samples/pktgen/pktgen_bench_xmit_mode_netif_receive.sh

   1 #!/bin/bash
   2 #
   3 # Benchmark script:
   4 #  - developed for benchmarking ingress qdisc path
   5 #
   6 # Script for injecting packets into RX path of the stack with pktgen
   7 # "xmit_mode netif_receive".  With an invalid dst_mac this will only
   8 # measure the ingress code path as packets gets dropped in ip_rcv().
   9 #
  10 # This script don't really need any hardware.  It benchmarks software
  11 # RX path just after NIC driver level.  With bursting is also
  12 # "removes" the SKB alloc/free overhead.
  13 #
  14 # Setup scenarios for measuring ingress qdisc (with invalid dst_mac):
  15 # ------------------------------------------------------------------
  16 # (1) no ingress (uses static_key_false(&ingress_needed))
  17 #
  18 # (2) ingress on other dev (change ingress_needed and calls
  19 #     handle_ing() but exit early)
  20 #
  21 #  config:  tc qdisc add dev $SOMEDEV handle ffff: ingress
  22 #
  23 # (3) ingress on this dev, handle_ing() -> tc_classify()
  24 #
  25 #  config:  tc qdisc add dev $DEV handle ffff: ingress
  26 #
  27 # (4) ingress on this dev + drop at u32 classifier/action.
  28 #
  29 basedir=`dirname $0`
  30 source ${basedir}/functions.sh
  31 root_check_run_with_sudo "$@"
  32
  33 # Parameter parsing via include
  34 source ${basedir}/parameters.sh
  35 # Using invalid DST_MAC will cause the packets to get dropped in
  36 # ip_rcv() which is part of the test
  37 if [ -z "$DEST_IP" ]; then
  38     [ -z "$IP6" ] && DEST_IP="198.18.0.42" || DEST_IP="FD00::1"
  39 fi
  40 [ -z "$DST_MAC" ] && DST_MAC="90:e2:ba:ff:ff:ff"
  41 [ -z "$BURST" ] && BURST=1024
  42
  43 # Base Config
  44 DELAY="0"        # Zero means max speed
  45 COUNT="10000000" # Zero means indefinitely
  46
  47 # General cleanup everything since last run
  48 pg_ctrl "reset"
  49
  50 # Threads are specified with parameter -t value in $THREADS
  51 for ((thread = 0; thread < $THREADS; thread++)); do
  52     # The device name is extended with @name, using thread number to
  53     # make then unique, but any name will do.
  54     dev=${DEV}@${thread}
  55
  56     # Add remove all other devices and add_device $dev to thread
  57     pg_thread $thread "rem_device_all"
  58     pg_thread $thread "add_device" $dev
  59
  60     # Base config of dev
  61     pg_set $dev "flag QUEUE_MAP_CPU"
  62     pg_set $dev "count $COUNT"
  63     pg_set $dev "pkt_size $PKT_SIZE"
  64     pg_set $dev "delay $DELAY"
  65     pg_set $dev "flag NO_TIMESTAMP"
  66
  67     # Destination
  68     pg_set $dev "dst_mac $DST_MAC"
  69     pg_set $dev "dst$IP6 $DEST_IP"
  70
  71     # Inject packet into RX path of stack
  72     pg_set $dev "xmit_mode netif_receive"
  73
  74     # Burst allow us to avoid measuring SKB alloc/free overhead
  75     pg_set $dev "burst $BURST"
  76 done
  77
  78 # start_run
  79 echo "Running... ctrl^C to stop" >&2
  80 pg_ctrl "start"
  81 echo "Done" >&2
  82
  83 # Print results
  84 for ((thread = 0; thread < $THREADS; thread++)); do
  85     dev=${DEV}@${thread}
  86     echo "Device: $dev"
  87     cat /proc/net/pktgen/$dev | grep -A2 "Result:"
  88 done