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 #
13 basedir=`dirname $0`
14 source ${basedir}/functions.sh
15 root_check_run_with_sudo "$@"
16
17 # Parameter parsing via include
18 source ${basedir}/parameters.sh
19
20 # Trap EXIT first
21 trap_exit
22
23 # Set some default params, if they didn't get set
24 if [ -z "$DEST_IP" ]; then
25 [ -z "$IP6" ] && DEST_IP="198.18.0.42" || DEST_IP="FD00::1"
26 fi
27 [ -z "$DST_MAC" ] && DST_MAC="90:e2:ba:ff:ff:ff"
28 [ -z "$CLONE_SKB" ] && CLONE_SKB="0"
29 [ -z "$BURST" ] && BURST=32
30 [ -z "$COUNT" ] && COUNT="0" # Zero means indefinitely
31 if [ -n "$DEST_IP" ]; then
32 validate_addr${IP6} $DEST_IP
33 read -r DST_MIN DST_MAX <<< $(parse_addr${IP6} $DEST_IP)
34 fi
35 if [ -n "$DST_PORT" ]; then
36 read -r UDP_DST_MIN UDP_DST_MAX <<< $(parse_ports $DST_PORT)
37 validate_ports $UDP_DST_MIN $UDP_DST_MAX
38 fi
39
40 # General cleanup everything since last run
41 [ -z "$APPEND" ] && pg_ctrl "reset"
42
43 # Threads are specified with parameter -t value in $THREADS
44 for ((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
85 done
86
87 # Run if user hits control-c
88 function 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)
97 trap true SIGINT
98
99 if [ -z "$APPEND" ]; then
100 echo "Running... ctrl^C to stop" >&2
101 pg_ctrl "start"
102
103 print_result
104 else
105 echo "Append mode: config done. Do more or use 'pg_ctrl start' to run"
106 fi
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