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selftests: mlxsw: Add a new test for strict priority

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Test that when strict priority is configured on a system, the
higher-priority traffic does actually win all the available bandwidth.
The test uses a similar approach to qos_mc_aware.sh to run and account
the traffic.

Signed-off-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Petr Machata 2019-03-28 12:12:27 +00:00 committed by David S. Miller
parent 573363a68f
commit 30905dc63b
1 changed files with 311 additions and 0 deletions
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311
tools/testing/selftests/drivers/net/mlxsw/qos_ets_strict.sh Executable file
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#!/bin/bash
# SPDX-License-Identifier: GPL-2.0
#
# A test for strict prioritization of traffic in the switch. Run two streams of
# traffic, each through a different ingress port, one tagged with PCP of 1, the
# other with PCP of 2. Both streams converge at one egress port, where they are
# assigned TC of, respectively, 1 and 2, with strict priority configured between
# them. In H3, we expect to see (almost) exclusively the high-priority traffic.
#
# Please see qos_mc_aware.sh for an explanation of why we use mausezahn and
# counters instead of just running iperf3.
#
# +---------------------------+ +-----------------------------+
# | H1 | | H2 |
# | $h1.111 + | | + $h2.222 |
# | 192.0.2.33/28 | | | | 192.0.2.65/28 |
# | e-qos-map 0:1 | | | | e-qos-map 0:2 |
# | | | | | |
# | $h1 + | | + $h2 |
# +-----------------|---------+ +---------|-------------------+
# | |
# +-----------------|-------------------------------------|-------------------+
# | $swp1 + + $swp2 |
# | >1Gbps | | >1Gbps |
# | +---------------|-----------+ +----------|----------------+ |
# | | $swp1.111 + | | + $swp2.222 | |
# | | BR111 | SW | BR222 | |
# | | $swp3.111 + | | + $swp3.222 | |
# | +---------------|-----------+ +----------|----------------+ |
# | \_____________________________________/ |
# | | |
# | + $swp3 |
# | | 1Gbps bottleneck |
# | | ETS: (up n->tc n for n in 0..7) |
# | | strict priority |
# +------------------------------------|--------------------------------------+
# |
# +--------------------|--------------------+
# | + $h3 H3 |
# | / \ |
# | / \ |
# | $h3.111 + + $h3.222 |
# | 192.0.2.34/28 192.0.2.66/28 |
# +-----------------------------------------+
ALL_TESTS="
ping_ipv4
test_ets_strict
"
lib_dir=$(dirname $0)/../../../net/forwarding
NUM_NETIFS=6
source $lib_dir/lib.sh
source $lib_dir/devlink_lib.sh
source qos_lib.sh
h1_create()
{
simple_if_init $h1
mtu_set $h1 10000
vlan_create $h1 111 v$h1 192.0.2.33/28
ip link set dev $h1.111 type vlan egress-qos-map 0:1
}
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 $h2 222 v$h2 192.0.2.65/28
ip link set dev $h2.222 type vlan egress-qos-map 0:2
}
h2_destroy()
{
vlan_destroy $h2 222
mtu_restore $h2
simple_if_fini $h2
}
h3_create()
{
simple_if_init $h3
mtu_set $h3 10000
vlan_create $h3 111 v$h3 192.0.2.34/28
vlan_create $h3 222 v$h3 192.0.2.66/28
}
h3_destroy()
{
vlan_destroy $h3 222
vlan_destroy $h3 111
mtu_restore $h3
simple_if_fini $h3
}
switch_create()
{
ip link set dev $swp1 up
mtu_set $swp1 10000
ip link set dev $swp2 up
mtu_set $swp2 10000
# prio n -> TC n, strict scheduling
lldptool -T -i $swp3 -V ETS-CFG up2tc=0:0,1:1,2:2,3:3,4:4,5:5,6:6,7:7
lldptool -T -i $swp3 -V ETS-CFG tsa=$(
)"0:strict,"$(
)"1:strict,"$(
)"2:strict,"$(
)"3:strict,"$(
)"4:strict,"$(
)"5:strict,"$(
)"6:strict,"$(
)"7:strict"
sleep 1
ip link set dev $swp3 up
mtu_set $swp3 10000
ethtool -s $swp3 speed 1000 autoneg off
vlan_create $swp1 111
vlan_create $swp2 222
vlan_create $swp3 111
vlan_create $swp3 222
ip link add name br111 up type bridge vlan_filtering 0
ip link set dev $swp1.111 master br111
ip link set dev $swp3.111 master br111
ip link add name br222 up type bridge vlan_filtering 0
ip link set dev $swp2.222 master br222
ip link set dev $swp3.222 master br222
# Make sure that ingress quotas are smaller than egress so that there is
# room for both streams of traffic to be admitted to shared buffer.
devlink_pool_size_thtype_set 0 dynamic 10000000
devlink_pool_size_thtype_set 4 dynamic 10000000
devlink_port_pool_th_set $swp1 0 6
devlink_tc_bind_pool_th_set $swp1 1 ingress 0 6
devlink_port_pool_th_set $swp2 0 6
devlink_tc_bind_pool_th_set $swp2 2 ingress 0 6
devlink_tc_bind_pool_th_set $swp3 1 egress 4 7
devlink_tc_bind_pool_th_set $swp3 2 egress 4 7
devlink_port_pool_th_set $swp3 4 7
}
switch_destroy()
{
devlink_port_pool_th_restore $swp3 4
devlink_tc_bind_pool_th_restore $swp3 2 egress
devlink_tc_bind_pool_th_restore $swp3 1 egress
devlink_tc_bind_pool_th_restore $swp2 2 ingress
devlink_port_pool_th_restore $swp2 0
devlink_tc_bind_pool_th_restore $swp1 1 ingress
devlink_port_pool_th_restore $swp1 0
devlink_pool_size_thtype_restore 4
devlink_pool_size_thtype_restore 0
ip link del dev br222
ip link del dev br111
vlan_destroy $swp3 222
vlan_destroy $swp3 111
vlan_destroy $swp2 222
vlan_destroy $swp1 111
ethtool -s $swp3 autoneg on
mtu_restore $swp3
ip link set dev $swp3 down
lldptool -T -i $swp3 -V ETS-CFG up2tc=0:0,1:0,2:0,3:0,4:0,5:0,6:0,7:0
mtu_restore $swp2
ip link set dev $swp2 down
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]}
h3=${NETIFS[p6]}
h3mac=$(mac_get $h3)
vrf_prepare
h1_create
h2_create
h3_create
switch_create
}
cleanup()
{
pre_cleanup
switch_destroy
h3_destroy
h2_destroy
h1_destroy
vrf_cleanup
}
ping_ipv4()
{
ping_test $h1 192.0.2.34 " from H1"
ping_test $h2 192.0.2.66 " from H2"
}
rel()
{
local old=$1; shift
local new=$1; shift
bc <<< "
scale=2
ret = 100 * $new / $old
if (ret > 0) { ret } else { 0 }
"
}
test_ets_strict()
{
RET=0
# Run high-prio traffic on its own.
start_traffic $h2.222 192.0.2.65 192.0.2.66 $h3mac
local -a rate_2
rate_2=($(measure_rate $swp2 $h3 rx_octets_prio_2 "prio 2"))
check_err $? "Could not get high enough prio-2 ingress rate"
local rate_2_in=${rate_2[0]}
local rate_2_eg=${rate_2[1]}
stop_traffic # $h2.222
# Start low-prio stream.
start_traffic $h1.111 192.0.2.33 192.0.2.34 $h3mac
local -a rate_1
rate_1=($(measure_rate $swp1 $h3 rx_octets_prio_1 "prio 1"))
check_err $? "Could not get high enough prio-1 ingress rate"
local rate_1_in=${rate_1[0]}
local rate_1_eg=${rate_1[1]}
# High-prio and low-prio on their own should have about the same
# throughput.
local rel21=$(rel $rate_1_eg $rate_2_eg)
check_err $(bc <<< "$rel21 < 95")
check_err $(bc <<< "$rel21 > 105")
# Start the high-prio stream--now both streams run.
start_traffic $h2.222 192.0.2.65 192.0.2.66 $h3mac
rate_3=($(measure_rate $swp2 $h3 rx_octets_prio_2 "prio 2 w/ 1"))
check_err $? "Could not get high enough prio-2 ingress rate with prio-1"
local rate_3_in=${rate_3[0]}
local rate_3_eg=${rate_3[1]}
stop_traffic # $h2.222
stop_traffic # $h1.111
# High-prio should have about the same throughput whether or not
# low-prio is in the system.
local rel32=$(rel $rate_2_eg $rate_3_eg)
check_err $(bc <<< "$rel32 < 95")
log_test "strict priority"
echo "Ingress to switch:"
echo " p1 in rate $(humanize $rate_1_in)"
echo " p2 in rate $(humanize $rate_2_in)"
echo " p2 in rate w/ p1 $(humanize $rate_3_in)"
echo "Egress from switch:"
echo " p1 eg rate $(humanize $rate_1_eg)"
echo " p2 eg rate $(humanize $rate_2_eg) ($rel21% of p1)"
echo " p2 eg rate w/ p1 $(humanize $rate_3_eg) ($rel32% of p2)"
}
trap cleanup EXIT
setup_prepare
setup_wait
tests_run
exit $EXIT_STATUS