samples/pktgen/pktgen_sample05_flow_per_thread.sh

   1 #!/bin/bash
   2 # SPDX-License-Identifier: GPL-2.0
   3 #
   4 # Script will generate one flow per thread (-t N)
   5 #  - Same destination IP
   6 #  - Fake source IPs for each flow (fixed based on thread number)
   7 #
   8 # Useful for scale testing on receiver, to see whether silo'ing flows
   9 # works and scales.  For optimal scalability (on receiver) each
  10 # separate-flow should not access shared variables/data. This script
  11 # helps magnify any of these scaling issues by overloading the receiver.
  12 #
  13 basedir=`dirname $0`
  14 source ${basedir}/functions.sh
  15 root_check_run_with_sudo "$@"
  16
  17 # Parameter parsing via include
  18 source ${basedir}/parameters.sh
  19 # Set some default params, if they didn't get set
  20 [ -z "$DEST_IP" ]   && DEST_IP="198.18.0.42"
  21 [ -z "$DST_MAC" ]   && DST_MAC="90:e2:ba:ff:ff:ff"
  22 [ -z "$CLONE_SKB" ] && CLONE_SKB="0"
  23 [ -z "$BURST" ]     && BURST=32
  24 [ -z "$COUNT" ]     && COUNT="0" # Zero means indefinitely
  25 if [ -n "$DEST_IP" ]; then
  26     validate_addr $DEST_IP
  27     read -r DST_MIN DST_MAX <<< $(parse_addr $DEST_IP)
  28 fi
  29 if [ -n "$DST_PORT" ]; then
  30     read -r UDP_DST_MIN UDP_DST_MAX <<< $(parse_ports $DST_PORT)
  31     validate_ports $UDP_DST_MIN $UDP_DST_MAX
  32 fi
  33
  34 # General cleanup everything since last run
  35 [ -z "$APPEND" ] && pg_ctrl "reset"
  36
  37 # Threads are specified with parameter -t value in $THREADS
  38 for ((thread = $F_THREAD; thread <= $L_THREAD; thread++)); do
  39     dev=${DEV}@${thread}
  40
  41     # Add remove all other devices and add_device $dev to thread
  42     [ -z "$APPEND" ] && pg_thread $thread "rem_device_all"
  43     pg_thread $thread "add_device" $dev
  44
  45     # Base config
  46     pg_set $dev "flag QUEUE_MAP_CPU"
  47     pg_set $dev "count $COUNT"
  48     pg_set $dev "clone_skb $CLONE_SKB"
  49     pg_set $dev "pkt_size $PKT_SIZE"
  50     pg_set $dev "delay $DELAY"
  51     pg_set $dev "flag NO_TIMESTAMP"
  52
  53     # Single destination
  54     pg_set $dev "dst_mac $DST_MAC"
  55     pg_set $dev "dst_min $DST_MIN"
  56     pg_set $dev "dst_max $DST_MAX"
  57
  58     if [ -n "$DST_PORT" ]; then
  59         # Single destination port or random port range
  60         pg_set $dev "flag UDPDST_RND"
  61         pg_set $dev "udp_dst_min $UDP_DST_MIN"
  62         pg_set $dev "udp_dst_max $UDP_DST_MAX"
  63     fi
  64
  65     # Setup source IP-addresses based on thread number
  66     pg_set $dev "src_min 198.18.$((thread+1)).1"
  67     pg_set $dev "src_max 198.18.$((thread+1)).1"
  68
  69     # Setup burst, for easy testing -b 0 disable bursting
  70     # (internally in pktgen default and minimum burst=1)
  71     if [[ ${BURST} -ne 0 ]]; then
  72         pg_set $dev "burst $BURST"
  73     else
  74         info "$dev: Not using burst"
  75     fi
  76
  77 done
  78
  79 # Run if user hits control-c
  80 function print_result() {
  81     # Print results
  82     for ((thread = $F_THREAD; thread <= $L_THREAD; thread++)); do
  83         dev=${DEV}@${thread}
  84         echo "Device: $dev"
  85         cat /proc/net/pktgen/$dev | grep -A2 "Result:"
  86     done
  87 }
  88 # trap keyboard interrupt (Ctrl-C)
  89 trap true SIGINT
  90
  91 if [ -z "$APPEND" ]; then
  92     echo "Running... ctrl^C to stop" >&2
  93     pg_ctrl "start"
  94
  95     print_result
  96 else
  97     echo "Append mode: config done. Do more or use 'pg_ctrl start' to run"
  98 fi