#!/bin/sh

. ./hw_vars

create_sparse_file $SPARSE_FILE $mem

migrate_unit=$((mem/nr_node/2))
numactl --interleave=all $USEMEM -f $SPARSE_FILE --readonly $migrate_unit --detach --sleep $((runtime * 2)) --pid-file $PIDFILE

pid=$(cat $PIDFILE)
rm $PIDFILE
rm $SPARSE_FILE

start_time=$(date +%s%N)
start_time=${start_time%???}

count=0
while :
do
	for i in `seq $nr_node`
	do
		migratepages $pid $((i-1)) $(($i%$nr_node))
		now=$(date +%s%N)
		now=${now%???}
		count=$((count+1))
		usecs=$(( now - start_time  ))
		[ "$usecs" -gt ${runtime}000000  ] && break 2
	done
done

throughput=$((count * migrate_unit / usecs))
echo "$count * $migrate_unit bytes migrated, $usecs usecs, $throughput MB/s"

kill -INT $pid

# the sleep is necessary for umount to succeed
# it takes some time to kill the usemem process
while [ -d /proc/$pid -a "$(cat /proc/$pid/comm 2>/dev/null)" = 'usemem' ]
do
	sleep 0.1
done