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- #!/bin/bash
- #
- # Multiqueue: Using pktgen threads for sending on multiple CPUs
- # * adding devices to kernel threads which are in the same NUMA node
- # * bound devices queue's irq affinity to the threads, 1:1 mapping
- # * notice the naming scheme for keeping device names unique
- # * nameing scheme: dev@thread_number
- # * flow variation via random UDP source port
- #
- basedir=`dirname $0`
- source ${basedir}/functions.sh
- root_check_run_with_sudo "$@"
- #
- # Required param: -i dev in $DEV
- source ${basedir}/parameters.sh
- # Base Config
- DELAY="0" # Zero means max speed
- [ -z "$COUNT" ] && COUNT="20000000" # Zero means indefinitely
- [ -z "$CLONE_SKB" ] && CLONE_SKB="0"
- # Flow variation random source port between min and max
- UDP_SRC_MIN=9
- UDP_SRC_MAX=109
- node=`get_iface_node $DEV`
- irq_array=(`get_iface_irqs $DEV`)
- cpu_array=(`get_node_cpus $node`)
- [ $THREADS -gt ${#irq_array[*]} -o $THREADS -gt ${#cpu_array[*]} ] && \
- err 1 "Thread number $THREADS exceeds: min (${#irq_array[*]},${#cpu_array[*]})"
- # (example of setting default params in your script)
- if [ -z "$DEST_IP" ]; then
- [ -z "$IP6" ] && DEST_IP="198.18.0.42" || DEST_IP="FD00::1"
- fi
- [ -z "$DST_MAC" ] && DST_MAC="90:e2:ba:ff:ff:ff"
- if [ -n "$DEST_IP" ]; then
- validate_addr${IP6} $DEST_IP
- read -r DST_MIN DST_MAX <<< $(parse_addr${IP6} $DEST_IP)
- fi
- if [ -n "$DST_PORT" ]; then
- read -r UDP_DST_MIN UDP_DST_MAX <<< $(parse_ports $DST_PORT)
- validate_ports $UDP_DST_MIN $UDP_DST_MAX
- fi
- # General cleanup everything since last run
- pg_ctrl "reset"
- # Threads are specified with parameter -t value in $THREADS
- for ((i = 0; i < $THREADS; i++)); do
- # The device name is extended with @name, using thread number to
- # make then unique, but any name will do.
- # Set the queue's irq affinity to this $thread (processor)
- # if '-f' is designated, offset cpu id
- thread=${cpu_array[$((i+F_THREAD))]}
- dev=${DEV}@${thread}
- echo $thread > /proc/irq/${irq_array[$i]}/smp_affinity_list
- info "irq ${irq_array[$i]} is set affinity to `cat /proc/irq/${irq_array[$i]}/smp_affinity_list`"
- # Add remove all other devices and add_device $dev to thread
- pg_thread $thread "rem_device_all"
- pg_thread $thread "add_device" $dev
- # select queue and bind the queue and $dev in 1:1 relationship
- queue_num=$i
- info "queue number is $queue_num"
- pg_set $dev "queue_map_min $queue_num"
- pg_set $dev "queue_map_max $queue_num"
- # Notice config queue to map to cpu (mirrors smp_processor_id())
- # It is beneficial to map IRQ /proc/irq/*/smp_affinity 1:1 to CPU number
- pg_set $dev "flag QUEUE_MAP_CPU"
- # Base config of dev
- pg_set $dev "count $COUNT"
- pg_set $dev "clone_skb $CLONE_SKB"
- pg_set $dev "pkt_size $PKT_SIZE"
- pg_set $dev "delay $DELAY"
- # Flag example disabling timestamping
- pg_set $dev "flag NO_TIMESTAMP"
- # Destination
- pg_set $dev "dst_mac $DST_MAC"
- pg_set $dev "dst${IP6}_min $DST_MIN"
- pg_set $dev "dst${IP6}_max $DST_MAX"
- if [ -n "$DST_PORT" ]; then
- # Single destination port or random port range
- pg_set $dev "flag UDPDST_RND"
- pg_set $dev "udp_dst_min $UDP_DST_MIN"
- pg_set $dev "udp_dst_max $UDP_DST_MAX"
- fi
- # Setup random UDP port src range
- pg_set $dev "flag UDPSRC_RND"
- pg_set $dev "udp_src_min $UDP_SRC_MIN"
- pg_set $dev "udp_src_max $UDP_SRC_MAX"
- done
- # start_run
- echo "Running... ctrl^C to stop" >&2
- pg_ctrl "start"
- echo "Done" >&2
- # Print results
- for ((i = 0; i < $THREADS; i++)); do
- thread=${cpu_array[$((i+F_THREAD))]}
- dev=${DEV}@${thread}
- echo "Device: $dev"
- cat /proc/net/pktgen/$dev | grep -A2 "Result:"
- done
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