Quelle pktgen_sample03_burst_single_flow.sh
Sprache: Shell
#!/bin/bash # SPDX-License-Identifier: GPL-2.0 # # Script for max single flow performance # - If correctly tuned[1], single CPU 10G wirespeed small pkts is possible[2] # # Using pktgen "burst" option (use -b $N) # - To boost max performance # - Avail since: kernel v3.18 # * commit 38b2cf2982dc73 ("net: pktgen: packet bursting via skb->xmit_more") # - This avoids writing the HW tailptr on every driver xmit # - The performance boost is impressive, see commit and blog [2] # # Notice: On purpose generates a single (UDP) flow towards target, # reason behind this is to only overload/activate a single CPU on # target host. And no randomness for pktgen also makes it faster. # # Tuning see: # [1] http://netoptimizer.blogspot.dk/2014/06/pktgen-for-network-overload-testing.html # [2] http://netoptimizer.blogspot.dk/2014/10/unlocked-10gbps-tx-wirespeed-smallest.html #
basedir=`dirname $0`
source ${basedir}/functions.sh
root_check_run_with_sudo "$@"
# Parameter parsing via include
source ${basedir}/parameters.sh
# Trap EXIT first
trap_exit
# Set some default params, if they didn't get set if [ -z "$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 "$BURST" ] && BURST=32
[ -z "$CLONE_SKB" ] && CLONE_SKB="0"# No need for clones when bursting
[ -z "$COUNT" ] && COUNT="0"# Zero means indefinitely if [ -n "$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 $UDP_DST_MAX fi
# General cleanup everything since last run
[ -z "$APPEND" ] && pg_ctrl "reset"
# Threads are specified with parameter -t value in $THREADS for ((thread = $F_THREAD; thread <= $L_THREAD; thread++)); do
dev=${DEV}@${thread}
# Add remove all other devices and add_device $dev to thread
[ -z "$APPEND" ] && pg_thread $thread "rem_device_all"
pg_thread $thread "add_device" $dev
if [ -n "$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
# Setup burst, for easy testing -b 0 disable bursting # (internally in pktgen default and minimum burst=1) if [[ ${BURST} -ne 0 ]]; then
pg_set $dev "burst $BURST" else
info "$dev: Not using burst" fi 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
if [ -z "$APPEND" ]; then echo"Running... ctrl^C to stop" >&2
pg_ctrl "start"
print_result else echo"Append mode: config done. Do more or use 'pg_ctrl start' to run" fi
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