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
20DELAY="0"        # Zero means max speed
21[ -z "$CLONE_SKB" ] && CLONE_SKB="0"
22
23# Flow variation random source port between min and max
24UDP_MIN=9
25UDP_MAX=109
26
27# (example of setting default params in your script)
28if [ -z "$DEST_IP" ]; then
29    [ -z "$IP6" ] && DEST_IP="198.18.0.42" || DEST_IP="FD00::1"
30fi
31[ -z "$DST_MAC" ] && DST_MAC="90:e2:ba:ff:ff:ff"
32
33# General cleanup everything since last run
34pg_ctrl "reset"
35
36# Threads are specified with parameter -t value in $THREADS
37for ((thread = $F_THREAD; thread <= $L_THREAD; thread++)); do
38    # The device name is extended with @name, using thread number to
39    # make then unique, but any name will do.
40    dev=${DEV}@${thread}
41
42    # Add remove all other devices and add_device $dev to thread
43    pg_thread $thread "rem_device_all"
44    pg_thread $thread "add_device" $dev
45
46    # Notice config queue to map to cpu (mirrors smp_processor_id())
47    # It is beneficial to map IRQ /proc/irq/*/smp_affinity 1:1 to CPU number
48    pg_set $dev "flag QUEUE_MAP_CPU"
49
50    # Base config of dev
51    pg_set $dev "count $COUNT"
52    pg_set $dev "clone_skb $CLONE_SKB"
53    pg_set $dev "pkt_size $PKT_SIZE"
54    pg_set $dev "delay $DELAY"
55
56    # Flag example disabling timestamping
57    pg_set $dev "flag NO_TIMESTAMP"
58
59    # Destination
60    pg_set $dev "dst_mac $DST_MAC"
61    pg_set $dev "dst$IP6 $DEST_IP"
62
63    # Setup random UDP port src range
64    pg_set $dev "flag UDPSRC_RND"
65    pg_set $dev "udp_src_min $UDP_MIN"
66    pg_set $dev "udp_src_max $UDP_MAX"
67done
68
69# start_run
70echo "Running... ctrl^C to stop" >&2
71pg_ctrl "start"
72echo "Done" >&2
73
74# Print results
75for ((thread = $F_THREAD; thread <= $L_THREAD; thread++)); do
76    dev=${DEV}@${thread}
77    echo "Device: $dev"
78    cat /proc/net/pktgen/$dev | grep -A2 "Result:"
79done
80