1*4882a593Smuzhiyun#!/bin/bash 2*4882a593Smuzhiyun# SPDX-License-Identifier: GPL-2.0 3*4882a593Smuzhiyun# 4*4882a593Smuzhiyun# Script for max single flow performance 5*4882a593Smuzhiyun# - If correctly tuned[1], single CPU 10G wirespeed small pkts is possible[2] 6*4882a593Smuzhiyun# 7*4882a593Smuzhiyun# Using pktgen "burst" option (use -b $N) 8*4882a593Smuzhiyun# - To boost max performance 9*4882a593Smuzhiyun# - Avail since: kernel v3.18 10*4882a593Smuzhiyun# * commit 38b2cf2982dc73 ("net: pktgen: packet bursting via skb->xmit_more") 11*4882a593Smuzhiyun# - This avoids writing the HW tailptr on every driver xmit 12*4882a593Smuzhiyun# - The performance boost is impressive, see commit and blog [2] 13*4882a593Smuzhiyun# 14*4882a593Smuzhiyun# Notice: On purpose generates a single (UDP) flow towards target, 15*4882a593Smuzhiyun# reason behind this is to only overload/activate a single CPU on 16*4882a593Smuzhiyun# target host. And no randomness for pktgen also makes it faster. 17*4882a593Smuzhiyun# 18*4882a593Smuzhiyun# Tuning see: 19*4882a593Smuzhiyun# [1] http://netoptimizer.blogspot.dk/2014/06/pktgen-for-network-overload-testing.html 20*4882a593Smuzhiyun# [2] http://netoptimizer.blogspot.dk/2014/10/unlocked-10gbps-tx-wirespeed-smallest.html 21*4882a593Smuzhiyun# 22*4882a593Smuzhiyunbasedir=`dirname $0` 23*4882a593Smuzhiyunsource ${basedir}/functions.sh 24*4882a593Smuzhiyunroot_check_run_with_sudo "$@" 25*4882a593Smuzhiyun 26*4882a593Smuzhiyun# Parameter parsing via include 27*4882a593Smuzhiyunsource ${basedir}/parameters.sh 28*4882a593Smuzhiyun# Set some default params, if they didn't get set 29*4882a593Smuzhiyunif [ -z "$DEST_IP" ]; then 30*4882a593Smuzhiyun [ -z "$IP6" ] && DEST_IP="198.18.0.42" || DEST_IP="FD00::1" 31*4882a593Smuzhiyunfi 32*4882a593Smuzhiyun[ -z "$DST_MAC" ] && DST_MAC="90:e2:ba:ff:ff:ff" 33*4882a593Smuzhiyun[ -z "$BURST" ] && BURST=32 34*4882a593Smuzhiyun[ -z "$CLONE_SKB" ] && CLONE_SKB="0" # No need for clones when bursting 35*4882a593Smuzhiyun[ -z "$COUNT" ] && COUNT="0" # Zero means indefinitely 36*4882a593Smuzhiyunif [ -n "$DEST_IP" ]; then 37*4882a593Smuzhiyun validate_addr${IP6} $DEST_IP 38*4882a593Smuzhiyun read -r DST_MIN DST_MAX <<< $(parse_addr${IP6} $DEST_IP) 39*4882a593Smuzhiyunfi 40*4882a593Smuzhiyunif [ -n "$DST_PORT" ]; then 41*4882a593Smuzhiyun read -r UDP_DST_MIN UDP_DST_MAX <<< $(parse_ports $DST_PORT) 42*4882a593Smuzhiyun validate_ports $UDP_DST_MIN $UDP_DST_MAX 43*4882a593Smuzhiyunfi 44*4882a593Smuzhiyun 45*4882a593Smuzhiyun# Base Config 46*4882a593SmuzhiyunDELAY="0" # Zero means max speed 47*4882a593Smuzhiyun 48*4882a593Smuzhiyun# General cleanup everything since last run 49*4882a593Smuzhiyunpg_ctrl "reset" 50*4882a593Smuzhiyun 51*4882a593Smuzhiyun# Threads are specified with parameter -t value in $THREADS 52*4882a593Smuzhiyunfor ((thread = $F_THREAD; thread <= $L_THREAD; thread++)); do 53*4882a593Smuzhiyun dev=${DEV}@${thread} 54*4882a593Smuzhiyun 55*4882a593Smuzhiyun # Add remove all other devices and add_device $dev to thread 56*4882a593Smuzhiyun pg_thread $thread "rem_device_all" 57*4882a593Smuzhiyun pg_thread $thread "add_device" $dev 58*4882a593Smuzhiyun 59*4882a593Smuzhiyun # Base config 60*4882a593Smuzhiyun pg_set $dev "flag QUEUE_MAP_CPU" 61*4882a593Smuzhiyun pg_set $dev "count $COUNT" 62*4882a593Smuzhiyun pg_set $dev "clone_skb $CLONE_SKB" 63*4882a593Smuzhiyun pg_set $dev "pkt_size $PKT_SIZE" 64*4882a593Smuzhiyun pg_set $dev "delay $DELAY" 65*4882a593Smuzhiyun pg_set $dev "flag NO_TIMESTAMP" 66*4882a593Smuzhiyun 67*4882a593Smuzhiyun # Destination 68*4882a593Smuzhiyun pg_set $dev "dst_mac $DST_MAC" 69*4882a593Smuzhiyun pg_set $dev "dst${IP6}_min $DST_MIN" 70*4882a593Smuzhiyun pg_set $dev "dst${IP6}_max $DST_MAX" 71*4882a593Smuzhiyun 72*4882a593Smuzhiyun if [ -n "$DST_PORT" ]; then 73*4882a593Smuzhiyun # Single destination port or random port range 74*4882a593Smuzhiyun pg_set $dev "flag UDPDST_RND" 75*4882a593Smuzhiyun pg_set $dev "udp_dst_min $UDP_DST_MIN" 76*4882a593Smuzhiyun pg_set $dev "udp_dst_max $UDP_DST_MAX" 77*4882a593Smuzhiyun fi 78*4882a593Smuzhiyun 79*4882a593Smuzhiyun # Setup burst, for easy testing -b 0 disable bursting 80*4882a593Smuzhiyun # (internally in pktgen default and minimum burst=1) 81*4882a593Smuzhiyun if [[ ${BURST} -ne 0 ]]; then 82*4882a593Smuzhiyun pg_set $dev "burst $BURST" 83*4882a593Smuzhiyun else 84*4882a593Smuzhiyun info "$dev: Not using burst" 85*4882a593Smuzhiyun fi 86*4882a593Smuzhiyundone 87*4882a593Smuzhiyun 88*4882a593Smuzhiyun# Run if user hits control-c 89*4882a593Smuzhiyunfunction control_c() { 90*4882a593Smuzhiyun # Print results 91*4882a593Smuzhiyun for ((thread = $F_THREAD; thread <= $L_THREAD; thread++)); do 92*4882a593Smuzhiyun dev=${DEV}@${thread} 93*4882a593Smuzhiyun echo "Device: $dev" 94*4882a593Smuzhiyun cat /proc/net/pktgen/$dev | grep -A2 "Result:" 95*4882a593Smuzhiyun done 96*4882a593Smuzhiyun} 97*4882a593Smuzhiyun# trap keyboard interrupt (Ctrl-C) 98*4882a593Smuzhiyuntrap control_c SIGINT 99*4882a593Smuzhiyun 100*4882a593Smuzhiyunecho "Running... ctrl^C to stop" >&2 101*4882a593Smuzhiyunpg_ctrl "start" 102