1#!/bin/bash 2# 3# Multiqueue: Using pktgen threads for sending on multiple CPUs 4# * adding devices to kernel threads which are in the same NUMA node 5# * bound devices queue's irq affinity to the threads, 1:1 mapping 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 ${basedir}/parameters.sh 16 17# Trap EXIT first 18trap_exit 19 20# Base Config 21[ -z "$COUNT" ] && COUNT="20000000" # Zero means indefinitely 22[ -z "$CLONE_SKB" ] && CLONE_SKB="0" 23 24# Flow variation random source port between min and max 25UDP_SRC_MIN=9 26UDP_SRC_MAX=109 27 28node=`get_iface_node $DEV` 29irq_array=(`get_iface_irqs $DEV`) 30cpu_array=(`get_node_cpus $node`) 31 32[ $THREADS -gt ${#irq_array[*]} -o $THREADS -gt ${#cpu_array[*]} ] && \ 33 err 1 "Thread number $THREADS exceeds: min (${#irq_array[*]},${#cpu_array[*]})" 34 35# (example of setting default params in your script) 36if [ -z "$DEST_IP" ]; then 37 [ -z "$IP6" ] && DEST_IP="198.18.0.42" || DEST_IP="FD00::1" 38fi 39[ -z "$DST_MAC" ] && DST_MAC="90:e2:ba:ff:ff:ff" 40if [ -n "$DEST_IP" ]; then 41 validate_addr${IP6} $DEST_IP 42 read -r DST_MIN DST_MAX <<< $(parse_addr${IP6} $DEST_IP) 43fi 44if [ -n "$DST_PORT" ]; then 45 read -r UDP_DST_MIN UDP_DST_MAX <<< $(parse_ports $DST_PORT) 46 validate_ports $UDP_DST_MIN $UDP_DST_MAX 47fi 48 49# General cleanup everything since last run 50[ -z "$APPEND" ] && pg_ctrl "reset" 51 52# Threads are specified with parameter -t value in $THREADS 53for ((i = 0; i < $THREADS; i++)); do 54 # The device name is extended with @name, using thread number to 55 # make then unique, but any name will do. 56 # Set the queue's irq affinity to this $thread (processor) 57 # if '-f' is designated, offset cpu id 58 thread=${cpu_array[$((i+F_THREAD))]} 59 dev=${DEV}@${thread} 60 echo $thread > /proc/irq/${irq_array[$i]}/smp_affinity_list 61 info "irq ${irq_array[$i]} is set affinity to `cat /proc/irq/${irq_array[$i]}/smp_affinity_list`" 62 63 # Add remove all other devices and add_device $dev to thread 64 [ -z "$APPEND" ] && pg_thread $thread "rem_device_all" 65 pg_thread $thread "add_device" $dev 66 67 # select queue and bind the queue and $dev in 1:1 relationship 68 queue_num=$i 69 info "queue number is $queue_num" 70 pg_set $dev "queue_map_min $queue_num" 71 pg_set $dev "queue_map_max $queue_num" 72 73 # Notice config queue to map to cpu (mirrors smp_processor_id()) 74 # It is beneficial to map IRQ /proc/irq/*/smp_affinity 1:1 to CPU number 75 pg_set $dev "flag QUEUE_MAP_CPU" 76 77 # Base config of dev 78 pg_set $dev "count $COUNT" 79 pg_set $dev "clone_skb $CLONE_SKB" 80 pg_set $dev "pkt_size $PKT_SIZE" 81 pg_set $dev "delay $DELAY" 82 83 # Flag example disabling timestamping 84 pg_set $dev "flag NO_TIMESTAMP" 85 86 # Destination 87 pg_set $dev "dst_mac $DST_MAC" 88 pg_set $dev "dst${IP6}_min $DST_MIN" 89 pg_set $dev "dst${IP6}_max $DST_MAX" 90 91 if [ -n "$DST_PORT" ]; then 92 # Single destination port or random port range 93 pg_set $dev "flag UDPDST_RND" 94 pg_set $dev "udp_dst_min $UDP_DST_MIN" 95 pg_set $dev "udp_dst_max $UDP_DST_MAX" 96 fi 97 98 [ ! -z "$UDP_CSUM" ] && pg_set $dev "flag UDPCSUM" 99 100 # Setup random UDP port src range 101 pg_set $dev "flag UDPSRC_RND" 102 pg_set $dev "udp_src_min $UDP_SRC_MIN" 103 pg_set $dev "udp_src_max $UDP_SRC_MAX" 104done 105 106# Run if user hits control-c 107function print_result() { 108 # Print results 109 for ((i = 0; i < $THREADS; i++)); do 110 thread=${cpu_array[$((i+F_THREAD))]} 111 dev=${DEV}@${thread} 112 echo "Device: $dev" 113 cat /proc/net/pktgen/$dev | grep -A2 "Result:" 114 done 115} 116# trap keyboard interrupt (Ctrl-C) 117trap true SIGINT 118 119# start_run 120if [ -z "$APPEND" ]; then 121 echo "Running... ctrl^C to stop" >&2 122 pg_ctrl "start" 123 echo "Done" >&2 124 125 print_result 126else 127 echo "Append mode: config done. Do more or use 'pg_ctrl start' to run" 128fi 129