1#!/bin/bash
2#
3# Multiqueue: Using pktgen threads for sending on multiple CPUs
4#  * adding devices to kernel threads
5#  * notice the naming scheme for keeping device names unique
6#  * nameing scheme: dev@thread_number
7#  * flow variation via random UDP source port
8#
9basedir=`dirname $0`
10source ${basedir}/functions.sh
11root_check_run_with_sudo "$@"
12#
13# Required param: -i dev in $DEV
14source ${basedir}/parameters.sh
15
16# Base Config
17DELAY="0"        # Zero means max speed
18COUNT="100000"   # Zero means indefinitely
19[ -z "$CLONE_SKB" ] && CLONE_SKB="0"
20
21# Flow variation random source port between min and max
22UDP_MIN=9
23UDP_MAX=109
24
25# (example of setting default params in your script)
26if [ -z "$DEST_IP" ]; then
27    [ -z "$IP6" ] && DEST_IP="198.18.0.42" || DEST_IP="FD00::1"
28fi
29[ -z "$DST_MAC" ] && DST_MAC="90:e2:ba:ff:ff:ff"
30
31# General cleanup everything since last run
32pg_ctrl "reset"
33
34# Threads are specified with parameter -t value in $THREADS
35for ((thread = 0; thread < $THREADS; thread++)); do
36    # The device name is extended with @name, using thread number to
37    # make then unique, but any name will do.
38    dev=${DEV}@${thread}
39
40    # Add remove all other devices and add_device $dev to thread
41    pg_thread $thread "rem_device_all"
42    pg_thread $thread "add_device" $dev
43
44    # Notice config queue to map to cpu (mirrors smp_processor_id())
45    # It is beneficial to map IRQ /proc/irq/*/smp_affinity 1:1 to CPU number
46    pg_set $dev "flag QUEUE_MAP_CPU"
47
48    # Base config of dev
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
54    # Flag example disabling timestamping
55    pg_set $dev "flag NO_TIMESTAMP"
56
57    # Destination
58    pg_set $dev "dst_mac $DST_MAC"
59    pg_set $dev "dst$IP6 $DEST_IP"
60
61    # Setup random UDP port src range
62    pg_set $dev "flag UDPSRC_RND"
63    pg_set $dev "udp_src_min $UDP_MIN"
64    pg_set $dev "udp_src_max $UDP_MAX"
65done
66
67# start_run
68echo "Running... ctrl^C to stop" >&2
69pg_ctrl "start"
70echo "Done" >&2
71
72# Print results
73for ((thread = 0; thread < $THREADS; thread++)); do
74    dev=${DEV}@${thread}
75    echo "Device: $dev"
76    cat /proc/net/pktgen/$dev | grep -A2 "Result:"
77done
78