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# Base Config
  35DELAY="0"  # Zero means max speed
  36
  37# General cleanup everything since last run
  38pg_ctrl "reset"
  39
  40# Threads are specified with parameter -t value in $THREADS
  41for ((thread = $F_THREAD; thread <= $L_THREAD; thread++)); do
  42    dev=${DEV}@${thread}
  43
  44    # Add remove all other devices and add_device $dev to thread
  45    pg_thread $thread "rem_device_all"
  46    pg_thread $thread "add_device" $dev
  47
  48    # Base config
  49    pg_set $dev "flag QUEUE_MAP_CPU"
  50    pg_set $dev "count $COUNT"
  51    pg_set $dev "clone_skb $CLONE_SKB"
  52    pg_set $dev "pkt_size $PKT_SIZE"
  53    pg_set $dev "delay $DELAY"
  54    pg_set $dev "flag NO_TIMESTAMP"
  55
  56    # Single destination
  57    pg_set $dev "dst_mac $DST_MAC"
  58    pg_set $dev "dst_min $DST_MIN"
  59    pg_set $dev "dst_max $DST_MAX"
  60
  61    if [ -n "$DST_PORT" ]; then
  62        # Single destination port or random port range
  63        pg_set $dev "flag UDPDST_RND"
  64        pg_set $dev "udp_dst_min $UDP_DST_MIN"
  65        pg_set $dev "udp_dst_max $UDP_DST_MAX"
  66    fi
  67
  68    # Setup source IP-addresses based on thread number
  69    pg_set $dev "src_min 198.18.$((thread+1)).1"
  70    pg_set $dev "src_max 198.18.$((thread+1)).1"
  71
  72    # Setup burst, for easy testing -b 0 disable bursting
  73    # (internally in pktgen default and minimum burst=1)
  74    if [[ ${BURST} -ne 0 ]]; then
  75        pg_set $dev "burst $BURST"
  76    else
  77        info "$dev: Not using burst"
  78    fi
  79
  80done
  81
  82# Run if user hits control-c
  83function print_result() {
  84    # Print results
  85    for ((thread = $F_THREAD; thread <= $L_THREAD; thread++)); do
  86        dev=${DEV}@${thread}
  87        echo "Device: $dev"
  88        cat /proc/net/pktgen/$dev | grep -A2 "Result:"
  89    done
  90}
  91# trap keyboard interrupt (Ctrl-C)
  92trap true SIGINT
  93
  94echo "Running... ctrl^C to stop" >&2
  95pg_ctrl "start"
  96
  97print_result
  98