |
| } |
| |
| switch_create() |
| { |
| # pools |
| # ----- |
| |
| devlink_pool_size_thtype_save 0 |
| devlink_pool_size_thtype_save 4 |
| devlink_pool_size_thtype_save 1 |
| devlink_pool_size_thtype_save 5 |
| devlink_pool_size_thtype_save 2 |
| devlink_pool_size_thtype_save 6 |
| |
| devlink_port_pool_th_save $swp1 1 |
| devlink_port_pool_th_save $swp2 6 |
| devlink_port_pool_th_save $swp3 5 |
| devlink_port_pool_th_save $swp4 2 |
| |
| devlink_tc_bind_pool_th_save $swp1 1 ingress |
| devlink_tc_bind_pool_th_save $swp2 1 egress |
| devlink_tc_bind_pool_th_save $swp3 1 egress |
| devlink_tc_bind_pool_th_save $swp4 1 ingress |
| |
| # Control traffic pools. Just reduce the size. Keep them dynamic so that |
| # we don't need to change all the uninteresting quotas. |
| devlink_pool_size_thtype_set 0 dynamic $_500KB |
| devlink_pool_size_thtype_set 4 dynamic $_500KB |
| |
| # Overflow pools. |
| devlink_pool_size_thtype_set 1 static $_10MB |
| devlink_pool_size_thtype_set 5 static $_10MB |
| |
| # PFC pools. As per the writ, the size of egress PFC pool should be |
| # infinice, but actually it just needs to be large enough to not matter |
| # in practice, so reuse the 10MB limit. |
| devlink_pool_size_thtype_set 2 static $_1MB |
| devlink_pool_size_thtype_set 6 static $_10MB |
| |
| # $swp1 |
| # ----- |
| |
| ip link set dev $swp1 up |
| mtu_set $swp1 10000 |
| vlan_create $swp1 111 |
| ip link set dev $swp1.111 type vlan ingress-qos-map 0:0 1:1 |
| |
| devlink_port_pool_th_set $swp1 1 $_10MB |
| devlink_tc_bind_pool_th_set $swp1 1 ingress 1 $_10MB |
| |
| # Configure qdisc so that we can configure PG and therefore pool |
| # assignment. |
| tc qdisc replace dev $swp1 root handle 1: \ |
| ets bands 8 strict 8 priomap 7 6 |
| dcb buffer set dev $swp1 prio-buffer all:0 1:1 |
| |
| # $swp2 |
| # ----- |
| |
| ip link set dev $swp2 up |
| mtu_set $swp2 10000 |
| vlan_create $swp2 111 |
| ip link set dev $swp2.111 type vlan egress-qos-map 0:0 1:1 |
| |
| devlink_port_pool_th_set $swp2 6 $_10MB |
| devlink_tc_bind_pool_th_set $swp2 1 egress 6 $_10MB |
| |
| # prio 0->TC0 (band 7), 1->TC1 (band 6). TC1 is shaped. |
| tc qdisc replace dev $swp2 root handle 1: \ |
| ets bands 8 strict 8 priomap 7 6 |
| tc qdisc replace dev $swp2 parent 1:7 handle 17: \ |
| tbf rate 200Mbit burst 131072 limit 1M |
| |
| # $swp3 |
| # ----- |
| |
| ip link set dev $swp3 up |
| mtu_set $swp3 10000 |
| vlan_create $swp3 111 |
| ip link set dev $swp3.111 type vlan egress-qos-map 0:0 1:1 |
| |
| devlink_port_pool_th_set $swp3 5 $_10MB |
| devlink_tc_bind_pool_th_set $swp3 1 egress 5 $_10MB |
| |
| # prio 0->TC0 (band 7), 1->TC1 (band 6) |
| tc qdisc replace dev $swp3 root handle 1: \ |
| ets bands 8 strict 8 priomap 7 6 |
| |
| # Need to enable PFC so that PAUSE takes effect. Therefore need to put |
| # the lossless prio into a buffer of its own. Don't bother with buffer |
| # sizes though, there is not going to be any pressure in the "backward" |
| # direction. |
| dcb buffer set dev $swp3 prio-buffer all:0 1:1 |
| dcb pfc set dev $swp3 prio-pfc all:off 1:on |
| |
| # $swp4 |
| # ----- |
| |
| ip link set dev $swp4 up |
| mtu_set $swp4 10000 |
| vlan_create $swp4 111 |
| ip link set dev $swp4.111 type vlan ingress-qos-map 0:0 1:1 |
| |
| devlink_port_pool_th_set $swp4 2 $_1MB |
| devlink_tc_bind_pool_th_set $swp4 1 ingress 2 $_1MB |
| |
| # Configure qdisc so that we can hand-tune headroom. |
| tc qdisc replace dev $swp4 root handle 1: \ |
| ets bands 8 strict 8 priomap 7 6 |
| dcb buffer set dev $swp4 prio-buffer all:0 1:1 |
| dcb pfc set dev $swp4 prio-pfc all:off 1:on |
| # PG0 will get autoconfigured to Xoff, give PG1 arbitrarily 100K, which |
| # is (-2*MTU) about 80K of delay provision. |
| dcb buffer set dev $swp4 buffer-size all:0 1:$_100KB |
| |
| # bridges |
| # ------- |
| |
| ip link add name br1 type bridge vlan_filtering 0 |
| ip link set dev $swp1.111 master br1 |
| ip link set dev $swp3.111 master br1 |
| ip link set dev br1 up |
| |
| ip link add name br2 type bridge vlan_filtering 0 |
| ip link set dev $swp2.111 master br2 |
| ip link set dev $swp4.111 master br2 |
| ip link set dev br2 up |
| } |
| |
| switch_destroy() |
| { |
| # Do this first so that we can reset the limits to values that are only |
| # valid for the original static / dynamic setting. |
| devlink_pool_size_thtype_restore 6 |
| devlink_pool_size_thtype_restore 5 |
| devlink_pool_size_thtype_restore 4 |
| devlink_pool_size_thtype_restore 2 |
| devlink_pool_size_thtype_restore 1 |
| devlink_pool_size_thtype_restore 0 |
| |
| # bridges |
| # ------- |
| |
| ip link set dev br2 down |
| ip link set dev $swp4.111 nomaster |
| ip link set dev $swp2.111 nomaster |
| ip link del dev br2 |
| |
| ip link set dev br1 down |
| ip link set dev $swp3.111 nomaster |
| ip link set dev $swp1.111 nomaster |
| ip link del dev br1 |
| |
| # $swp4 |
| # ----- |
| |
| dcb buffer set dev $swp4 buffer-size all:0 |
| dcb pfc set dev $swp4 prio-pfc all:off |
| dcb buffer set dev $swp4 prio-buffer all:0 |
| tc qdisc del dev $swp4 root |
| |
| devlink_tc_bind_pool_th_restore $swp4 1 ingress |
| devlink_port_pool_th_restore $swp4 2 |
| |
| vlan_destroy $swp4 111 |
| mtu_restore $swp4 |
| ip link set dev $swp4 down |
| |
| # $swp3 |
| # ----- |
| |
| dcb pfc set dev $swp3 prio-pfc all:off |
| dcb buffer set dev $swp3 prio-buffer all:0 |
| tc qdisc del dev $swp3 root |
| |
| devlink_tc_bind_pool_th_restore $swp3 1 egress |
| devlink_port_pool_th_restore $swp3 5 |
| |
| vlan_destroy $swp3 111 |
| mtu_restore $swp3 |
| ip link set dev $swp3 down |
| |
| # $swp2 |
| # ----- |
| |
| tc qdisc del dev $swp2 parent 1:7 |
| tc qdisc del dev $swp2 root |
| |
| devlink_tc_bind_pool_th_restore $swp2 1 egress |
| devlink_port_pool_th_restore $swp2 6 |
| |
| vlan_destroy $swp2 111 |
| mtu_restore $swp2 |
| ip link set dev $swp2 down |
| |
| # $swp1 |
| # ----- |
| |
| dcb buffer set dev $swp1 prio-buffer all:0 |
| tc qdisc del dev $swp1 root |
| |
| devlink_tc_bind_pool_th_restore $swp1 1 ingress |
| devlink_port_pool_th_restore $swp1 1 |
| |
| vlan_destroy $swp1 111 |
| mtu_restore $swp1 |
| ip link set dev $swp1 down |
| } |
| |
| setup_prepare() |
| { |
| h1=${NETIFS[p1]} |
| swp1=${NETIFS[p2]} |
| |
| swp2=${NETIFS[p3]} |
| h2=${NETIFS[p4]} |
| |
| swp3=${NETIFS[p5]} |
| swp4=${NETIFS[p6]} |
| |
| h2mac=$(mac_get $h2) |
| |
| vrf_prepare |
| |
| h1_create |
| h2_create |
| switch_create |
| } |
| |
| cleanup() |
| { |
| pre_cleanup |
| |
| switch_destroy |
| h2_destroy |
| h1_destroy |
| |
| vrf_cleanup |
| } |
| |
| ping_ipv4() |
| { |
| ping_test $h1 192.0.2.34 |
| } |
| |
| test_qos_pfc() |
| { |
| RET=0 |
| |
| # 10M pool, each packet is 8K of payload + headers |
| local pkts=$((_10MB / 8050)) |
| local size=$((pkts * 8050)) |
| local in0=$(ethtool_stats_get $swp1 rx_octets_prio_1) |
| local out0=$(ethtool_stats_get $swp2 tx_octets_prio_1) |
| |
| $MZ $h1 -p 8000 -Q 1:111 -A 192.0.2.33 -B 192.0.2.34 \ |
| -a own -b $h2mac -c $pkts -t udp -q |
| sleep 2 |
| |
| local in1=$(ethtool_stats_get $swp1 rx_octets_prio_1) |
| local out1=$(ethtool_stats_get $swp2 tx_octets_prio_1) |
| |
| local din=$((in1 - in0)) |
| local dout=$((out1 - out0)) |
| |
| local pct_in=$((din * 100 / size)) |
| |
| ((pct_in > 95 && pct_in < 105)) |
| check_err $? "Relative ingress out of expected bounds, $pct_in% should be 100%" |
| |
| ((dout == din)) |
| check_err $? "$((din - dout)) bytes out of $din ingressed got lost" |
| |
| log_test "PFC" |
| } |
| |
| trap cleanup EXIT |
| |
| bail_on_lldpad |
| setup_prepare |
| setup_wait |
| tests_run |
| |
| exit $EXIT_STATUS |
