#!/bin/bash

DEV=/dev/hdb1
NLOOPS=100
ILOOPS=200
NPROC=4

mount /dev/hdb1 /mnt

echo cfq > /sys/block/hdb/queue/scheduler

for ((i=0;i<NLOOPS;i++)) ; do
	for ((j=0;j<NPROC;j++)) ; do
		tiobench --numruns 5 --size 128 --dir /mnt --threads 1 &
	done

	for ((k=0;k<ILOOPS;k++)) ; do
		sleep .5
		echo noop > /sys/block/hdb/queue/scheduler
		rmmod cfq-iosched
		echo cfq > /sys/block/hdb/queue/scheduler
	done
	wait
done