#!/bin/sh
#
# stream_range
#
# generate a whole lot of numbers from netperf to see the effects
# of send size on thruput
#

#
# usage : tcp_stream_range hostname
#

if [ $# -gt 1 ]; then
	echo "try again, correctly -> tcp_stream_range hostname"
	exit 1
fi

#
# some params
#
if [ $# -eq 1 ]; then
	REMHOST=$1
else
	echo "try again, correctly -> tcp_stream_range hostname"
	exit 1
fi

# where is netperf, and are there any "constant" options such as 
# the netserver port number
NETHOME=/usr/etc/net_perf
NETPERF=$NETHOME/netperf
#NETPERF="./nepterf -p 12865"

#
# some stuff for the arithmatic 
#
# we start at start, and then multiply by MULT and add ADD. by changing
# these numbers, we can double each time, or increase by a fixed ammount
#
START=1

END=32768

MULT=2

ADD=0

# Do we wish to measure CPU utilization?
LOC_CPU=""
REM_CPU=""
#LOC_CPU="-c"
#REM_CPU="-C"

# If we are measuring CPU utilization, then we can save beaucoup
# time by saving the results of the CPU calibration and passing
# them in during the real tests. So, we execute the new CPU "tests"
# of netperf and put the values into shell vars.
case $LOC_CPU in
\-c) LOC_RATE=`$NETPERF -t LOC_CPU`;;
*) LOC_RATE=""
esac

case $REM_CPU in
\-C) REM_RATE=`$NETPERF -t REM_CPU -H $REMHOST`;;
*) REM_RATE=""
esac

TIME="60"

# after the first datapoint, we don't want more headers
# but we want one for the first one
NO_HDR=""


MESSAGE=$START
while [ $MESSAGE -le $END ]; do
	$NETPERF -l $TIME -H $REMHOST -t TCP_STREAM\
          $LOC_CPU $LOC_RATE $REM_CPU $REM_RATE $NO_HDR --\
          -m $MESSAGE -s 32768 -S 32768 
	NO_HDR="-P 0"
	MESSAGE=`expr $MESSAGE + $ADD`
	MESSAGE=`expr $MESSAGE \* $MULT`
done