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
11 source ${basedir}/functions.sh
12 root_check_run_with_sudo "$@"
14 # Required param: -i dev in $DEV
15 source ${basedir}/parameters.sh
18 [ -z "$COUNT" ] && COUNT="20000000" # Zero means indefinitely
19 [ -z "$CLONE_SKB" ] && CLONE_SKB="0"
21 # Flow variation random source port between min and max
25 node=`get_iface_node $DEV`
26 irq_array=(`get_iface_irqs $DEV`)
27 cpu_array=(`get_node_cpus $node`)
29 [ $THREADS -gt ${#irq_array[*]} -o $THREADS -gt ${#cpu_array[*]} ] && \
30 err 1 "Thread number $THREADS exceeds: min (${#irq_array[*]},${#cpu_array[*]})"
32 # (example of setting default params in your script)
33 if [ -z "$DEST_IP" ]; then
34 [ -z "$IP6" ] && DEST_IP="198.18.0.42" || DEST_IP="FD00::1"
36 [ -z "$DST_MAC" ] && DST_MAC="90:e2:ba:ff:ff:ff"
37 if [ -n "$DEST_IP" ]; then
38 validate_addr${IP6} $DEST_IP
39 read -r DST_MIN DST_MAX <<< $(parse_addr${IP6} $DEST_IP)
41 if [ -n "$DST_PORT" ]; then
42 read -r UDP_DST_MIN UDP_DST_MAX <<< $(parse_ports $DST_PORT)
43 validate_ports $UDP_DST_MIN $UDP_DST_MAX
46 # General cleanup everything since last run
47 [ -z "$APPEND" ] && pg_ctrl "reset"
49 # Threads are specified with parameter -t value in $THREADS
50 for ((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))]}
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`"
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
64 # select queue and bind the queue and $dev in 1:1 relationship
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"
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"
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"
80 # Flag example disabling timestamping
81 pg_set $dev "flag NO_TIMESTAMP"
84 pg_set $dev "dst_mac $DST_MAC"
85 pg_set $dev "dst${IP6}_min $DST_MIN"
86 pg_set $dev "dst${IP6}_max $DST_MAX"
88 if [ -n "$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 $UDP_DST_MAX"
95 [ ! -z "$UDP_CSUM" ] && pg_set $dev "flag UDPCSUM"
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"
103 # Run if user hits control-c
104 function print_result() {
106 for ((i = 0; i < $THREADS; i++)); do
107 thread=${cpu_array[$((i+F_THREAD))]}
110 cat /proc/net/pktgen/$dev | grep -A2 "Result:"
113 # trap keyboard interrupt (Ctrl-C)
117 if [ -z "$APPEND" ]; then
118 echo "Running... ctrl^C to stop" >&2
124 echo "Append mode: config done. Do more or use 'pg_ctrl start' to run"