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#!/bin/bash
# SPDX-License-Identifier: GPL-2.0
#
# Script will generate one flow per thread (-t N)
# - Same destination IP
# - Fake source IPs for each flow (fixed based on thread number)
#
# Useful for scale testing on receiver, to see whether silo'ing flows
# works and scales. For optimal scalability (on receiver) each
# separate-flow should not access shared variables/data. This script
# helps magnify any of these scaling issues by overloading the receiver.
#
basedir=`dirname $0`
source ${basedir}/functions.sh
root_check_run_with_sudo "$@"
# Parameter parsing via include
source ${basedir}/parameters.sh
# Set some default params, if they didn't get set
[ -z "$DEST_IP" ] && DEST_IP="198.18.0.42"
[ -z "$DST_MAC" ] && DST_MAC="90:e2:ba:ff:ff:ff"
[ -z "$CLONE_SKB" ] && CLONE_SKB="0"
[ -z "$BURST" ] && BURST=32
[ -z "$COUNT" ] && COUNT="0" # Zero means indefinitely
if [ -n "$DEST_IP" ]; then
validate_addr $DEST_IP
read -r DST_MIN DST_MAX <<< $(parse_addr $DEST_IP)
fi
if [ -n "$DST_PORT" ]; then
read -r UDP_DST_MIN UDP_DST_MAX <<< $(parse_ports $DST_PORT)
validate_ports $UDP_DST_MIN $UDP_DST_MAX
fi
# General cleanup everything since last run
[ -z "$APPEND" ] && pg_ctrl "reset"
# Threads are specified with parameter -t value in $THREADS
for ((thread = $F_THREAD; thread <= $L_THREAD; thread++)); do
dev=${DEV}@${thread}
# Add remove all other devices and add_device $dev to thread
[ -z "$APPEND" ] && pg_thread $thread "rem_device_all"
pg_thread $thread "add_device" $dev
# Base config
pg_set $dev "flag QUEUE_MAP_CPU"
pg_set $dev "count $COUNT"
pg_set $dev "clone_skb $CLONE_SKB"
pg_set $dev "pkt_size $PKT_SIZE"
pg_set $dev "delay $DELAY"
pg_set $dev "flag NO_TIMESTAMP"
# Single destination
pg_set $dev "dst_mac $DST_MAC"
pg_set $dev "dst_min $DST_MIN"
pg_set $dev "dst_max $DST_MAX"
if [ -n "$DST_PORT" ]; then
# Single destination port or random port range
pg_set $dev "flag UDPDST_RND"
pg_set $dev "udp_dst_min $UDP_DST_MIN"
pg_set $dev "udp_dst_max $UDP_DST_MAX"
fi
[ ! -z "$UDP_CSUM" ] && pg_set $dev "flag UDPCSUM"
# Setup source IP-addresses based on thread number
pg_set $dev "src_min 198.18.$((thread+1)).1"
pg_set $dev "src_max 198.18.$((thread+1)).1"
# Setup burst, for easy testing -b 0 disable bursting
# (internally in pktgen default and minimum burst=1)
if [[ ${BURST} -ne 0 ]]; then
pg_set $dev "burst $BURST"
else
info "$dev: Not using burst"
fi
done
# Run if user hits control-c
function print_result() {
# Print results
for ((thread = $F_THREAD; thread <= $L_THREAD; thread++)); do
dev=${DEV}@${thread}
echo "Device: $dev"
cat /proc/net/pktgen/$dev | grep -A2 "Result:"
done
}
# trap keyboard interrupt (Ctrl-C)
trap true SIGINT
if [ -z "$APPEND" ]; then
echo "Running... ctrl^C to stop" >&2
pg_ctrl "start"
print_result
else
echo "Append mode: config done. Do more or use 'pg_ctrl start' to run"
fi
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