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# 30basedir=`dirname $0` 31source ${basedir}/functions.sh 32root_check_run_with_sudo "$@" 33 34# Parameter parsing via include 35source ${basedir}/parameters.sh 36# Using invalid DST_MAC will cause the packets to get dropped in 37# ip_rcv() which is part of the test 38if [ -z "$DEST_IP" ]; then 39 [ -z "$IP6" ] && DEST_IP="198.18.0.42" || DEST_IP="FD00::1" 40fi 41[ -z "$DST_MAC" ] && DST_MAC="90:e2:ba:ff:ff:ff" 42[ -z "$BURST" ] && BURST=1024 43[ -z "$COUNT" ] && COUNT="10000000" # Zero means indefinitely 44if [ -n "$DEST_IP" ]; then 45 validate_addr${IP6} $DEST_IP 46 read -r DST_MIN DST_MAX <<< $(parse_addr${IP6} $DEST_IP) 47fi 48if [ -n "$DST_PORT" ]; then 49 read -r UDP_DST_MIN UDP_DST_MAX <<< $(parse_ports $DST_PORT) 50 validate_ports $UDP_DST_MIN $UDP_DST_MAX 51fi 52 53# General cleanup everything since last run 54pg_ctrl "reset" 55 56# Threads are specified with parameter -t value in $THREADS 57for ((thread = $F_THREAD; thread <= $L_THREAD; thread++)); do 58 # The device name is extended with @name, using thread number to 59 # make then unique, but any name will do. 60 dev=${DEV}@${thread} 61 62 # Add remove all other devices and add_device $dev to thread 63 pg_thread $thread "rem_device_all" 64 pg_thread $thread "add_device" $dev 65 66 # Base config of dev 67 pg_set $dev "flag QUEUE_MAP_CPU" 68 pg_set $dev "count $COUNT" 69 pg_set $dev "pkt_size $PKT_SIZE" 70 pg_set $dev "delay $DELAY" 71 pg_set $dev "flag NO_TIMESTAMP" 72 73 # Destination 74 pg_set $dev "dst_mac $DST_MAC" 75 pg_set $dev "dst${IP6}_min $DST_MIN" 76 pg_set $dev "dst${IP6}_max $DST_MAX" 77 78 if [ -n "$DST_PORT" ]; then 79 # Single destination port or random port range 80 pg_set $dev "flag UDPDST_RND" 81 pg_set $dev "udp_dst_min $UDP_DST_MIN" 82 pg_set $dev "udp_dst_max $UDP_DST_MAX" 83 fi 84 85 # Inject packet into RX path of stack 86 pg_set $dev "xmit_mode netif_receive" 87 88 # Burst allow us to avoid measuring SKB alloc/free overhead 89 pg_set $dev "burst $BURST" 90done 91 92# Run if user hits control-c 93function print_result() { 94 # Print results 95 for ((thread = $F_THREAD; thread <= $L_THREAD; thread++)); do 96 dev=${DEV}@${thread} 97 echo "Device: $dev" 98 cat /proc/net/pktgen/$dev | grep -A2 "Result:" 99 done 100} 101# trap keyboard interrupt (Ctrl-C) 102trap true SIGINT 103 104# start_run 105echo "Running... ctrl^C to stop" >&2 106pg_ctrl "start" 107echo "Done" >&2 108 109print_result 110