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 ${basedir}/parameters.sh
16
17# Base Config
18[ -z "$COUNT" ]     && COUNT="20000000"   # Zero means indefinitely
19[ -z "$CLONE_SKB" ] && CLONE_SKB="0"
20
21# Flow variation random source port between min and max
22UDP_SRC_MIN=9
23UDP_SRC_MAX=109
24
25node=`get_iface_node $DEV`
26irq_array=(`get_iface_irqs $DEV`)
27cpu_array=(`get_node_cpus $node`)
28
29[ $THREADS -gt ${#irq_array[*]} -o $THREADS -gt ${#cpu_array[*]}  ] && \
30	err 1 "Thread number $THREADS exceeds: min (${#irq_array[*]},${#cpu_array[*]})"
31
32# (example of setting default params in your script)
33if [ -z "$DEST_IP" ]; then
34    [ -z "$IP6" ] && DEST_IP="198.18.0.42" || DEST_IP="FD00::1"
35fi
36[ -z "$DST_MAC" ] && DST_MAC="90:e2:ba:ff:ff:ff"
37if [ -n "$DEST_IP" ]; then
38    validate_addr${IP6} $DEST_IP
39    read -r DST_MIN DST_MAX <<< $(parse_addr${IP6} $DEST_IP)
40fi
41if [ -n "$DST_PORT" ]; then
42    read -r UDP_DST_MIN UDP_DST_MAX <<< $(parse_ports $DST_PORT)
43    validate_ports $UDP_DST_MIN $UDP_DST_MAX
44fi
45
46# General cleanup everything since last run
47[ -z "$APPEND" ] && pg_ctrl "reset"
48
49# Threads are specified with parameter -t value in $THREADS
50for ((i = 0; i < $THREADS; i++)); do
51    # The device name is extended with @name, using thread number to
52    # make then unique, but any name will do.
53    # Set the queue's irq affinity to this $thread (processor)
54    # if '-f' is designated, offset cpu id
55    thread=${cpu_array[$((i+F_THREAD))]}
56    dev=${DEV}@${thread}
57    echo $thread > /proc/irq/${irq_array[$i]}/smp_affinity_list
58    info "irq ${irq_array[$i]} is set affinity to `cat /proc/irq/${irq_array[$i]}/smp_affinity_list`"
59
60    # Add remove all other devices and add_device $dev to thread
61    [ -z "$APPEND" ] && pg_thread $thread "rem_device_all"
62    pg_thread $thread "add_device" $dev
63
64    # select queue and bind the queue and $dev in 1:1 relationship
65    queue_num=$i
66    info "queue number is $queue_num"
67    pg_set $dev "queue_map_min $queue_num"
68    pg_set $dev "queue_map_max $queue_num"
69
70    # Notice config queue to map to cpu (mirrors smp_processor_id())
71    # It is beneficial to map IRQ /proc/irq/*/smp_affinity 1:1 to CPU number
72    pg_set $dev "flag QUEUE_MAP_CPU"
73
74    # Base config of dev
75    pg_set $dev "count $COUNT"
76    pg_set $dev "clone_skb $CLONE_SKB"
77    pg_set $dev "pkt_size $PKT_SIZE"
78    pg_set $dev "delay $DELAY"
79
80    # Flag example disabling timestamping
81    pg_set $dev "flag NO_TIMESTAMP"
82
83    # Destination
84    pg_set $dev "dst_mac $DST_MAC"
85    pg_set $dev "dst${IP6}_min $DST_MIN"
86    pg_set $dev "dst${IP6}_max $DST_MAX"
87
88    if [ -n "$DST_PORT" ]; then
89	# Single destination port or random port range
90	pg_set $dev "flag UDPDST_RND"
91	pg_set $dev "udp_dst_min $UDP_DST_MIN"
92	pg_set $dev "udp_dst_max $UDP_DST_MAX"
93    fi
94
95    [ ! -z "$UDP_CSUM" ] && pg_set $dev "flag UDPCSUM"
96
97    # Setup random UDP port src range
98    pg_set $dev "flag UDPSRC_RND"
99    pg_set $dev "udp_src_min $UDP_SRC_MIN"
100    pg_set $dev "udp_src_max $UDP_SRC_MAX"
101done
102
103# start_run
104if [ -z "$APPEND" ]; then
105    echo "Running... ctrl^C to stop" >&2
106    pg_ctrl "start"
107    echo "Done" >&2
108
109    # Print results
110    for ((i = 0; i < $THREADS; i++)); do
111        thread=${cpu_array[$((i+F_THREAD))]}
112        dev=${DEV}@${thread}
113        echo "Device: $dev"
114        cat /proc/net/pktgen/$dev | grep -A2 "Result:"
115    done
116else
117    echo "Append mode: config done. Do more or use 'pg_ctrl start' to run"
118fi
119