Just run

./perf-test.py <profile>

The format of a profile is

[name]
option=value

The options are

directory - This is required, it is the directory used to test in.
fs - This is optional, but required if you are going to mkfs the fs each time.
mkfs - True/False, defaults to false, we will mkfs the fs at the start of the
	run
mkfs_opts - Options to pass to the mkfs command
umount - True/False, defaults to true, we will unmount/mount each time we do a
	test
device - This is required, it is the device that will be mounted/unmounted