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Commit d25692e4 authored by Jesper Dangaard Brouer's avatar Jesper Dangaard Brouer Committed by David S. Miller
Browse files

pktgen: add sample script pktgen_sample05_flow_per_thread.sh 



This pktgen sample script is useful for scalability testing a
receiver.  The script will simply generate one flow per
thread (option -t N) using the thread number as part of the
source IP-address.

The single flow sample (pktgen_sample03_burst_single_flow.sh)
have become quite popular, but it is important that developers
also make sure to benchmark scalability of multiple receive
queues.

Signed-off-by: default avatarJesper Dangaard Brouer <brouer@redhat.com>
Acked-by: default avatarAlexei Starovoitov <ast@kernel.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 15f2cbbd

samples/pktgen/pktgen_sample05_flow_per_thread.sh

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#!/bin/bash

#

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

#  - Same destination IP

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

#

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

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

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

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

#

basedir=`dirname $0`

source ${basedir}/functions.sh

root_check_run_with_sudo "$@"



# Parameter parsing via include

source ${basedir}/parameters.sh

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

[ -z "$DEST_IP" ]   && DEST_IP="198.18.0.42"

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

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

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





# Base Config

DELAY="0"  # Zero means max speed

COUNT="0"  # Zero means indefinitely



# General cleanup everything since last run

pg_ctrl "reset"



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

for ((thread = 0; thread < $THREADS; thread++)); do

    dev=${DEV}@${thread}



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

    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"



    # Single destination

    pg_set $dev "dst_mac $DST_MAC"

    pg_set $dev "dst $DEST_IP"



    # Setup source IP-addresses based on thread number

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

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



    # 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 = 0; thread < $THREADS; 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



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

pg_ctrl "start"



print_result