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 ${basedir}/parameters.sh
19
20# Trap EXIT first
21trap_exit
22
23# Set some default params, if they didn't get set
24if [ -z "$DEST_IP" ]; then
25    [ -z "$IP6" ] && DEST_IP="198.18.0.42" || DEST_IP="FD00::1"
26fi
27[ -z "$DST_MAC" ]   && DST_MAC="90:e2:ba:ff:ff:ff"
28[ -z "$CLONE_SKB" ] && CLONE_SKB="0"
29[ -z "$BURST" ]     && BURST=32
30[ -z "$COUNT" ]     && COUNT="0" # Zero means indefinitely
31if [ -n "$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 <= $L_THREAD; thread++)); do
45    dev=${DEV}@${thread}
46
47    # Add remove all other devices and add_device $dev to thread
48    [ -z "$APPEND" ] && pg_thread $thread "rem_device_all"
49    pg_thread $thread "add_device" $dev
50
51    # Base config
52    pg_set $dev "flag QUEUE_MAP_CPU"
53    pg_set $dev "count $COUNT"
54    pg_set $dev "clone_skb $CLONE_SKB"
55    pg_set $dev "pkt_size $PKT_SIZE"
56    pg_set $dev "delay $DELAY"
57    pg_set $dev "flag NO_TIMESTAMP"
58
59    # Single destination
60    pg_set $dev "dst_mac $DST_MAC"
61    pg_set $dev "dst${IP6}_min $DST_MIN"
62    pg_set $dev "dst${IP6}_max $DST_MAX"
63
64    if [ -n "$DST_PORT" ]; then
65	# Single destination port or random port range
66	pg_set $dev "flag UDPDST_RND"
67	pg_set $dev "udp_dst_min $UDP_DST_MIN"
68	pg_set $dev "udp_dst_max $UDP_DST_MAX"
69    fi
70
71    [ ! -z "$UDP_CSUM" ] && pg_set $dev "flag UDPCSUM"
72
73    # Setup source IP-addresses based on thread number
74    pg_set $dev "src_min 198.18.$((thread+1)).1"
75    pg_set $dev "src_max 198.18.$((thread+1)).1"
76
77    # Setup burst, for easy testing -b 0 disable bursting
78    # (internally in pktgen default and minimum burst=1)
79    if [[ ${BURST} -ne 0 ]]; then
80	pg_set $dev "burst $BURST"
81    else
82	info "$dev: Not using burst"
83    fi
84
85done
86
87# Run if user hits control-c
88function print_result() {
89    # Print results
90    for ((thread = $F_THREAD; thread <= $L_THREAD; thread++)); do
91	dev=${DEV}@${thread}
92	echo "Device: $dev"
93	cat /proc/net/pktgen/$dev | grep -A2 "Result:"
94    done
95}
96# trap keyboard interrupt (Ctrl-C)
97trap true SIGINT
98
99if [ -z "$APPEND" ]; then
100    echo "Running... ctrl^C to stop" >&2
101    pg_ctrl "start"
102
103    print_result
104else
105    echo "Append mode: config done. Do more or use 'pg_ctrl start' to run"
106fi
107