pktgen_sample02_multiqueue.sh

  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 ${basedir}/parameters.sh
 16
 17# Trap EXIT first
 18trap_exit
 19
 20[ -z "$COUNT" ] && COUNT="100000" # Zero means indefinitely
 21
 22# Base Config
 23[ -z "$CLONE_SKB" ] && CLONE_SKB="0"
 24
 25# Flow variation random source port between min and max
 26UDP_SRC_MIN=9
 27UDP_SRC_MAX=109
 28
 29# (example of setting default params in your script)
 30if [ -z "$DEST_IP" ]; then
 31    [ -z "$IP6" ] && DEST_IP="198.18.0.42" || DEST_IP="FD00::1"
 32fi
 33[ -z "$DST_MAC" ] && DST_MAC="90:e2:ba:ff:ff:ff"
 34if [ -n "$DEST_IP" ]; then
 35    validate_addr${IP6} $DEST_IP
 36    read -r DST_MIN DST_MAX <<< $(parse_addr${IP6} $DEST_IP)
 37fi
 38if [ -n "$DST_PORT" ]; then
 39    read -r UDP_DST_MIN UDP_DST_MAX <<< $(parse_ports $DST_PORT)
 40    validate_ports $UDP_DST_MIN $UDP_DST_MAX
 41fi
 42
 43# General cleanup everything since last run
 44[ -z "$APPEND" ] && pg_ctrl "reset"
 45
 46# Threads are specified with parameter -t value in $THREADS
 47for ((thread = $F_THREAD; thread <= $L_THREAD; thread++)); do
 48    # The device name is extended with @name, using thread number to
 49    # make then unique, but any name will do.
 50    dev=${DEV}@${thread}
 51
 52    # Add remove all other devices and add_device $dev to thread
 53    [ -z "$APPEND" ] && pg_thread $thread "rem_device_all"
 54    pg_thread $thread "add_device" $dev
 55
 56    # Notice config queue to map to cpu (mirrors smp_processor_id())
 57    # It is beneficial to map IRQ /proc/irq/*/smp_affinity 1:1 to CPU number
 58    pg_set $dev "flag QUEUE_MAP_CPU"
 59
 60    # Base config of dev
 61    pg_set $dev "count $COUNT"
 62    pg_set $dev "clone_skb $CLONE_SKB"
 63    pg_set $dev "pkt_size $PKT_SIZE"
 64    pg_set $dev "delay $DELAY"
 65
 66    # Flag example disabling timestamping
 67    pg_set $dev "flag NO_TIMESTAMP"
 68
 69    # Destination
 70    pg_set $dev "dst_mac $DST_MAC"
 71    pg_set $dev "dst${IP6}_min $DST_MIN"
 72    pg_set $dev "dst${IP6}_max $DST_MAX"
 73
 74    if [ -n "$DST_PORT" ]; then
 75	# Single destination port or random port range
 76	pg_set $dev "flag UDPDST_RND"
 77	pg_set $dev "udp_dst_min $UDP_DST_MIN"
 78	pg_set $dev "udp_dst_max $UDP_DST_MAX"
 79    fi
 80
 81    [ ! -z "$UDP_CSUM" ] && pg_set $dev "flag UDPCSUM"
 82
 83    # Setup random UDP port src range
 84    pg_set $dev "flag UDPSRC_RND"
 85    pg_set $dev "udp_src_min $UDP_SRC_MIN"
 86    pg_set $dev "udp_src_max $UDP_SRC_MAX"
 87done
 88
 89# Run if user hits control-c
 90function print_result() {
 91    # Print results
 92    for ((thread = $F_THREAD; thread <= $L_THREAD; thread++)); do
 93        dev=${DEV}@${thread}
 94        echo "Device: $dev"
 95        cat /proc/net/pktgen/$dev | grep -A2 "Result:"
 96    done
 97}
 98# trap keyboard interrupt (Ctrl-C)
 99trap true SIGINT
100
101if [ -z "$APPEND" ]; then
102    # start_run
103    echo "Running... ctrl^C to stop" >&2
104    pg_ctrl "start"
105    echo "Done" >&2
106
107    print_result
108else
109    echo "Append mode: config done. Do more or use 'pg_ctrl start' to run"
110fi