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 ${basedir}/parameters.sh
  35 # Using invalid DST_MAC will cause the packets to get dropped in
  36 # ip_rcv() which is part of the test
  37 [ -z "$DEST_IP" ] && DEST_IP="198.18.0.42"
  38 [ -z "$DST_MAC" ] && DST_MAC="90:e2:ba:ff:ff:ff"
  39 [ -z "$BURST" ] && BURST=1024
  40
  41 # Base Config
  42 DELAY="0"        # Zero means max speed
  43 COUNT="10000000" # Zero means indefinitely
  44
  45 # General cleanup everything since last run
  46 pg_ctrl "reset"
  47
  48 # Threads are specified with parameter -t value in $THREADS
  49 for ((thread = 0; thread < $THREADS; thread++)); do
  50     # The device name is extended with @name, using thread number to
  51     # make then unique, but any name will do.
  52     dev=${DEV}@${thread}
  53
  54     # Add remove all other devices and add_device $dev to thread
  55     pg_thread $thread "rem_device_all"
  56     pg_thread $thread "add_device" $dev
  57
  58     # Base config of dev
  59     pg_set $dev "flag QUEUE_MAP_CPU"
  60     pg_set $dev "count $COUNT"
  61     pg_set $dev "pkt_size $PKT_SIZE"
  62     pg_set $dev "delay $DELAY"
  63     pg_set $dev "flag NO_TIMESTAMP"
  64
  65     # Destination
  66     pg_set $dev "dst_mac $DST_MAC"
  67     pg_set $dev "dst $DEST_IP"
  68
  69     # Inject packet into RX path of stack
  70     pg_set $dev "xmit_mode netif_receive"
  71
  72     # Burst allow us to avoid measuring SKB alloc/free overhead
  73     pg_set $dev "burst $BURST"
  74 done
  75
  76 # start_run
  77 echo "Running... ctrl^C to stop" >&2
  78 pg_ctrl "start"
  79 echo "Done" >&2
  80
  81 # Print results
  82 for ((thread = 0; thread < $THREADS; thread++)); do
  83     dev=${DEV}@${thread}
  84     echo "Device: $dev"
  85     cat /proc/net/pktgen/$dev | grep -A2 "Result:"
  86 done