Performance test with btrfs perf interface

perf_test.sh

#!/bin/bash

dev=/dev/test/test
mnt=/mnt/btrfs
trace_result="/home/adam/trace"

_fail()
{
	echo "!!! FAILED: $@ !!!"
	exit 1
}

start_trace()
{
	while true; do
		sleep 1
		cat /sys/fs/btrfs/1b4e28ba-2fa1-11d2-883f-b9a761bde3fb/profiler >> $trace_result
	done
}

umount $dev &> /dev/null
umount $mnt &> /dev/null

rm $trace_result
wipefs -fa $dev
mkfs.btrfs -f $dev -U 1b4e28ba-2fa1-11d2-883f-b9a761bde3fb

mount $dev $mnt -o enospc_debug

start_trace &
trace_pid=$!

/home/adam/xfstests-dev/ltp/fsstress -d $mnt -w -n 10000000 -p 4 &
sleep 120

killall -KILL fsstress
kill $trace_pid