samples/pktgen/pktgen_sample06_numa_awared_queue_irq_affinity.sh

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