1#!/bin/bash 2# SPDX-License-Identifier: GPL-2.0 3# 4# Multiqueue: Using pktgen threads for sending on multiple CPUs 5# * adding devices to kernel threads 6# * notice the naming scheme for keeping device names unique 7# * nameing scheme: dev@thread_number 8# * flow variation via random UDP source port 9# 10basedir=`dirname $0` 11source ${basedir}/functions.sh 12root_check_run_with_sudo "$@" 13# 14# Required param: -i dev in $DEV 15source ${basedir}/parameters.sh 16 17[ -z "$COUNT" ] && COUNT="100000" # Zero means indefinitely 18 19# Base Config 20[ -z "$CLONE_SKB" ] && CLONE_SKB="0" 21 22# Flow variation random source port between min and max 23UDP_SRC_MIN=9 24UDP_SRC_MAX=109 25 26# (example of setting default params in your script) 27if [ -z "$DEST_IP" ]; then 28 [ -z "$IP6" ] && DEST_IP="198.18.0.42" || DEST_IP="FD00::1" 29fi 30[ -z "$DST_MAC" ] && DST_MAC="90:e2:ba:ff:ff:ff" 31if [ -n "$DEST_IP" ]; then 32 validate_addr${IP6} $DEST_IP 33 read -r DST_MIN DST_MAX <<< $(parse_addr${IP6} $DEST_IP) 34fi 35if [ -n "$DST_PORT" ]; then 36 read -r UDP_DST_MIN UDP_DST_MAX <<< $(parse_ports $DST_PORT) 37 validate_ports $UDP_DST_MIN $UDP_DST_MAX 38fi 39 40# General cleanup everything since last run 41[ -z "$APPEND" ] && pg_ctrl "reset" 42 43# Threads are specified with parameter -t value in $THREADS 44for ((thread = $F_THREAD; thread <= $L_THREAD; thread++)); do 45 # The device name is extended with @name, using thread number to 46 # make then unique, but any name will do. 47 dev=${DEV}@${thread} 48 49 # Add remove all other devices and add_device $dev to thread 50 [ -z "$APPEND" ] && pg_thread $thread "rem_device_all" 51 pg_thread $thread "add_device" $dev 52 53 # Notice config queue to map to cpu (mirrors smp_processor_id()) 54 # It is beneficial to map IRQ /proc/irq/*/smp_affinity 1:1 to CPU number 55 pg_set $dev "flag QUEUE_MAP_CPU" 56 57 # Base config of dev 58 pg_set $dev "count $COUNT" 59 pg_set $dev "clone_skb $CLONE_SKB" 60 pg_set $dev "pkt_size $PKT_SIZE" 61 pg_set $dev "delay $DELAY" 62 63 # Flag example disabling timestamping 64 pg_set $dev "flag NO_TIMESTAMP" 65 66 # Destination 67 pg_set $dev "dst_mac $DST_MAC" 68 pg_set $dev "dst${IP6}_min $DST_MIN" 69 pg_set $dev "dst${IP6}_max $DST_MAX" 70 71 if [ -n "$DST_PORT" ]; then 72 # Single destination port or random port range 73 pg_set $dev "flag UDPDST_RND" 74 pg_set $dev "udp_dst_min $UDP_DST_MIN" 75 pg_set $dev "udp_dst_max $UDP_DST_MAX" 76 fi 77 78 [ ! -z "$UDP_CSUM" ] && pg_set $dev "flag UDPCSUM" 79 80 # Setup random UDP port src range 81 pg_set $dev "flag UDPSRC_RND" 82 pg_set $dev "udp_src_min $UDP_SRC_MIN" 83 pg_set $dev "udp_src_max $UDP_SRC_MAX" 84done 85 86# Run if user hits control-c 87function print_result() { 88 # Print results 89 for ((thread = $F_THREAD; thread <= $L_THREAD; thread++)); do 90 dev=${DEV}@${thread} 91 echo "Device: $dev" 92 cat /proc/net/pktgen/$dev | grep -A2 "Result:" 93 done 94} 95# trap keyboard interrupt (Ctrl-C) 96trap true SIGINT 97 98if [ -z "$APPEND" ]; then 99 # start_run 100 echo "Running... ctrl^C to stop" >&2 101 pg_ctrl "start" 102 echo "Done" >&2 103 104 print_result 105else 106 echo "Append mode: config done. Do more or use 'pg_ctrl start' to run" 107fi 108