とある理由で、FreeBSDでTraffic Generatorを作成しなければならなくなった。

というわけでその記録

CPU

AMD Ryzen7 PRO 4750G

Motherboard

ASRock B550M-ITX/AC

Memory

DDR4-3200 8G x2

NIC

HPE 560SFP+ (82599) 2port

他に、Diskなどもあるが、この辺は影響はほぼないので割愛。
NICは、他に、HUAWEI CN21ITGH(Intel X710)を準備してある。

• FreeBSD 12.1-RELEASEをInstall
  • 追加は何も入れない。加えて、srcやlib32などはInstallしない
• freebsd-update を実行して最新にする
• /usr/src以下をsvnを用いて取得する
  • svnlite checkout https://svn0.us-west.FreeBSD.org/base/releng/12.1 /usr/src

どのように構成するにしても、netmapを利用して、NICにDirectにpacketを送り出した上でハードウェア的にどのくらい性能が出せそうかを見積もる必要がある。 また、そもそもNICがnetmapをどの程度利用できるかを確認する必要もあるので、予備試験。

佐藤先生から頂いた、簡易試験用のscript

netmap_test.sh

#!/bin/sh
# ---- Configuration
SRCDIR=/usr/src
SRCIF=bge0
SRC_ADDR=192.168.100.104
DST_ADDR=192.168.100.2
FUNC=${1-tx}
#
COUNT=100
LEN=64
THREADS=1
# ----

# Copyright (c) 2020 Hiroki Sato <hrs@allbsd.org>
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in the
#    documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.

LOG=netmap_test-`date +%Y%m%d-%H%M%S`.log
err() { echo "ERROR: " $* 1>&2; exit 1; }
NETMAPDIR=$SRCDIR/tools/tools/netmap

# build pkg-gen first
(cd $NETMAPDIR && make obj && make)
case $? in
0)
	# do nothing
;;
*)
	err "building of pkg-gen failed."
;;
esac
PKTGEN_CMD=`cd $NETMAPDIR && make -V.OBJDIR`/pkt-gen
SRC_MAC=`arp -an | awk "/$SRC_ADDR/{print \\$4}"`
if [ -z "$SRC_MAC" ]; then
	err "$SRC_ADDR not found on this host."
fi
if ping -o -c 2 $DST_ADDR > /dev/null 2>&1; then
	DST_MAC=`arp -an | awk "/$DST_ADDR/{print \\$4}"`
else
	err "$DST_ADDR did not respond."
fi

CMD="$PKTGEN_CMD
  -A
  -p $THREADS
  -c 0
  -f $FUNC
  -i $SRCIF
  -n $COUNT
  -l $LEN
  -s $SRC_ADDR
  -S $SRC_MAC
  -d $DST_ADDR
  -D $DST_MAC
"
(
	echo COMMAND: $CMD
	$CMD
) 2>&1 | tee $LOG
echo "--> logfile: $LOG"