samples/pktgen/pktgen_bench_xmit_mode_netif_receive.sh

   1 #!/bin/bash
   2 # SPDX-License-Identifier: GPL-2.0
   3 #
   4 # Benchmark script:
   5 #  - developed for benchmarking ingress qdisc path
   6 #
   7 # Script for injecting packets into RX path of the stack with pktgen
   8 # "xmit_mode netif_receive".  With an invalid dst_mac this will only
   9 # measure the ingress code path as packets gets dropped in ip_rcv().
  10 #
  11 # This script don't really need any hardware.  It benchmarks software
  12 # RX path just after NIC driver level.  With bursting is also
  13 # "removes" the SKB alloc/free overhead.
  14 #
  15 # Setup scenarios for measuring ingress qdisc (with invalid dst_mac):
  16 # ------------------------------------------------------------------
  17 # (1) no ingress (uses static_key_false(&ingress_needed))
  18 #
  19 # (2) ingress on other dev (change ingress_needed and calls
  20 #     handle_ing() but exit early)
  21 #
  22 #  config:  tc qdisc add dev $SOMEDEV handle ffff: ingress
  23 #
  24 # (3) ingress on this dev, handle_ing() -> tc_classify()
  25 #
  26 #  config:  tc qdisc add dev $DEV handle ffff: ingress
  27 #
  28 # (4) ingress on this dev + drop at u32 classifier/action.
  29 #
  30 basedir=`dirname $0`
  31 source ${basedir}/functions.sh
  32 root_check_run_with_sudo "$@"
  33
  34 # Parameter parsing via include
  35 source ${basedir}/parameters.sh
  36 # Using invalid DST_MAC will cause the packets to get dropped in
  37 # ip_rcv() which is part of the test
  38 if [ -z "$DEST_IP" ]; then
  39     [ -z "$IP6" ] && DEST_IP="198.18.0.42" || DEST_IP="FD00::1"
  40 fi
  41 [ -z "$DST_MAC" ] && DST_MAC="90:e2:ba:ff:ff:ff"
  42 [ -z "$BURST" ] && BURST=1024
  43 [ -z "$COUNT" ] && COUNT="10000000" # Zero means indefinitely
  44
  45 # Base Config
  46 DELAY="0"        # Zero means max speed
  47
  48 # General cleanup everything since last run
  49 pg_ctrl "reset"
  50
  51 # Threads are specified with parameter -t value in $THREADS
  52 for ((thread = $F_THREAD; thread <= $L_THREAD; thread++)); do
  53     # The device name is extended with @name, using thread number to
  54     # make then unique, but any name will do.
  55     dev=${DEV}@${thread}
  56
  57     # Add remove all other devices and add_device $dev to thread
  58     pg_thread $thread "rem_device_all"
  59     pg_thread $thread "add_device" $dev
  60
  61     # Base config of dev
  62     pg_set $dev "flag QUEUE_MAP_CPU"
  63     pg_set $dev "count $COUNT"
  64     pg_set $dev "pkt_size $PKT_SIZE"
  65     pg_set $dev "delay $DELAY"
  66     pg_set $dev "flag NO_TIMESTAMP"
  67
  68     # Destination
  69     pg_set $dev "dst_mac $DST_MAC"
  70     pg_set $dev "dst$IP6 $DEST_IP"
  71
  72     # Inject packet into RX path of stack
  73     pg_set $dev "xmit_mode netif_receive"
  74
  75     # Burst allow us to avoid measuring SKB alloc/free overhead
  76     pg_set $dev "burst $BURST"
  77 done
  78
  79 # start_run
  80 echo "Running... ctrl^C to stop" >&2
  81 pg_ctrl "start"
  82 echo "Done" >&2
  83
  84 # Print results
  85 for ((thread = $F_THREAD; thread <= $L_THREAD; thread++)); do
  86     dev=${DEV}@${thread}
  87     echo "Device: $dev"
  88     cat /proc/net/pktgen/$dev | grep -A2 "Result:"
  89 done