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# a crude script to try to find the burst size which results in
# something approximating peak transactions per second. once we
# pass the peak, we may want to refine further but for now, this
# should suffice
LAST_TPS=0
BURST=1
LAST_BURST=0
NETPERF=${NETPERF:="netperf"}
TMP_TPS=`$NETPERF -t UDP_RR -P 0 -H $1 -- -b $BURST -D -o throughput -e 1 -s 1M -S 1M`
if [ $? -ne 0 ]
then
echo -1
exit -1
fi
CUR_TPS=`echo $TMP_TPS | awk '{print int($1)}'`
while [ $CUR_TPS -gt $LAST_TPS ]
do
LAST_BURST=$BURST
BURST=`expr $BURST \* 2`
LAST_TPS=$CUR_TPS
TMP_TPS=`$NETPERF -t UDP_RR -P 0 -H $1 -- -b $BURST -D -o throughput -e 1 -s 1M -S 1M`
if [ $? -ne 0 ]
then
echo -1
exit -1
fi
CUR_TPS=`echo $TMP_TPS | awk '{print int($1)}'`
done
# if we were going to further refine the estimate we would probably do
# a binary search at this point but for now, just emit the value of
# LAST_BURST and be done with it.
echo $LAST_BURST
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