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# SPDX-License-Identifier: GPL-2.0
# Global interface:
# $put -- port under test (e.g. $swp2)
# collect_stats($streams...) -- A function to get stats for individual streams
# ets_start_traffic($band) -- Start traffic for this band
# ets_change_qdisc($op, $dev, $nstrict, $quanta...) -- Add or change qdisc
# WS describes the Qdisc configuration. It has one value per band (so the
# number of array elements indicates the number of bands). If the value is
# 0, it is a strict band, otherwise the it's a DRR band and the value is
# that band's quantum.
declare -a WS
qdisc_describe()
{
local nbands=${#WS[@]}
local nstrict=0
local i
for ((i = 0; i < nbands; i++)); do
if ((!${WS[$i]})); then
: $((nstrict++))
fi
done
echo -n "ets bands $nbands"
if ((nstrict)); then
echo -n " strict $nstrict"
fi
if ((nstrict < nbands)); then
echo -n " quanta"
for ((i = nstrict; i < nbands; i++)); do
echo -n " ${WS[$i]}"
done
fi
}
__strict_eval()
{
local desc=$1; shift
local d=$1; shift
local total=$1; shift
local above=$1; shift
RET=0
if ((! total)); then
check_err 1 "No traffic observed"
log_test "$desc"
return
fi
local ratio=$(echo "scale=2; 100 * $d / $total" | bc -l)
if ((above)); then
test $(echo "$ratio > 95.0" | bc -l) -eq 1
check_err $? "Not enough traffic"
log_test "$desc"
log_info "Expected ratio >95% Measured ratio $ratio"
else
test $(echo "$ratio < 5" | bc -l) -eq 1
check_err $? "Too much traffic"
log_test "$desc"
log_info "Expected ratio <5% Measured ratio $ratio"
fi
}
strict_eval()
{
__strict_eval "$@" 1
}
notraf_eval()
{
__strict_eval "$@" 0
}
__ets_dwrr_test()
{
local -a streams=("$@")
local low_stream=${streams[0]}
local seen_strict=0
local -a t0 t1 d
local stream
local total
local i
echo "Testing $(qdisc_describe), streams ${streams[@]}"
for stream in ${streams[@]}; do
ets_start_traffic $stream
done
sleep 10
t0=($(collect_stats "${streams[@]}"))
sleep 10
t1=($(collect_stats "${streams[@]}"))
d=($(for ((i = 0; i < ${#streams[@]}; i++)); do
echo $((${t1[$i]} - ${t0[$i]}))
done))
total=$(echo ${d[@]} | sed 's/ /+/g' | bc)
for ((i = 0; i < ${#streams[@]}; i++)); do
local stream=${streams[$i]}
if ((seen_strict)); then
notraf_eval "band $stream" ${d[$i]} $total
elif ((${WS[$stream]} == 0)); then
strict_eval "band $stream" ${d[$i]} $total
seen_strict=1
elif ((stream == low_stream)); then
# Low stream is used as DWRR evaluation reference.
continue
else
multipath_eval "bands $low_stream:$stream" \
${WS[$low_stream]} ${WS[$stream]} \
${d[0]} ${d[$i]}
fi
done
for stream in ${streams[@]}; do
stop_traffic
done
}
ets_dwrr_test_012()
{
__ets_dwrr_test 0 1 2
}
ets_dwrr_test_01()
{
__ets_dwrr_test 0 1
}
ets_dwrr_test_12()
{
__ets_dwrr_test 1 2
}
ets_qdisc_setup()
{
local dev=$1; shift
local nstrict=$1; shift
local -a quanta=("$@")
local ndwrr=${#quanta[@]}
local nbands=$((nstrict + ndwrr))
local nstreams=$(if ((nbands > 3)); then echo 3; else echo $nbands; fi)
local priomap=$(seq 0 $((nstreams - 1)))
local i
WS=($(
for ((i = 0; i < nstrict; i++)); do
echo 0
done
for ((i = 0; i < ndwrr; i++)); do
echo ${quanta[$i]}
done
))
ets_change_qdisc $dev $nstrict "$priomap" ${quanta[@]}
}
ets_set_dwrr_uniform()
{
ets_qdisc_setup $put 0 3300 3300 3300
}
ets_set_dwrr_varying()
{
ets_qdisc_setup $put 0 5000 3500 1500
}
ets_set_strict()
{
ets_qdisc_setup $put 3
}
ets_set_mixed()
{
ets_qdisc_setup $put 1 5000 2500 1500
}
ets_change_quantum()
{
tc class change dev $put classid 10:2 ets quantum 8000
WS[1]=8000
}
ets_set_dwrr_two_bands()
{
ets_qdisc_setup $put 0 5000 2500
}
ets_test_strict()
{
ets_set_strict
ets_dwrr_test_01
ets_dwrr_test_12
}
ets_test_mixed()
{
ets_set_mixed
ets_dwrr_test_01
ets_dwrr_test_12
}
ets_test_dwrr()
{
ets_set_dwrr_uniform
ets_dwrr_test_012
ets_set_dwrr_varying
ets_dwrr_test_012
ets_change_quantum
ets_dwrr_test_012
ets_set_dwrr_two_bands
ets_dwrr_test_01
}
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