Commit 282fb589 authored by Jesper Dangaard Brouer's avatar Jesper Dangaard Brouer Committed by David S. Miller
Browse files

pktgen: add sample script pktgen_sample02_multiqueue.sh 



Add the pktgen samples script pktgen_sample02_multiqueue.sh that
demonstrates generating packets on multiqueue NICs.

Specifically notice the options "-t" that specifies how many
kernel threads to activate.  Also notice the flag QUEUE_MAP_CPU,
which cause the SKB TX queue to be mapped to the CPU running the
kernel thread.  For best scalability people are also encourage to
map NIC IRQ /proc/irq/*/smp_affinity to CPU number.

Usage example with "-t" 4 threads and help:
 ./pktgen_sample02_multiqueue.sh -i eth4 -m 00:1B:21:3C:9D:F8 -t 4

Usage: ./pktgen_sample02_multiqueue.sh [-vx] -i ethX
  -i : ($DEV)       output interface/device (required)
  -s : ($PKT_SIZE)  packet size
  -d : ($DEST_IP)   destination IP
  -m : ($DST_MAC)   destination MAC-addr
  -t : ($THREADS)   threads to start
  -c : ($SKB_CLONE) SKB clones send before alloc new SKB
  -b : ($BURST)     HW level bursting of SKBs
  -v : ($VERBOSE)   verbose
  -x : ($DEBUG)     debug

Removing pktgen.conf-2-1 and pktgen.conf-2-2 as these examples
should be covered now.

Signed-off-by: default avatarJesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 6f094797

Documentation/networking/pktgen.txt

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@@ -244,8 +244,6 @@ pktgen_sampleXX scripts and modify them to fit your own needs. 
The old scripts:



pktgen.conf-1-2                  # 1 CPU 2 dev

pktgen.conf-2-1                  # 2 CPU's 1 dev 

pktgen.conf-2-2                  # 2 CPU's 2 dev

pktgen.conf-1-1-rdos             # 1 CPU 1 dev w. route DoS 

pktgen.conf-1-1-ip6              # 1 CPU 1 dev ipv6

pktgen.conf-1-1-ip6-rdos         # 1 CPU 1 dev ipv6  w. route DoS

samples/pktgen/pktgen.conf-2-1

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#!/bin/bash



#modprobe pktgen





function pgset() {

    local result



    echo $1 > $PGDEV



    result=`cat $PGDEV | fgrep "Result: OK:"`

    if [ "$result" = "" ]; then

         cat $PGDEV | fgrep Result:

    fi

}



# Config Start Here -----------------------------------------------------------





# thread config

# Each CPU has its own thread. Two CPU example. We add eth1 to the first

# and leave the second idle.



PGDEV=/proc/net/pktgen/kpktgend_0

  echo "Removing all devices"

 pgset "rem_device_all"

  echo "Adding eth1"

 pgset "add_device eth1"



# We need to remove old config since we dont use this thread. We can only

# one NIC on one CPU due to affinity reasons.



PGDEV=/proc/net/pktgen/kpktgend_1

  echo "Removing all devices"

 pgset "rem_device_all"



# device config

# delay 0 means maximum speed.



CLONE_SKB="clone_skb 1000000"

# NIC adds 4 bytes CRC

PKT_SIZE="pkt_size 60"



# COUNT 0 means forever

#COUNT="count 0"

COUNT="count 10000000"

DELAY="delay 0"



PGDEV=/proc/net/pktgen/eth1

  echo "Configuring $PGDEV"

 pgset "$COUNT"

 pgset "$CLONE_SKB"

 pgset "$PKT_SIZE"

 pgset "$DELAY"

 pgset "dst 10.10.11.2"

 pgset "dst_mac  00:04:23:08:91:dc"





# Time to run

PGDEV=/proc/net/pktgen/pgctrl



 echo "Running... ctrl^C to stop"

 trap true INT

 pgset "start"

 echo "Done"

 cat /proc/net/pktgen/eth1

samples/pktgen/pktgen.conf-2-2

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Original line number Diff line number Diff line 
#!/bin/bash



#modprobe pktgen





function pgset() {

    local result



    echo $1 > $PGDEV



    result=`cat $PGDEV | fgrep "Result: OK:"`

    if [ "$result" = "" ]; then

         cat $PGDEV | fgrep Result:

    fi

}



# Config Start Here -----------------------------------------------------------





# thread config

# Each CPU has its own thread. Two CPU example. We add eth1, eth2 respectively.



PGDEV=/proc/net/pktgen/kpktgend_0

  echo "Removing all devices"

 pgset "rem_device_all"

  echo "Adding eth1"

 pgset "add_device eth1"



PGDEV=/proc/net/pktgen/kpktgend_1

  echo "Removing all devices"

 pgset "rem_device_all"

  echo "Adding eth2"

 pgset "add_device eth2"





# device config

# delay 0 means maximum speed.



CLONE_SKB="clone_skb 1000000"

# NIC adds 4 bytes CRC

PKT_SIZE="pkt_size 60"



# COUNT 0 means forever

#COUNT="count 0"

COUNT="count 10000000"

DELAY="delay 0"



PGDEV=/proc/net/pktgen/eth1

  echo "Configuring $PGDEV"

 pgset "$COUNT"

 pgset "$CLONE_SKB"

 pgset "$PKT_SIZE"

 pgset "$DELAY"

 pgset "dst 10.10.11.2"

 pgset "dst_mac  00:04:23:08:91:dc"



PGDEV=/proc/net/pktgen/eth2

  echo "Configuring $PGDEV"

 pgset "$COUNT"

 pgset "$CLONE_SKB"

 pgset "$PKT_SIZE"

 pgset "$DELAY"

 pgset "dst 192.168.2.2"

 pgset "dst_mac  00:04:23:08:91:de"



# Time to run

PGDEV=/proc/net/pktgen/pgctrl



 echo "Running... ctrl^C to stop"

 trap true INT

 pgset "start"

 echo "Done"

 cat /proc/net/pktgen/eth1 /proc/net/pktgen/eth2

samples/pktgen/pktgen_sample02_multiqueue.sh

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#!/bin/bash

#

# Multiqueue: Using pktgen threads for sending on multiple CPUs

#  * adding devices to kernel threads

#  * notice the naming scheme for keeping device names unique

#  * nameing scheme: dev@thread_number

#  * flow variation via random UDP source port

#

basedir=`dirname $0`

source ${basedir}/functions.sh

root_check_run_with_sudo "$@"

#

# Required param: -i dev in $DEV

source ${basedir}/parameters.sh



# Base Config

DELAY="0"        # Zero means max speed

COUNT="100000"   # Zero means indefinitely

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



# Flow variation random source port between min and max

UDP_MIN=9

UDP_MAX=109



# (example of setting default params in your script)

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

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



# 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

    # The device name is extended with @name, using thread number to

    # make then unique, but any name will 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



    # Notice config queue to map to cpu (mirrors smp_processor_id())

    # It is beneficial to map IRQ /proc/irq/*/smp_affinity 1:1 to CPU number

    pg_set $dev "flag QUEUE_MAP_CPU"



    # Base config of dev

    pg_set $dev "count $COUNT"

    pg_set $dev "clone_skb $CLONE_SKB"

    pg_set $dev "pkt_size $PKT_SIZE"

    pg_set $dev "delay $DELAY"



    # Flag example disabling timestamping

    pg_set $dev "flag NO_TIMESTAMP"



    # Destination

    pg_set $dev "dst_mac $DST_MAC"

    pg_set $dev "dst $DEST_IP"



    # Setup random UDP port src range

    pg_set $dev "flag UDPSRC_RND"

    pg_set $dev "udp_src_min $UDP_MIN"

    pg_set $dev "udp_src_max $UDP_MAX"

done



# start_run

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

pg_ctrl "start"

echo "Done" >&2



# Print results

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

    dev=${DEV}@${thread}

    echo "Device: $dev"

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

done

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