diff options
Diffstat (limited to 'samples/pktgen/pktgen_sample03_burst_single_flow.sh')
-rwxr-xr-x | samples/pktgen/pktgen_sample03_burst_single_flow.sh | 110 |
1 files changed, 110 insertions, 0 deletions
diff --git a/samples/pktgen/pktgen_sample03_burst_single_flow.sh b/samples/pktgen/pktgen_sample03_burst_single_flow.sh new file mode 100755 index 0000000000..8f8ed1ac46 --- /dev/null +++ b/samples/pktgen/pktgen_sample03_burst_single_flow.sh @@ -0,0 +1,110 @@ +#!/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 + + # Base config + pg_set $dev "flag QUEUE_MAP_CPU" + pg_set $dev "count $COUNT" + pg_set $dev "clone_skb $CLONE_SKB" + 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 $UDP_DST_MAX" + fi + + [ ! -z "$UDP_CSUM" ] && pg_set $dev "flag UDPCSUM" + + # 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 |