#!/bin/bash

NB_LEVEL="$1"

run()
{
        typeset LINEID="$1"
        typeset LOGFILE="$2"
        typeset CMD="$3"
        echo "$CMD"

        # LINEID: tag to identify the test
        # %e: Elapsed real time (in seconds)
        # %S: Total number of CPU-seconds that the process spent in kernel mode

        /usr/bin/time  -o "$LOGFILE" -a -f "$LINEID %e %S" $CMD
}


DEV="/dev/sdc1"
DIR="/mnt/test"
PWD=`pwd`
freemem=$( awk '/MemFree/ {print $2} ' /proc/meminfo )
filename="Lowmemfile"
CURRENT=$PWD


umount $DEV
if df | grep $DEV
then
        echo "ERROR: $DEV in use" 1>&2
        exit 1
fi

# memory stress
freemem=`expr $freemem \* 1024`
./LowMemory -F $filename -M $freemem

# here starts the test
for filesystem in \
        "ext3 data=ordered" \
        "ext3 data=writeback" \
        "ext3 data=ordered,extents" \
        "ext3 data=ordered,mballoc,extents" \
        "ext3 data=ordered,mballoc,delalloc,extents" \
        "ext3 data=writeback,extents" \
        "ext3 data=writeback,mballoc,extents" \
        "ext3 data=writeback,mballoc,delalloc,extents" 
do
        FS=${filesystem%% *}
        OPT=${filesystem##* }

        LOGFILE="${CURRENT}/${FS}_${OPT}"
        rm -f "$LOGFILE"

        CMD="mkfs -t $FS $DEV"
        echo $CMD
        if ! $CMD > /dev/null
        then
                echo "Failed !"
                exit 1
        fi
        echo mount -t $FS -o $OPT $DEV $DIR
        if ! mount -t $FS -o $OPT $DEV $DIR
        then
                echo "Failed !"
                exit 1
        fi


# large files
# write 10 files of 100MB on each directory
	run "write_large_files" "$LOGFILE" "$PWD/rectree_create.sh 0 $NB_LEVEL $DIR 10 100000000"
	run "large_files_deletion" "$LOGFILE" "$PWD/rectree_delete.sh 0  $NB_LEVEL $DIR 10"
	
# large number of files
# write 1000 files of 10MB on each directory
	run "write_large_number_of_files" "$LOGFILE" "$PWD/rectree_create.sh 0 $NB_LEVEL $DIR 1000 10000000"
	run "large_number_deletion " "$LOGFILE" "$PWD/rectree_delete.sh 0  $NB_LEVEL $DIR 1000"
        echo umount $DEV
        while ! umount $DEV
        do
                echo "Retry..."
                sleep 5
                echo umount $DEV
        done
done