#!/bin/bash # SPDX-License-Identifier: GPL-2.0 # # Benchmark script: # - developed for benchmarking ingress qdisc path # # Script for injecting packets into RX path of the stack with pktgen # "xmit_mode netif_receive". With an invalid dst_mac this will only # measure the ingress code path as packets gets dropped in ip_rcv(). # # This script don't really need any hardware. It benchmarks software # RX path just after NIC driver level. With bursting is also # "removes" the SKB alloc/free overhead. # # Setup scenarios for measuring ingress qdisc (with invalid dst_mac): # ------------------------------------------------------------------ # (1) no ingress (uses static_key_false(&ingress_needed)) # # (2) ingress on other dev (change ingress_needed and calls # handle_ing() but exit early) # # config: tc qdisc add dev $SOMEDEV handle ffff: ingress # # (3) ingress on this dev, handle_ing() -> tc_classify() # # config: tc qdisc add dev $DEV handle ffff: ingress # # (4) ingress on this dev + drop at u32 classifier/action. # basedir=`dirname $0` source ${basedir}/functions.sh root_check_run_with_sudo "$@" # Parameter parsing via include source ${basedir}/parameters.sh # Using invalid DST_MAC will cause the packets to get dropped in # ip_rcv() which is part of the test if [ -z "$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" [ -z "$BURST" ] && BURST=1024 [ -z "$COUNT" ] && COUNT="10000000" # Zero means indefinitely 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 ((thread = $F_THREAD; thread <= $L_THREAD; thread++)); do # The device name is extended with @name, using thread number to # make then unique, but any name will do. dev=${DEV}@${thread} # Add remove all other devices and add_device $dev to thread pg_thread $thread "rem_device_all" pg_thread $thread "add_device" $dev # Base config of dev pg_set $dev "flag QUEUE_MAP_CPU" pg_set $dev "count $COUNT" pg_set $dev "pkt_size $PKT_SIZE" pg_set $dev "delay $DELAY" 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 # Inject packet into RX path of stack pg_set $dev "xmit_mode netif_receive" # Burst allow us to avoid measuring SKB alloc/free overhead pg_set $dev "burst $BURST" done # Run if user hits control-c function print_result() { # Print results for ((thread = $F_THREAD; thread <= $L_THREAD; thread++)); do dev=${DEV}@${thread} echo "Device: $dev" cat /proc/net/pktgen/$dev | grep -A2 "Result:" done } # trap keyboard interrupt (Ctrl-C) trap true SIGINT # start_run echo "Running... ctrl^C to stop" >&2 pg_ctrl "start" echo "Done" >&2 print_result