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403 lines
11 KiB
403 lines
11 KiB
#!/bin/bash |
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# SPDX-License-Identifier: GPL-2.0 |
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# |
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# This test injects a 10-MB burst of traffic with VLAN tag and 802.1p priority |
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# of 1. This stream is consistently prioritized as priority 1, is put to PG |
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# buffer 1, and scheduled at TC 1. |
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# |
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# - the stream first ingresses through $swp1, where it is forwarded to $swp3 |
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# |
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# - then it ingresses through $swp4. Here it is put to a lossless buffer and put |
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# to a small pool ("PFC pool"). The traffic is forwarded to $swp2, which is |
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# shaped, and thus the PFC pool eventually fills, therefore the headroom |
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# fills, and $swp3 is paused. |
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# |
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# - since $swp3 now can't send traffic, the traffic ingressing $swp1 is kept at |
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# a pool ("overflow pool"). The overflow pool needs to be large enough to |
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# contain the whole burst. |
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# |
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# - eventually the PFC pool gets some traffic out, headroom therefore gets some |
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# traffic to the pool, and $swp3 is unpaused again. This way the traffic is |
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# gradually forwarded from the overflow pool, through the PFC pool, out of |
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# $swp2, and eventually to $h2. |
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# |
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# - if PFC works, all lossless flow packets that ingress through $swp1 should |
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# also be seen ingressing $h2. If it doesn't, there will be drops due to |
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# discrepancy between the speeds of $swp1 and $h2. |
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# |
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# - it should all play out relatively quickly, so that SLL and HLL will not |
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# cause drops. |
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# |
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# +-----------------------+ |
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# | H1 | |
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# | + $h1.111 | |
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# | | 192.0.2.33/28 | |
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# | | | |
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# | + $h1 | |
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# +---|-------------------+ +--------------------+ |
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# | | | |
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# +---|----------------------|--------------------|---------------------------+ |
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# | + $swp1 $swp3 + + $swp4 | |
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# | | iPOOL1 iPOOL0 | | iPOOL2 | |
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# | | ePOOL4 ePOOL5 | | ePOOL4 | |
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# | | 1Gbps | | 1Gbps | |
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# | | PFC:enabled=1 | | PFC:enabled=1 | |
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# | +-|----------------------|-+ +-|------------------------+ | |
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# | | + $swp1.111 $swp3.111 + | | + $swp4.111 | | |
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# | | | | | | |
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# | | BR1 | | BR2 | | |
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# | | | | | | |
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# | | | | + $swp2.111 | | |
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# | +--------------------------+ +---------|----------------+ | |
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# | | | |
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# | iPOOL0: 500KB dynamic | | |
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# | iPOOL1: 10MB static | | |
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# | iPOOL2: 1MB static + $swp2 | |
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# | ePOOL4: 500KB dynamic | iPOOL0 | |
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# | ePOOL5: 10MB static | ePOOL6 | |
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# | ePOOL6: "infinite" static | 200Mbps shaper | |
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# +-------------------------------------------------------|-------------------+ |
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# | |
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# +---|-------------------+ |
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# | + $h2 H2 | |
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# | | | |
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# | + $h2.111 | |
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# | 192.0.2.34/28 | |
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# +-----------------------+ |
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# |
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# iPOOL0+ePOOL4 is a helper pool for control traffic etc. |
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# iPOOL1+ePOOL5 are overflow pools. |
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# iPOOL2+ePOOL6 are PFC pools. |
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ALL_TESTS=" |
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ping_ipv4 |
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test_qos_pfc |
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" |
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lib_dir=$(dirname $0)/../../../net/forwarding |
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NUM_NETIFS=6 |
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source $lib_dir/lib.sh |
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source $lib_dir/devlink_lib.sh |
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source qos_lib.sh |
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_1KB=1000 |
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_100KB=$((100 * _1KB)) |
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_500KB=$((500 * _1KB)) |
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_1MB=$((1000 * _1KB)) |
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_10MB=$((10 * _1MB)) |
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h1_create() |
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{ |
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simple_if_init $h1 |
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mtu_set $h1 10000 |
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vlan_create $h1 111 v$h1 192.0.2.33/28 |
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} |
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h1_destroy() |
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{ |
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vlan_destroy $h1 111 |
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mtu_restore $h1 |
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simple_if_fini $h1 |
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} |
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h2_create() |
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{ |
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simple_if_init $h2 |
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mtu_set $h2 10000 |
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vlan_create $h2 111 v$h2 192.0.2.34/28 |
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} |
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h2_destroy() |
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{ |
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vlan_destroy $h2 111 |
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mtu_restore $h2 |
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simple_if_fini $h2 |
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} |
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switch_create() |
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{ |
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# pools |
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# ----- |
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devlink_pool_size_thtype_save 0 |
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devlink_pool_size_thtype_save 4 |
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devlink_pool_size_thtype_save 1 |
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devlink_pool_size_thtype_save 5 |
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devlink_pool_size_thtype_save 2 |
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devlink_pool_size_thtype_save 6 |
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devlink_port_pool_th_save $swp1 1 |
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devlink_port_pool_th_save $swp2 6 |
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devlink_port_pool_th_save $swp3 5 |
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devlink_port_pool_th_save $swp4 2 |
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devlink_tc_bind_pool_th_save $swp1 1 ingress |
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devlink_tc_bind_pool_th_save $swp2 1 egress |
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devlink_tc_bind_pool_th_save $swp3 1 egress |
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devlink_tc_bind_pool_th_save $swp4 1 ingress |
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# Control traffic pools. Just reduce the size. Keep them dynamic so that |
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# we don't need to change all the uninteresting quotas. |
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devlink_pool_size_thtype_set 0 dynamic $_500KB |
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devlink_pool_size_thtype_set 4 dynamic $_500KB |
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# Overflow pools. |
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devlink_pool_size_thtype_set 1 static $_10MB |
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devlink_pool_size_thtype_set 5 static $_10MB |
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# PFC pools. As per the writ, the size of egress PFC pool should be |
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# infinice, but actually it just needs to be large enough to not matter |
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# in practice, so reuse the 10MB limit. |
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devlink_pool_size_thtype_set 2 static $_1MB |
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devlink_pool_size_thtype_set 6 static $_10MB |
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# $swp1 |
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# ----- |
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ip link set dev $swp1 up |
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mtu_set $swp1 10000 |
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vlan_create $swp1 111 |
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ip link set dev $swp1.111 type vlan ingress-qos-map 0:0 1:1 |
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devlink_port_pool_th_set $swp1 1 $_10MB |
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devlink_tc_bind_pool_th_set $swp1 1 ingress 1 $_10MB |
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# Configure qdisc so that we can configure PG and therefore pool |
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# assignment. |
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tc qdisc replace dev $swp1 root handle 1: \ |
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ets bands 8 strict 8 priomap 7 6 |
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__mlnx_qos -i $swp1 --prio2buffer=0,1,0,0,0,0,0,0 >/dev/null |
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# $swp2 |
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# ----- |
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ip link set dev $swp2 up |
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mtu_set $swp2 10000 |
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vlan_create $swp2 111 |
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ip link set dev $swp2.111 type vlan egress-qos-map 0:0 1:1 |
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devlink_port_pool_th_set $swp2 6 $_10MB |
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devlink_tc_bind_pool_th_set $swp2 1 egress 6 $_10MB |
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# prio 0->TC0 (band 7), 1->TC1 (band 6). TC1 is shaped. |
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tc qdisc replace dev $swp2 root handle 1: \ |
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ets bands 8 strict 8 priomap 7 6 |
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tc qdisc replace dev $swp2 parent 1:7 handle 17: \ |
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tbf rate 200Mbit burst 131072 limit 1M |
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# $swp3 |
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# ----- |
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ip link set dev $swp3 up |
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mtu_set $swp3 10000 |
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vlan_create $swp3 111 |
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ip link set dev $swp3.111 type vlan egress-qos-map 0:0 1:1 |
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devlink_port_pool_th_set $swp3 5 $_10MB |
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devlink_tc_bind_pool_th_set $swp3 1 egress 5 $_10MB |
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# prio 0->TC0 (band 7), 1->TC1 (band 6) |
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tc qdisc replace dev $swp3 root handle 1: \ |
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ets bands 8 strict 8 priomap 7 6 |
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# Need to enable PFC so that PAUSE takes effect. Therefore need to put |
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# the lossless prio into a buffer of its own. Don't bother with buffer |
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# sizes though, there is not going to be any pressure in the "backward" |
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# direction. |
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__mlnx_qos -i $swp3 --prio2buffer=0,1,0,0,0,0,0,0 >/dev/null |
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__mlnx_qos -i $swp3 --pfc=0,1,0,0,0,0,0,0 >/dev/null |
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# $swp4 |
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# ----- |
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ip link set dev $swp4 up |
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mtu_set $swp4 10000 |
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vlan_create $swp4 111 |
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ip link set dev $swp4.111 type vlan ingress-qos-map 0:0 1:1 |
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devlink_port_pool_th_set $swp4 2 $_1MB |
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devlink_tc_bind_pool_th_set $swp4 1 ingress 2 $_1MB |
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# Configure qdisc so that we can hand-tune headroom. |
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tc qdisc replace dev $swp4 root handle 1: \ |
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ets bands 8 strict 8 priomap 7 6 |
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__mlnx_qos -i $swp4 --prio2buffer=0,1,0,0,0,0,0,0 >/dev/null |
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__mlnx_qos -i $swp4 --pfc=0,1,0,0,0,0,0,0 >/dev/null |
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# PG0 will get autoconfigured to Xoff, give PG1 arbitrarily 100K, which |
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# is (-2*MTU) about 80K of delay provision. |
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__mlnx_qos -i $swp4 --buffer_size=0,$_100KB,0,0,0,0,0,0 >/dev/null |
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# bridges |
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# ------- |
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ip link add name br1 type bridge vlan_filtering 0 |
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ip link set dev $swp1.111 master br1 |
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ip link set dev $swp3.111 master br1 |
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ip link set dev br1 up |
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ip link add name br2 type bridge vlan_filtering 0 |
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ip link set dev $swp2.111 master br2 |
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ip link set dev $swp4.111 master br2 |
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ip link set dev br2 up |
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} |
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switch_destroy() |
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{ |
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# Do this first so that we can reset the limits to values that are only |
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# valid for the original static / dynamic setting. |
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devlink_pool_size_thtype_restore 6 |
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devlink_pool_size_thtype_restore 5 |
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devlink_pool_size_thtype_restore 4 |
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devlink_pool_size_thtype_restore 2 |
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devlink_pool_size_thtype_restore 1 |
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devlink_pool_size_thtype_restore 0 |
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# bridges |
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# ------- |
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ip link set dev br2 down |
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ip link set dev $swp4.111 nomaster |
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ip link set dev $swp2.111 nomaster |
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ip link del dev br2 |
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ip link set dev br1 down |
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ip link set dev $swp3.111 nomaster |
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ip link set dev $swp1.111 nomaster |
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ip link del dev br1 |
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# $swp4 |
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# ----- |
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__mlnx_qos -i $swp4 --buffer_size=0,0,0,0,0,0,0,0 >/dev/null |
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__mlnx_qos -i $swp4 --pfc=0,0,0,0,0,0,0,0 >/dev/null |
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__mlnx_qos -i $swp4 --prio2buffer=0,0,0,0,0,0,0,0 >/dev/null |
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tc qdisc del dev $swp4 root |
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devlink_tc_bind_pool_th_restore $swp4 1 ingress |
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devlink_port_pool_th_restore $swp4 2 |
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vlan_destroy $swp4 111 |
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mtu_restore $swp4 |
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ip link set dev $swp4 down |
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# $swp3 |
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# ----- |
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__mlnx_qos -i $swp3 --pfc=0,0,0,0,0,0,0,0 >/dev/null |
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__mlnx_qos -i $swp3 --prio2buffer=0,0,0,0,0,0,0,0 >/dev/null |
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tc qdisc del dev $swp3 root |
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devlink_tc_bind_pool_th_restore $swp3 1 egress |
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devlink_port_pool_th_restore $swp3 5 |
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vlan_destroy $swp3 111 |
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mtu_restore $swp3 |
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ip link set dev $swp3 down |
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# $swp2 |
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# ----- |
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tc qdisc del dev $swp2 parent 1:7 |
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tc qdisc del dev $swp2 root |
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devlink_tc_bind_pool_th_restore $swp2 1 egress |
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devlink_port_pool_th_restore $swp2 6 |
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vlan_destroy $swp2 111 |
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mtu_restore $swp2 |
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ip link set dev $swp2 down |
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# $swp1 |
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# ----- |
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__mlnx_qos -i $swp1 --prio2buffer=0,0,0,0,0,0,0,0 >/dev/null |
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tc qdisc del dev $swp1 root |
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devlink_tc_bind_pool_th_restore $swp1 1 ingress |
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devlink_port_pool_th_restore $swp1 1 |
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vlan_destroy $swp1 111 |
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mtu_restore $swp1 |
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ip link set dev $swp1 down |
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} |
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setup_prepare() |
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{ |
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h1=${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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swp4=${NETIFS[p6]} |
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h2mac=$(mac_get $h2) |
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vrf_prepare |
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h1_create |
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h2_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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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 $h1 192.0.2.34 |
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} |
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test_qos_pfc() |
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{ |
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RET=0 |
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# 10M pool, each packet is 8K of payload + headers |
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local pkts=$((_10MB / 8050)) |
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local size=$((pkts * 8050)) |
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local in0=$(ethtool_stats_get $swp1 rx_octets_prio_1) |
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local out0=$(ethtool_stats_get $swp2 tx_octets_prio_1) |
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$MZ $h1 -p 8000 -Q 1:111 -A 192.0.2.33 -B 192.0.2.34 \ |
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-a own -b $h2mac -c $pkts -t udp -q |
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sleep 2 |
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local in1=$(ethtool_stats_get $swp1 rx_octets_prio_1) |
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local out1=$(ethtool_stats_get $swp2 tx_octets_prio_1) |
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local din=$((in1 - in0)) |
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local dout=$((out1 - out0)) |
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local pct_in=$((din * 100 / size)) |
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((pct_in > 95 && pct_in < 105)) |
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check_err $? "Relative ingress out of expected bounds, $pct_in% should be 100%" |
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((dout == din)) |
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check_err $? "$((din - dout)) bytes out of $din ingressed got lost" |
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log_test "PFC" |
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} |
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trap cleanup EXIT |
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bail_on_lldpad |
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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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