1#!/bin/bash
2#
3# Multiqueue: Using pktgen threads for sending on multiple CPUs
4#  * adding devices to kernel threads which are in the same NUMA node
5#  * bound devices queue's irq affinity to the threads, 1:1 mapping
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#
10basedir=`dirname $0`
11source ${basedir}/functions.sh
12root_check_run_with_sudo "$@"
13#
14# Required param: -i dev in $DEV
15source ${basedir}/parameters.sh
16
17# Base Config
18DELAY="0"        # Zero means max speed
19[ -z "$COUNT" ]     && COUNT="20000000"   # Zero means indefinitely
20[ -z "$CLONE_SKB" ] && CLONE_SKB="0"
21
22# Flow variation random source port between min and max
23UDP_SRC_MIN=9
24UDP_SRC_MAX=109
25
26node=`get_iface_node $DEV`
27irq_array=(`get_iface_irqs $DEV`)
28cpu_array=(`get_node_cpus $node`)
29
30[ $THREADS -gt ${#irq_array[*]} -o $THREADS -gt ${#cpu_array[*]}  ] && \
31	err 1 "Thread number $THREADS exceeds: min (${#irq_array[*]},${#cpu_array[*]})"
32
33# (example of setting default params in your script)
34if [ -z "$DEST_IP" ]; then
35    [ -z "$IP6" ] && DEST_IP="198.18.0.42" || DEST_IP="FD00::1"
36fi
37[ -z "$DST_MAC" ] && DST_MAC="90:e2:ba:ff:ff:ff"
38if [ -n "$DEST_IP" ]; then
39    validate_addr${IP6} $DEST_IP
40    read -r DST_MIN DST_MAX <<< $(parse_addr${IP6} $DEST_IP)
41fi
42if [ -n "$DST_PORT" ]; then
43    read -r UDP_DST_MIN UDP_DST_MAX <<< $(parse_ports $DST_PORT)
44    validate_ports $UDP_DST_MIN $UDP_DST_MAX
45fi
46
47# General cleanup everything since last run
48pg_ctrl "reset"
49
50# Threads are specified with parameter -t value in $THREADS
51for ((i = 0; i < $THREADS; i++)); do
52    # The device name is extended with @name, using thread number to
53    # make then unique, but any name will do.
54    # Set the queue's irq affinity to this $thread (processor)
55    # if '-f' is designated, offset cpu id
56    thread=${cpu_array[$((i+F_THREAD))]}
57    dev=${DEV}@${thread}
58    echo $thread > /proc/irq/${irq_array[$i]}/smp_affinity_list
59    info "irq ${irq_array[$i]} is set affinity to `cat /proc/irq/${irq_array[$i]}/smp_affinity_list`"
60
61    # Add remove all other devices and add_device $dev to thread
62    pg_thread $thread "rem_device_all"
63    pg_thread $thread "add_device" $dev
64
65    # select queue and bind the queue and $dev in 1:1 relationship
66    queue_num=$i
67    info "queue number is $queue_num"
68    pg_set $dev "queue_map_min $queue_num"
69    pg_set $dev "queue_map_max $queue_num"
70
71    # Notice config queue to map to cpu (mirrors smp_processor_id())
72    # It is beneficial to map IRQ /proc/irq/*/smp_affinity 1:1 to CPU number
73    pg_set $dev "flag QUEUE_MAP_CPU"
74
75    # Base config of dev
76    pg_set $dev "count $COUNT"
77    pg_set $dev "clone_skb $CLONE_SKB"
78    pg_set $dev "pkt_size $PKT_SIZE"
79    pg_set $dev "delay $DELAY"
80
81    # Flag example disabling timestamping
82    pg_set $dev "flag NO_TIMESTAMP"
83
84    # Destination
85    pg_set $dev "dst_mac $DST_MAC"
86    pg_set $dev "dst${IP6}_min $DST_MIN"
87    pg_set $dev "dst${IP6}_max $DST_MAX"
88
89    if [ -n "$DST_PORT" ]; then
90	# Single destination port or random port range
91	pg_set $dev "flag UDPDST_RND"
92	pg_set $dev "udp_dst_min $UDP_DST_MIN"
93	pg_set $dev "udp_dst_max $UDP_DST_MAX"
94    fi
95
96    # Setup random UDP port src range
97    pg_set $dev "flag UDPSRC_RND"
98    pg_set $dev "udp_src_min $UDP_SRC_MIN"
99    pg_set $dev "udp_src_max $UDP_SRC_MAX"
100done
101
102# start_run
103echo "Running... ctrl^C to stop" >&2
104pg_ctrl "start"
105echo "Done" >&2
106
107# Print results
108for ((i = 0; i < $THREADS; i++)); do
109    thread=${cpu_array[$((i+F_THREAD))]}
110    dev=${DEV}@${thread}
111    echo "Device: $dev"
112    cat /proc/net/pktgen/$dev | grep -A2 "Result:"
113done
114