xref: /linux/tools/testing/selftests/drivers/net/mlxsw/qos_ets_strict.sh (revision a1c3be890440a1769ed6f822376a3e3ab0d42994) 
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
321