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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/samples/pktgen/pktgen_sample05_flow_per_thread.sh
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#!/bin/bash

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# SPDX-License-Identifier: GPL-2.0

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#

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# Script will generate one flow per thread (-t N)

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#  - Same destination IP

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#  - Fake source IPs for each flow (fixed based on thread number)

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#

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# Useful for scale testing on receiver, to see whether silo'ing flows

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# works and scales.  For optimal scalability (on receiver) each

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# separate-flow should not access shared variables/data. This script

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# helps magnify any of these scaling issues by overloading the receiver.

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#

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basedir=`dirname $0`

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source ${basedir}/functions.sh

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root_check_run_with_sudo "$@"

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# Parameter parsing via include

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source ${basedir}/parameters.sh

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# Trap EXIT first

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trap_exit

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# Set some default params, if they didn't get set

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if [ -z "$DEST_IP" ]; then

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    [ -z "$IP6" ] && DEST_IP="198.18.0.42" || DEST_IP="FD00::1"

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fi

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[ -z "$DST_MAC" ]   && DST_MAC="90:e2:ba:ff:ff:ff"

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[ -z "$CLONE_SKB" ] && CLONE_SKB="0"

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[ -z "$BURST" ]     && BURST=32

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[ -z "$COUNT" ]     && COUNT="0" # Zero means indefinitely

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if [ -n "$DEST_IP" ]; then

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    validate_addr${IP6} $DEST_IP

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    read -r DST_MIN DST_MAX <<< $(parse_addr${IP6} $DEST_IP)

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fi

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if [ -n "$DST_PORT" ]; then

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    read -r UDP_DST_MIN UDP_DST_MAX <<< $(parse_ports $DST_PORT)

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    validate_ports $UDP_DST_MIN $UDP_DST_MAX

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fi

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# General cleanup everything since last run

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[ -z "$APPEND" ] && pg_ctrl "reset"

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# Threads are specified with parameter -t value in $THREADS

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for ((thread = $F_THREAD; thread <= $L_THREAD; thread++)); do

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    dev=${DEV}@${thread}

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    # Add remove all other devices and add_device $dev to thread

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    [ -z "$APPEND" ] && pg_thread $thread "rem_device_all"

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    pg_thread $thread "add_device" $dev

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    # Base config

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    pg_set $dev "flag QUEUE_MAP_CPU"

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    pg_set $dev "count $COUNT"

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    pg_set $dev "clone_skb $CLONE_SKB"

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    pg_set $dev "pkt_size $PKT_SIZE"

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    pg_set $dev "delay $DELAY"

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    pg_set $dev "flag NO_TIMESTAMP"

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    # Single destination

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    pg_set $dev "dst_mac $DST_MAC"

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    pg_set $dev "dst${IP6}_min $DST_MIN"

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    pg_set $dev "dst${IP6}_max $DST_MAX"

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    if [ -n "$DST_PORT" ]; then

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	# Single destination port or random port range

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	pg_set $dev "flag UDPDST_RND"

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	pg_set $dev "udp_dst_min $UDP_DST_MIN"

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	pg_set $dev "udp_dst_max $UDP_DST_MAX"

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    fi

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    [ ! -z "$UDP_CSUM" ] && pg_set $dev "flag UDPCSUM"

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    # Setup source IP-addresses based on thread number

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    pg_set $dev "src_min 198.18.$((thread+1)).1"

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    pg_set $dev "src_max 198.18.$((thread+1)).1"

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    # Setup burst, for easy testing -b 0 disable bursting

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    # (internally in pktgen default and minimum burst=1)

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    if [[ ${BURST} -ne 0 ]]; then

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	pg_set $dev "burst $BURST"

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    else

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	info "$dev: Not using burst"

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    fi

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done

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# Run if user hits control-c

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function print_result() {

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    # Print results

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    for ((thread = $F_THREAD; thread <= $L_THREAD; thread++)); do

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	dev=${DEV}@${thread}

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	echo "Device: $dev"

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	cat /proc/net/pktgen/$dev | grep -A2 "Result:"

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    done

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}

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# trap keyboard interrupt (Ctrl-C)

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trap true SIGINT

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if [ -z "$APPEND" ]; then

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    echo "Running... ctrl^C to stop" >&2

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    pg_ctrl "start"

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    print_result

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else

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    echo "Append mode: config done. Do more or use 'pg_ctrl start' to run"

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fi

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