tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1#!/bin/bash
2# SPDX-License-Identifier: GPL-2.0
3#
4# A test for strict prioritization of traffic in the switch. Run two streams of
5# traffic, each through a different ingress port, one tagged with PCP of 1, the
6# other with PCP of 2. Both streams converge at one egress port, where they are
7# assigned TC of, respectively, 1 and 2, with strict priority configured between
8# them. In H3, we expect to see (almost) exclusively the high-priority traffic.
9#
10# Please see qos_mc_aware.sh for an explanation of why we use mausezahn and
11# counters instead of just running iperf3.
12#
13# +---------------------------+ +-----------------------------+
14# | H1 | | H2 |
15# | $h1.111 + | | + $h2.222 |
16# | 192.0.2.33/28 | | | | 192.0.2.65/28 |
17# | e-qos-map 0:1 | | | | e-qos-map 0:2 |
18# | | | | | |
19# | $h1 + | | + $h2 |
20# +-----------------|---------+ +---------|-------------------+
21# | |
22# +-----------------|-------------------------------------|-------------------+
23# | $swp1 + + $swp2 |
24# | >1Gbps | | >1Gbps |
25# | +---------------|-----------+ +----------|----------------+ |
26# | | $swp1.111 + | | + $swp2.222 | |
27# | | BR111 | SW | BR222 | |
28# | | $swp3.111 + | | + $swp3.222 | |
29# | +---------------|-----------+ +----------|----------------+ |
30# | \_____________________________________/ |
31# | | |
32# | + $swp3 |
33# | | 1Gbps bottleneck |
34# | | ETS: (up n->tc n for n in 0..7) |
35# | | strict priority |
36# +------------------------------------|--------------------------------------+
37# |
38# +--------------------|--------------------+
39# | + $h3 H3 |
40# | / \ |
41# | / \ |
42# | $h3.111 + + $h3.222 |
43# | 192.0.2.34/28 192.0.2.66/28 |
44# +-----------------------------------------+
45
46ALL_TESTS="
47 ping_ipv4
48 test_ets_strict
49"
50
51lib_dir=$(dirname $0)/../../../net/forwarding
52
53NUM_NETIFS=6
54source $lib_dir/lib.sh
55source $lib_dir/devlink_lib.sh
56source qos_lib.sh
57
58h1_create()
59{
60 simple_if_init $h1
61 mtu_set $h1 10000
62
63 vlan_create $h1 111 v$h1 192.0.2.33/28
64 ip link set dev $h1.111 type vlan egress-qos-map 0:1
65}
66
67h1_destroy()
68{
69 vlan_destroy $h1 111
70
71 mtu_restore $h1
72 simple_if_fini $h1
73}
74
75h2_create()
76{
77 simple_if_init $h2
78 mtu_set $h2 10000
79
80 vlan_create $h2 222 v$h2 192.0.2.65/28
81 ip link set dev $h2.222 type vlan egress-qos-map 0:2
82}
83
84h2_destroy()
85{
86 vlan_destroy $h2 222
87
88 mtu_restore $h2
89 simple_if_fini $h2
90}
91
92h3_create()
93{
94 simple_if_init $h3
95 mtu_set $h3 10000
96
97 vlan_create $h3 111 v$h3 192.0.2.34/28
98 vlan_create $h3 222 v$h3 192.0.2.66/28
99}
100
101h3_destroy()
102{
103 vlan_destroy $h3 222
104 vlan_destroy $h3 111
105
106 mtu_restore $h3
107 simple_if_fini $h3
108}
109
110switch_create()
111{
112 ip link set dev $swp1 up
113 mtu_set $swp1 10000
114
115 ip link set dev $swp2 up
116 mtu_set $swp2 10000
117
118 # prio n -> TC n, strict scheduling
119 lldptool -T -i $swp3 -V ETS-CFG up2tc=0:0,1:1,2:2,3:3,4:4,5:5,6:6,7:7
120 lldptool -T -i $swp3 -V ETS-CFG tsa=$(
121 )"0:strict,"$(
122 )"1:strict,"$(
123 )"2:strict,"$(
124 )"3:strict,"$(
125 )"4:strict,"$(
126 )"5:strict,"$(
127 )"6:strict,"$(
128 )"7:strict"
129 sleep 1
130
131 ip link set dev $swp3 up
132 mtu_set $swp3 10000
133 ethtool -s $swp3 speed 1000 autoneg off
134
135 vlan_create $swp1 111
136 vlan_create $swp2 222
137 vlan_create $swp3 111
138 vlan_create $swp3 222
139
140 ip link add name br111 up type bridge vlan_filtering 0
141 ip link set dev $swp1.111 master br111
142 ip link set dev $swp3.111 master br111
143
144 ip link add name br222 up type bridge vlan_filtering 0
145 ip link set dev $swp2.222 master br222
146 ip link set dev $swp3.222 master br222
147
148 # Make sure that ingress quotas are smaller than egress so that there is
149 # room for both streams of traffic to be admitted to shared buffer.
150 devlink_pool_size_thtype_save 0
151 devlink_pool_size_thtype_set 0 dynamic 10000000
152 devlink_pool_size_thtype_save 4
153 devlink_pool_size_thtype_set 4 dynamic 10000000
154
155 devlink_port_pool_th_save $swp1 0
156 devlink_port_pool_th_set $swp1 0 6
157 devlink_tc_bind_pool_th_save $swp1 1 ingress
158 devlink_tc_bind_pool_th_set $swp1 1 ingress 0 6
159
160 devlink_port_pool_th_save $swp2 0
161 devlink_port_pool_th_set $swp2 0 6
162 devlink_tc_bind_pool_th_save $swp2 2 ingress
163 devlink_tc_bind_pool_th_set $swp2 2 ingress 0 6
164
165 devlink_tc_bind_pool_th_save $swp3 1 egress
166 devlink_tc_bind_pool_th_set $swp3 1 egress 4 7
167 devlink_tc_bind_pool_th_save $swp3 2 egress
168 devlink_tc_bind_pool_th_set $swp3 2 egress 4 7
169 devlink_port_pool_th_save $swp3 4
170 devlink_port_pool_th_set $swp3 4 7
171}
172
173switch_destroy()
174{
175 devlink_port_pool_th_restore $swp3 4
176 devlink_tc_bind_pool_th_restore $swp3 2 egress
177 devlink_tc_bind_pool_th_restore $swp3 1 egress
178
179 devlink_tc_bind_pool_th_restore $swp2 2 ingress
180 devlink_port_pool_th_restore $swp2 0
181
182 devlink_tc_bind_pool_th_restore $swp1 1 ingress
183 devlink_port_pool_th_restore $swp1 0
184
185 devlink_pool_size_thtype_restore 4
186 devlink_pool_size_thtype_restore 0
187
188 ip link del dev br222
189 ip link del dev br111
190
191 vlan_destroy $swp3 222
192 vlan_destroy $swp3 111
193 vlan_destroy $swp2 222
194 vlan_destroy $swp1 111
195
196 ethtool -s $swp3 autoneg on
197 mtu_restore $swp3
198 ip link set dev $swp3 down
199 lldptool -T -i $swp3 -V ETS-CFG up2tc=0:0,1:0,2:0,3:0,4:0,5:0,6:0,7:0
200
201 mtu_restore $swp2
202 ip link set dev $swp2 down
203
204 mtu_restore $swp1
205 ip link set dev $swp1 down
206}
207
208setup_prepare()
209{
210 h1=${NETIFS[p1]}
211 swp1=${NETIFS[p2]}
212
213 swp2=${NETIFS[p3]}
214 h2=${NETIFS[p4]}
215
216 swp3=${NETIFS[p5]}
217 h3=${NETIFS[p6]}
218
219 h3mac=$(mac_get $h3)
220
221 vrf_prepare
222
223 h1_create
224 h2_create
225 h3_create
226 switch_create
227}
228
229cleanup()
230{
231 pre_cleanup
232
233 switch_destroy
234 h3_destroy
235 h2_destroy
236 h1_destroy
237
238 vrf_cleanup
239}
240
241ping_ipv4()
242{
243 ping_test $h1 192.0.2.34 " from H1"
244 ping_test $h2 192.0.2.66 " from H2"
245}
246
247rel()
248{
249 local old=$1; shift
250 local new=$1; shift
251
252 bc <<< "
253 scale=2
254 ret = 100 * $new / $old
255 if (ret > 0) { ret } else { 0 }
256 "
257}
258
259test_ets_strict()
260{
261 RET=0
262
263 # Run high-prio traffic on its own.
264 start_traffic $h2.222 192.0.2.65 192.0.2.66 $h3mac
265 local -a rate_2
266 rate_2=($(measure_rate $swp2 $h3 rx_octets_prio_2 "prio 2"))
267 check_err $? "Could not get high enough prio-2 ingress rate"
268 local rate_2_in=${rate_2[0]}
269 local rate_2_eg=${rate_2[1]}
270 stop_traffic # $h2.222
271
272 # Start low-prio stream.
273 start_traffic $h1.111 192.0.2.33 192.0.2.34 $h3mac
274
275 local -a rate_1
276 rate_1=($(measure_rate $swp1 $h3 rx_octets_prio_1 "prio 1"))
277 check_err $? "Could not get high enough prio-1 ingress rate"
278 local rate_1_in=${rate_1[0]}
279 local rate_1_eg=${rate_1[1]}
280
281 # High-prio and low-prio on their own should have about the same
282 # throughput.
283 local rel21=$(rel $rate_1_eg $rate_2_eg)
284 check_err $(bc <<< "$rel21 < 95")
285 check_err $(bc <<< "$rel21 > 105")
286
287 # Start the high-prio stream--now both streams run.
288 start_traffic $h2.222 192.0.2.65 192.0.2.66 $h3mac
289 rate_3=($(measure_rate $swp2 $h3 rx_octets_prio_2 "prio 2 w/ 1"))
290 check_err $? "Could not get high enough prio-2 ingress rate with prio-1"
291 local rate_3_in=${rate_3[0]}
292 local rate_3_eg=${rate_3[1]}
293 stop_traffic # $h2.222
294
295 stop_traffic # $h1.111
296
297 # High-prio should have about the same throughput whether or not
298 # low-prio is in the system.
299 local rel32=$(rel $rate_2_eg $rate_3_eg)
300 check_err $(bc <<< "$rel32 < 95")
301
302 log_test "strict priority"
303 echo "Ingress to switch:"
304 echo " p1 in rate $(humanize $rate_1_in)"
305 echo " p2 in rate $(humanize $rate_2_in)"
306 echo " p2 in rate w/ p1 $(humanize $rate_3_in)"
307 echo "Egress from switch:"
308 echo " p1 eg rate $(humanize $rate_1_eg)"
309 echo " p2 eg rate $(humanize $rate_2_eg) ($rel21% of p1)"
310 echo " p2 eg rate w/ p1 $(humanize $rate_3_eg) ($rel32% of p2)"
311}
312
313trap cleanup EXIT
314
315setup_prepare
316setup_wait
317
318tests_run
319
320exit $EXIT_STATUS