LXR linux/samples/pktgen/pktgen_sample05_flow_per

   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#
  13basedir=`dirname $0`
  14source ${basedir}/functions.sh
  15root_check_run_with_sudo "$@"
  16
  17# Parameter parsing via include
  18source ${basedir}/parameters.sh
  19# Set some default params, if they didn't get set
  20[ -z "$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
  25if [ -n "$DEST_IP" ]; then
  26    validate_addr $DEST_IP
  27    read -r DST_MIN DST_MAX <<< $(parse_addr $DEST_IP)
  28fi
  29if [ -n "$DST_PORT" ]; then
  30    read -r UDP_DST_MIN UDP_DST_MAX <<< $(parse_ports $DST_PORT)
  31    validate_ports $UDP_DST_MIN $UDP_DST_MAX
  32fi
  33
  34# General cleanup everything since last run
  35[ -z "$APPEND" ] && pg_ctrl "reset"
  36
  37# Threads are specified with parameter -t value in $THREADS
  38for ((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
  77done
  78
  79# Run if user hits control-c
  80function 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)
  89trap true SIGINT
  90
  91if [ -z "$APPEND" ]; then
  92    echo "Running... ctrl^C to stop" >&2
  93    pg_ctrl "start"
  94
  95    print_result
  96else
  97    echo "Append mode: config done. Do more or use 'pg_ctrl start' to run"
  98fi
  99