tools/testing/selftests/net/forwarding/sch_ets_tests.sh

   1 # SPDX-License-Identifier: GPL-2.0
   2
   3 # Global interface:
   4 #  $put -- port under test (e.g. $swp2)
   5 #  collect_stats($streams...) -- A function to get stats for individual streams
   6 #  ets_start_traffic($band) -- Start traffic for this band
   7 #  ets_change_qdisc($op, $dev, $nstrict, $quanta...) -- Add or change qdisc
   8
   9 # WS describes the Qdisc configuration. It has one value per band (so the
  10 # number of array elements indicates the number of bands). If the value is
  11 # 0, it is a strict band, otherwise the it's a DRR band and the value is
  12 # that band's quantum.
  13 declare -a WS
  14
  15 qdisc_describe()
  16 {
  17         local nbands=${#WS[@]}
  18         local nstrict=0
  19         local i
  20
  21         for ((i = 0; i < nbands; i++)); do
  22                 if ((!${WS[$i]})); then
  23                         : $((nstrict++))
  24                 fi
  25         done
  26
  27         echo -n "ets bands $nbands"
  28         if ((nstrict)); then
  29                 echo -n " strict $nstrict"
  30         fi
  31         if ((nstrict < nbands)); then
  32                 echo -n " quanta"
  33                 for ((i = nstrict; i < nbands; i++)); do
  34                         echo -n " ${WS[$i]}"
  35                 done
  36         fi
  37 }
  38
  39 __strict_eval()
  40 {
  41         local desc=$1; shift
  42         local d=$1; shift
  43         local total=$1; shift
  44         local above=$1; shift
  45
  46         RET=0
  47
  48         if ((! total)); then
  49                 check_err 1 "No traffic observed"
  50                 log_test "$desc"
  51                 return
  52         fi
  53
  54         local ratio=$(echo "scale=2; 100 * $d / $total" | bc -l)
  55         if ((above)); then
  56                 test $(echo "$ratio > 95.0" | bc -l) -eq 1
  57                 check_err $? "Not enough traffic"
  58                 log_test "$desc"
  59                 log_info "Expected ratio >95% Measured ratio $ratio"
  60         else
  61                 test $(echo "$ratio < 5" | bc -l) -eq 1
  62                 check_err $? "Too much traffic"
  63                 log_test "$desc"
  64                 log_info "Expected ratio <5% Measured ratio $ratio"
  65         fi
  66 }
  67
  68 strict_eval()
  69 {
  70         __strict_eval "$@" 1
  71 }
  72
  73 notraf_eval()
  74 {
  75         __strict_eval "$@" 0
  76 }
  77
  78 __ets_dwrr_test()
  79 {
  80         local -a streams=("$@")
  81
  82         local low_stream=${streams[0]}
  83         local seen_strict=0
  84         local -a t0 t1 d
  85         local stream
  86         local total
  87         local i
  88
  89         echo "Testing $(qdisc_describe), streams ${streams[@]}"
  90
  91         for stream in ${streams[@]}; do
  92                 ets_start_traffic $stream
  93         done
  94
  95         sleep 10
  96
  97         t0=($(collect_stats "${streams[@]}"))
  98
  99         sleep 10
 100
 101         t1=($(collect_stats "${streams[@]}"))
 102         d=($(for ((i = 0; i < ${#streams[@]}; i++)); do
 103                  echo $((${t1[$i]} - ${t0[$i]}))
 104              done))
 105         total=$(echo ${d[@]} | sed 's/ /+/g' | bc)
 106
 107         for ((i = 0; i < ${#streams[@]}; i++)); do
 108                 local stream=${streams[$i]}
 109                 if ((seen_strict)); then
 110                         notraf_eval "band $stream" ${d[$i]} $total
 111                 elif ((${WS[$stream]} == 0)); then
 112                         strict_eval "band $stream" ${d[$i]} $total
 113                         seen_strict=1
 114                 elif ((stream == low_stream)); then
 115                         # Low stream is used as DWRR evaluation reference.
 116                         continue
 117                 else
 118                         multipath_eval "bands $low_stream:$stream" \
 119                                        ${WS[$low_stream]} ${WS[$stream]} \
 120                                        ${d[0]} ${d[$i]}
 121                 fi
 122         done
 123
 124         for stream in ${streams[@]}; do
 125                 stop_traffic
 126         done
 127 }
 128
 129 ets_dwrr_test_012()
 130 {
 131         __ets_dwrr_test 0 1 2
 132 }
 133
 134 ets_dwrr_test_01()
 135 {
 136         __ets_dwrr_test 0 1
 137 }
 138
 139 ets_dwrr_test_12()
 140 {
 141         __ets_dwrr_test 1 2
 142 }
 143
 144 ets_qdisc_setup()
 145 {
 146         local dev=$1; shift
 147         local nstrict=$1; shift
 148         local -a quanta=("$@")
 149
 150         local ndwrr=${#quanta[@]}
 151         local nbands=$((nstrict + ndwrr))
 152         local nstreams=$(if ((nbands > 3)); then echo 3; else echo $nbands; fi)
 153         local priomap=$(seq 0 $((nstreams - 1)))
 154         local i
 155
 156         WS=($(
 157                 for ((i = 0; i < nstrict; i++)); do
 158                         echo 0
 159                 done
 160                 for ((i = 0; i < ndwrr; i++)); do
 161                         echo ${quanta[$i]}
 162                 done
 163         ))
 164
 165         ets_change_qdisc $dev $nstrict "$priomap" ${quanta[@]}
 166 }
 167
 168 ets_set_dwrr_uniform()
 169 {
 170         ets_qdisc_setup $put 0 3300 3300 3300
 171 }
 172
 173 ets_set_dwrr_varying()
 174 {
 175         ets_qdisc_setup $put 0 5000 3500 1500
 176 }
 177
 178 ets_set_strict()
 179 {
 180         ets_qdisc_setup $put 3
 181 }
 182
 183 ets_set_mixed()
 184 {
 185         ets_qdisc_setup $put 1 5000 2500 1500
 186 }
 187
 188 ets_change_quantum()
 189 {
 190         tc class change dev $put classid 10:2 ets quantum 8000
 191         WS[1]=8000
 192 }
 193
 194 ets_set_dwrr_two_bands()
 195 {
 196         ets_qdisc_setup $put 0 5000 2500
 197 }
 198
 199 ets_test_strict()
 200 {
 201         ets_set_strict
 202         ets_dwrr_test_01
 203         ets_dwrr_test_12
 204 }
 205
 206 ets_test_mixed()
 207 {
 208         ets_set_mixed
 209         ets_dwrr_test_01
 210         ets_dwrr_test_12
 211 }
 212
 213 ets_test_dwrr()
 214 {
 215         ets_set_dwrr_uniform
 216         ets_dwrr_test_012
 217         ets_set_dwrr_varying
 218         ets_dwrr_test_012
 219         ets_change_quantum
 220         ets_dwrr_test_012
 221         ets_set_dwrr_two_bands
 222         ets_dwrr_test_01
 223 }