#!/bin/bash
create_file()
{
        local dir=$1
        local direct=$2
        local i=0

        mkdir -p $dir >/dev/null 2>&1
        local STARTTIME=$(date +%s)
        while xfs_io -f $direct -c "pwrite 0 1k" $dir/file_$i >/dev/null 2>&1; do
                let i=$i+1
        done

        local ENDTIME=$(date +%s)
        echo "Created $i files before returning error, time taken $(($ENDTIME - $STARTTIME))"
}


dir=/media/scratch/testdir/
loop=1
i=1
while [ $i -le $loop ]; do
        nr_worker=8
        while [ $nr_worker -gt 0 ]; do
                # half buffered I/O half direct I/O
                if [ `expr $nr_worker % 2` -eq 0 ]; then
                        create_file $dir/$nr_worker -d &
                else
                        create_file $dir/$nr_worker &
                fi
                let nr_worker=$nr_worker-1
        done
        wait
        STARTTIME=$(date +%s)
        rm -rf $dir
        ENDTIME=$(date +%s)
        echo "rming took $(($ENDTIME - $STARTTIME)) seconds"
        let i=$i+1
done