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 ${basedir}/parameters.sh
19# Set some default params, if they didn't get set
20if [ -z "$DEST_IP" ]; then
21    [ -z "$IP6" ] && DEST_IP="198.18.0.42" || DEST_IP="FD00::1"
22fi
23[ -z "$DST_MAC" ]   && DST_MAC="90:e2:ba:ff:ff:ff"
24[ -z "$CLONE_SKB" ] && CLONE_SKB="0"
25[ -z "$BURST" ]     && BURST=32
26[ -z "$COUNT" ]     && COUNT="0" # Zero means indefinitely
27if [ -n "$DEST_IP" ]; then
28    validate_addr${IP6} $DEST_IP
29    read -r DST_MIN DST_MAX <<< $(parse_addr${IP6} $DEST_IP)
30fi
31if [ -n "$DST_PORT" ]; then
32    read -r UDP_DST_MIN UDP_DST_MAX <<< $(parse_ports $DST_PORT)
33    validate_ports $UDP_DST_MIN $UDP_DST_MAX
34fi
35
36# General cleanup everything since last run
37[ -z "$APPEND" ] && pg_ctrl "reset"
38
39# Threads are specified with parameter -t value in $THREADS
40for ((thread = $F_THREAD; thread <= $L_THREAD; thread++)); do
41    dev=${DEV}@${thread}
42
43    # Add remove all other devices and add_device $dev to thread
44    [ -z "$APPEND" ] && pg_thread $thread "rem_device_all"
45    pg_thread $thread "add_device" $dev
46
47    # Base config
48    pg_set $dev "flag QUEUE_MAP_CPU"
49    pg_set $dev "count $COUNT"
50    pg_set $dev "clone_skb $CLONE_SKB"
51    pg_set $dev "pkt_size $PKT_SIZE"
52    pg_set $dev "delay $DELAY"
53    pg_set $dev "flag NO_TIMESTAMP"
54
55    # Single destination
56    pg_set $dev "dst_mac $DST_MAC"
57    pg_set $dev "dst${IP6}_min $DST_MIN"
58    pg_set $dev "dst${IP6}_max $DST_MAX"
59
60    if [ -n "$DST_PORT" ]; then
61	# Single destination port or random port range
62	pg_set $dev "flag UDPDST_RND"
63	pg_set $dev "udp_dst_min $UDP_DST_MIN"
64	pg_set $dev "udp_dst_max $UDP_DST_MAX"
65    fi
66
67    [ ! -z "$UDP_CSUM" ] && pg_set $dev "flag UDPCSUM"
68
69    # Setup source IP-addresses based on thread number
70    pg_set $dev "src_min 198.18.$((thread+1)).1"
71    pg_set $dev "src_max 198.18.$((thread+1)).1"
72
73    # Setup burst, for easy testing -b 0 disable bursting
74    # (internally in pktgen default and minimum burst=1)
75    if [[ ${BURST} -ne 0 ]]; then
76	pg_set $dev "burst $BURST"
77    else
78	info "$dev: Not using burst"
79    fi
80
81done
82
83# Run if user hits control-c
84function print_result() {
85    # Print results
86    for ((thread = $F_THREAD; thread <= $L_THREAD; thread++)); do
87	dev=${DEV}@${thread}
88	echo "Device: $dev"
89	cat /proc/net/pktgen/$dev | grep -A2 "Result:"
90    done
91}
92# trap keyboard interrupt (Ctrl-C)
93trap true SIGINT
94
95if [ -z "$APPEND" ]; then
96    echo "Running... ctrl^C to stop" >&2
97    pg_ctrl "start"
98
99    print_result
100else
101    echo "Append mode: config done. Do more or use 'pg_ctrl start' to run"
102fi
103