run_vmtests

#!/bin/bash
#please run as root

echo "cat /proc/meminfo"
cat /proc/meminfo

echo "cat /proc/sys/vm/nr_hugepages"
cat /proc/sys/vm/nr_hugepages

echo "cat /proc/slabinfo"
cat /proc/slabinfo

echo "cat /proc/buddyinfo"
cat /proc/buddyinfo


#we need 256M, below is the size in kB
needmem=262144
mnt=./huge
exitcode=0

#get pagesize and freepages from /proc/meminfo
while read name size unit; do
	if [ "$name" = "HugePages_Free:" ]; then
		freepgs=$size
	fi
	if [ "$name" = "Hugepagesize:" ]; then
		pgsize=$size
	fi
done < /proc/meminfo

#set proper nr_hugepages
if [ -n "$freepgs" ] && [ -n "$pgsize" ]; then
	nr_hugepgs=`cat /proc/sys/vm/nr_hugepages`
	needpgs=`expr $needmem / $pgsize`
	tries=2
	while [ $tries -gt 0 ] && [ $freepgs -lt $needpgs ]; do
		lackpgs=$(( $needpgs - $freepgs ))
		echo 3 > /proc/sys/vm/drop_caches
		echo $(( $lackpgs + $nr_hugepgs )) > /proc/sys/vm/nr_hugepages
		if [ $? -ne 0 ]; then
			echo "Please run this test as root"
			exit 1
		fi
		while read name size unit; do
			if [ "$name" = "HugePages_Free:" ]; then
				freepgs=$size
			fi
		done < /proc/meminfo
		tries=$((tries - 1))
	done
	if [ $freepgs -lt $needpgs ]; then
		printf "Not enough huge pages available (%d < %d)\n" \
		       $freepgs $needpgs
		exit 1
	fi
else
	echo "no hugetlbfs support in kernel?"
	exit 1
fi

mkdir $mnt
mount -t hugetlbfs none $mnt

#cleanup
umount $mnt
rm -rf $mnt
echo $nr_hugepgs > /proc/sys/vm/nr_hugepages

echo "-----------------------"
echo "running compaction_test"
echo "-----------------------"
./compaction_test
if [ $? -ne 0 ]; then
	echo "[FAIL]"
	exitcode=1
else
	echo "[PASS]"
fi


echo "cat /proc/meminfo"
cat /proc/meminfo

echo "cat /proc/sys/vm/nr_hugepages"
cat /proc/sys/vm/nr_hugepages

echo "cat /proc/slabinfo"
cat /proc/slabinfo

echo "cat /proc/buddyinfo"
cat /proc/buddyinfo

exit $exitcode