#!/usr/bin/ksh
#
# (c)2009 lists@nerdbynature.de
# Benchmark (hah!) several ext* mount options
#
OPTIONS="orlov oldalloc atime noatime data=journal data=ordered data=writeback acl noacl user_xattr nouser_xattr"
MP=/mnt/d1
TAR=/mnt/d2/linux.tar

# unset me!
# DEBUG=echo

if [ ! -b "$1" -o ! -d "$MP" -o ! -f "$TAR" ]; then
	echo "Usage: $0 [dev]"
	echo "Also, please check my config!"
	exit 1
else
	DEV="$1"
fi

for fs in ext2 ext3 ext4; do
	for o in $OPTIONS; do
		printf "$fs option: $o	"
		j=0
		R=0
		while [ $j -lt 3 ]; do
		$DEBUG mkfs."$fs" -q "$DEV"
		$DEBUG mount -t $fs -o $o "$DEV" "$MP" 2>/dev/null
		if [ ! $? = 0 ]; then
			printf "not supported for $fs!"
			j=3
			continue
		fi
		TB=`date +%s`
		$DEBUG tar -C "$MP" -xf "$TAR"
		$DEBUG sync
		$DEBUG rm -rf "$MP"/*
		$DEBUG sync
		TE=`date +%s`
		R=`echo $TE - $TB + $R | bc`
		$DEBUG umount "$MP"
		((j++))
		done
		AVG=`echo "scale=2; $R / 3" | bc -l`
		printf -- " - $AVG sec"
		echo
	done
	echo
done