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 #
10 basedir=`dirname $0`
11 source ${basedir}/functions.sh
12 root_check_run_with_sudo "$@"
13 #
14 # Required param: -i dev in $DEV
15 source ${basedir}/parameters.sh
16
17 # Trap EXIT first
18 trap_exit
19
20 [ -z "$COUNT" ] && COUNT="100000" # Zero means indefinitely
21
22 # Base Config
23 [ -z "$CLONE_SKB" ] && CLONE_SKB="0"
24
25 # Flow variation random source port between min and max
26 UDP_SRC_MIN=9
27 UDP_SRC_MAX=109
28
29 # (example of setting default params in your script)
30 if [ -z "$DEST_IP" ]; then
31 [ -z "$IP6" ] && DEST_IP="198.18.0.42" || DEST_IP="FD00::1"
32 fi
33 [ -z "$DST_MAC" ] && DST_MAC="90:e2:ba:ff:ff:ff"
34 if [ -n "$DEST_IP" ]; then
35 validate_addr${IP6} $DEST_IP
36 read -r DST_MIN DST_MAX <<< $(parse_addr${IP6} $DEST_IP)
37 fi
38 if [ -n "$DST_PORT" ]; then
39 read -r UDP_DST_MIN UDP_DST_MAX <<< $(parse_ports $DST_PORT)
40 validate_ports $UDP_DST_MIN $UDP_DST_MAX
41 fi
42
43 # General cleanup everything since last run
44 [ -z "$APPEND" ] && pg_ctrl "reset"
45
46 # Threads are specified with parameter -t value in $THREADS
47 for ((thread = $F_THREAD; thread <= $L_THREAD; thread++)); do
48 # The device name is extended with @name, using thread number to
49 # make then unique, but any name will do.
50 dev=${DEV}@${thread}
51
52 # Add remove all other devices and add_device $dev to thread
53 [ -z "$APPEND" ] && pg_thread $thread "rem_device_all"
54 pg_thread $thread "add_device" $dev
55
56 # Notice config queue to map to cpu (mirrors smp_processor_id())
57 # It is beneficial to map IRQ /proc/irq/*/smp_affinity 1:1 to CPU number
58 pg_set $dev "flag QUEUE_MAP_CPU"
59
60 # Base config of dev
61 pg_set $dev "count $COUNT"
62 pg_set $dev "clone_skb $CLONE_SKB"
63 pg_set $dev "pkt_size $PKT_SIZE"
64 pg_set $dev "delay $DELAY"
65
66 # Flag example disabling timestamping
67 pg_set $dev "flag NO_TIMESTAMP"
68
69 # Destination
70 pg_set $dev "dst_mac $DST_MAC"
71 pg_set $dev "dst${IP6}_min $DST_MIN"
72 pg_set $dev "dst${IP6}_max $DST_MAX"
73
74 if [ -n "$DST_PORT" ]; then
75 # Single destination port or random port range
76 pg_set $dev "flag UDPDST_RND"
77 pg_set $dev "udp_dst_min $UDP_DST_MIN"
78 pg_set $dev "udp_dst_max $UDP_DST_MAX"
79 fi
80
81 [ ! -z "$UDP_CSUM" ] && pg_set $dev "flag UDPCSUM"
82
83 # Setup random UDP port src range
84 pg_set $dev "flag UDPSRC_RND"
85 pg_set $dev "udp_src_min $UDP_SRC_MIN"
86 pg_set $dev "udp_src_max $UDP_SRC_MAX"
87 done
88
89 # Run if user hits control-c
90 function print_result() {
91 # Print results
92 for ((thread = $F_THREAD; thread <= $L_THREAD; thread++)); do
93 dev=${DEV}@${thread}
94 echo "Device: $dev"
95 cat /proc/net/pktgen/$dev | grep -A2 "Result:"
96 done
97 }
98 # trap keyboard interrupt (Ctrl-C)
99 trap true SIGINT
100
101 if [ -z "$APPEND" ]; then
102 # start_run
103 echo "Running... ctrl^C to stop" >&2
104 pg_ctrl "start"
105 echo "Done" >&2
106
107 print_result
108 else
109 echo "Append mode: config done. Do more or use 'pg_ctrl start' to run"
110 fi
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