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