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selftests: mlxsw: Add qos_lib.sh

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Extract reusable code from qos_mc_aware.sh and put into a new library.

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 12:12:26 +00:00 committed by David S. Miller
parent 5dde21b3a7
commit 573363a68f
2 changed files with 109 additions and 92 deletions
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98
tools/testing/selftests/drivers/net/mlxsw/qos_lib.sh Normal file
View File

@ -0,0 +1,98 @@
# SPDX-License-Identifier: GPL-2.0
humanize()
{
local speed=$1; shift
for unit in bps Kbps Mbps Gbps; do
if (($(echo "$speed < 1024" | bc))); then
break
fi
speed=$(echo "scale=1; $speed / 1024" | bc)
done
echo "$speed${unit}"
}
rate()
{
local t0=$1; shift
local t1=$1; shift
local interval=$1; shift
echo $((8 * (t1 - t0) / interval))
}
start_traffic()
{
local h_in=$1; shift # Where the traffic egresses the host
local sip=$1; shift
local dip=$1; shift
local dmac=$1; shift
$MZ $h_in -p 8000 -A $sip -B $dip -c 0 \
-a own -b $dmac -t udp -q &
sleep 1
}
stop_traffic()
{
# Suppress noise from killing mausezahn.
{ kill %% && wait %%; } 2>/dev/null
}
check_rate()
{
local rate=$1; shift
local min=$1; shift
local what=$1; shift
if ((rate > min)); then
return 0
fi
echo "$what $(humanize $ir) < $(humanize $min)" > /dev/stderr
return 1
}
measure_rate()
{
local sw_in=$1; shift # Where the traffic ingresses the switch
local host_in=$1; shift # Where it ingresses another host
local counter=$1; shift # Counter to use for measurement
local what=$1; shift
local interval=10
local i
local ret=0
# Dips in performance might cause momentary ingress rate to drop below
# 1Gbps. That wouldn't saturate egress and MC would thus get through,
# seemingly winning bandwidth on account of UC. Demand at least 2Gbps
# average ingress rate to somewhat mitigate this.
local min_ingress=2147483648
for i in {5..0}; do
local t0=$(ethtool_stats_get $host_in $counter)
local u0=$(ethtool_stats_get $sw_in $counter)
sleep $interval
local t1=$(ethtool_stats_get $host_in $counter)
local u1=$(ethtool_stats_get $sw_in $counter)
local ir=$(rate $u0 $u1 $interval)
local er=$(rate $t0 $t1 $interval)
if check_rate $ir $min_ingress "$what ingress rate"; then
break
fi
# Fail the test if we can't get the throughput.
if ((i == 0)); then
ret=1
fi
done
echo $ir $er
return $ret
}

103
tools/testing/selftests/drivers/net/mlxsw/qos_mc_aware.sh
View File

@ -68,6 +68,7 @@ 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()
{
@ -220,107 +221,28 @@ ping_ipv4()
ping_test $h2 192.0.2.130
}
humanize()
{
local speed=$1; shift
for unit in bps Kbps Mbps Gbps; do
if (($(echo "$speed < 1024" | bc))); then
break
fi
speed=$(echo "scale=1; $speed / 1024" | bc)
done
echo "$speed${unit}"
}
rate()
{
local t0=$1; shift
local t1=$1; shift
local interval=$1; shift
echo $((8 * (t1 - t0) / interval))
}
check_rate()
{
local rate=$1; shift
local min=$1; shift
local what=$1; shift
if ((rate > min)); then
return 0
fi
echo "$what $(humanize $ir) < $(humanize $min_ingress)" > /dev/stderr
return 1
}
measure_uc_rate()
{
local what=$1; shift
local interval=10
local i
local ret=0
# Dips in performance might cause momentary ingress rate to drop below
# 1Gbps. That wouldn't saturate egress and MC would thus get through,
# seemingly winning bandwidth on account of UC. Demand at least 2Gbps
# average ingress rate to somewhat mitigate this.
local min_ingress=2147483648
$MZ $h2.111 -p 8000 -A 192.0.2.129 -B 192.0.2.130 -c 0 \
-a own -b $h3mac -t udp -q &
sleep 1
for i in {5..0}; do
local t0=$(ethtool_stats_get $h3 rx_octets_prio_1)
local u0=$(ethtool_stats_get $swp2 rx_octets_prio_1)
sleep $interval
local t1=$(ethtool_stats_get $h3 rx_octets_prio_1)
local u1=$(ethtool_stats_get $swp2 rx_octets_prio_1)
local ir=$(rate $u0 $u1 $interval)
local er=$(rate $t0 $t1 $interval)
if check_rate $ir $min_ingress "$what ingress rate"; then
break
fi
# Fail the test if we can't get the throughput.
if ((i == 0)); then
ret=1
fi
done
# Suppress noise from killing mausezahn.
{ kill %% && wait; } 2>/dev/null
echo $ir $er
exit $ret
}
test_mc_aware()
{
RET=0
local -a uc_rate
uc_rate=($(measure_uc_rate "UC-only"))
start_traffic $h2.111 192.0.2.129 192.0.2.130 $h3mac
uc_rate=($(measure_rate $swp2 $h3 rx_octets_prio_1 "UC-only"))
check_err $? "Could not get high enough UC-only ingress rate"
stop_traffic
local ucth1=${uc_rate[1]}
$MZ $h1 -p 8000 -c 0 -a own -b bc -t udp -q &
start_traffic $h1 own bc bc
local d0=$(date +%s)
local t0=$(ethtool_stats_get $h3 rx_octets_prio_0)
local u0=$(ethtool_stats_get $swp1 rx_octets_prio_0)
local -a uc_rate_2
uc_rate_2=($(measure_uc_rate "UC+MC"))
start_traffic $h2.111 192.0.2.129 192.0.2.130 $h3mac
uc_rate_2=($(measure_rate $swp2 $h3 rx_octets_prio_1 "UC+MC"))
check_err $? "Could not get high enough UC+MC ingress rate"
stop_traffic
local ucth2=${uc_rate_2[1]}
local d1=$(date +%s)
@ -338,8 +260,7 @@ test_mc_aware()
local mc_ir=$(rate $u0 $u1 $interval)
local mc_er=$(rate $t0 $t1 $interval)
# Suppress noise from killing mausezahn.
{ kill %% && wait; } 2>/dev/null
stop_traffic
log_test "UC performace under MC overload"
@ -363,8 +284,7 @@ test_uc_aware()
{
RET=0
$MZ $h2.111 -p 8000 -A 192.0.2.129 -B 192.0.2.130 -c 0 \
-a own -b $h3mac -t udp -q &
start_traffic $h2.111 192.0.2.129 192.0.2.130 $h3mac
local d0=$(date +%s)
local t0=$(ethtool_stats_get $h3 rx_octets_prio_1)
@ -394,8 +314,7 @@ test_uc_aware()
((attempts == passes))
check_err $?
# Suppress noise from killing mausezahn.
{ kill %% && wait; } 2>/dev/null
stop_traffic
log_test "MC performace under UC overload"
echo " ingress UC throughput $(humanize ${uc_ir})"