1#!/bin/bash
2# SPDX-License-Identifier: GPL-2.0
3#
4# Script will generate one flow per thread (-t N)
5#  - Same destination IP
6#  - Fake source IPs for each flow (fixed based on thread number)
7#
8# Useful for scale testing on receiver, to see whether silo'ing flows
9# works and scales.  For optimal scalability (on receiver) each
10# separate-flow should not access shared variables/data. This script
11# helps magnify any of these scaling issues by overloading the receiver.
12#
13basedir=`dirname $0`
14source ${basedir}/functions.sh
15root_check_run_with_sudo "$@"
16
17# Parameter parsing via include
18source ${basedir}/parameters.sh
19# Set some default params, if they didn't get set
20[ -z "$DEST_IP" ]   && DEST_IP="198.18.0.42"
21[ -z "$DST_MAC" ]   && DST_MAC="90:e2:ba:ff:ff:ff"
22[ -z "$CLONE_SKB" ] && CLONE_SKB="0"
23[ -z "$BURST" ]     && BURST=32
24[ -z "$COUNT" ]     && COUNT="0" # Zero means indefinitely
25if [ -n "$DEST_IP" ]; then
26    validate_addr $DEST_IP
27    read -r DST_MIN DST_MAX <<< $(parse_addr $DEST_IP)
28fi
29if [ -n "$DST_PORT" ]; then
30    read -r UDP_DST_MIN UDP_DST_MAX <<< $(parse_ports $DST_PORT)
31    validate_ports $UDP_DST_MIN $UDP_DST_MAX
32fi
33
34# General cleanup everything since last run
35[ -z "$APPEND" ] && pg_ctrl "reset"
36
37# Threads are specified with parameter -t value in $THREADS
38for ((thread = $F_THREAD; thread <= $L_THREAD; thread++)); do
39    dev=${DEV}@${thread}
40
41    # Add remove all other devices and add_device $dev to thread
42    [ -z "$APPEND" ] && pg_thread $thread "rem_device_all"
43    pg_thread $thread "add_device" $dev
44
45    # Base config
46    pg_set $dev "flag QUEUE_MAP_CPU"
47    pg_set $dev "count $COUNT"
48    pg_set $dev "clone_skb $CLONE_SKB"
49    pg_set $dev "pkt_size $PKT_SIZE"
50    pg_set $dev "delay $DELAY"
51    pg_set $dev "flag NO_TIMESTAMP"
52
53    # Single destination
54    pg_set $dev "dst_mac $DST_MAC"
55    pg_set $dev "dst_min $DST_MIN"
56    pg_set $dev "dst_max $DST_MAX"
57
58    if [ -n "$DST_PORT" ]; then
59	# Single destination port or random port range
60	pg_set $dev "flag UDPDST_RND"
61	pg_set $dev "udp_dst_min $UDP_DST_MIN"
62	pg_set $dev "udp_dst_max $UDP_DST_MAX"
63    fi
64
65    [ ! -z "$UDP_CSUM" ] && pg_set $dev "flag UDPCSUM"
66
67    # Setup source IP-addresses based on thread number
68    pg_set $dev "src_min 198.18.$((thread+1)).1"
69    pg_set $dev "src_max 198.18.$((thread+1)).1"
70
71    # Setup burst, for easy testing -b 0 disable bursting
72    # (internally in pktgen default and minimum burst=1)
73    if [[ ${BURST} -ne 0 ]]; then
74	pg_set $dev "burst $BURST"
75    else
76	info "$dev: Not using burst"
77    fi
78
79done
80
81# Run if user hits control-c
82function print_result() {
83    # Print results
84    for ((thread = $F_THREAD; thread <= $L_THREAD; thread++)); do
85	dev=${DEV}@${thread}
86	echo "Device: $dev"
87	cat /proc/net/pktgen/$dev | grep -A2 "Result:"
88    done
89}
90# trap keyboard interrupt (Ctrl-C)
91trap true SIGINT
92
93if [ -z "$APPEND" ]; then
94    echo "Running... ctrl^C to stop" >&2
95    pg_ctrl "start"
96
97    print_result
98else
99    echo "Append mode: config done. Do more or use 'pg_ctrl start' to run"
100fi
101