404 lines
11 KiB
Bash
Executable File
404 lines
11 KiB
Bash
Executable File
#!/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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dcb buffer set dev $swp1 prio-buffer all:0 1:1
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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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dcb buffer set dev $swp3 prio-buffer all:0 1:1
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dcb pfc set dev $swp3 prio-pfc all:off 1:on
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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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dcb buffer set dev $swp4 prio-buffer all:0 1:1
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dcb pfc set dev $swp4 prio-pfc all:off 1:on
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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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dcb buffer set dev $swp4 buffer-size all:0 1:$_100KB
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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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dcb buffer set dev $swp4 buffer-size all:0
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dcb pfc set dev $swp4 prio-pfc all:off
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dcb buffer set dev $swp4 prio-buffer all:0
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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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dcb pfc set dev $swp3 prio-pfc all:off
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dcb buffer set dev $swp3 prio-buffer all:0
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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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dcb buffer set dev $swp1 prio-buffer all:0
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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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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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