Results folders:
..//2010-08-20_1016/btrfs8-20-base/btrfs1.ffsb.random_reads__threads_0128.10-08-20_10.57.04
..//2010-08-20_1016/btrfs8-20-base-nocow/btrfs1.ffsb.random_reads__threads_0128.10-08-20_15.02.57
..//2010-08-21_1031/btrfs8-20-perfpatch/btrfs1.ffsb.random_reads__threads_0128.10-08-21_11.12.19
..//2010-08-21_1031/btrfs8-20-perfpatch-nocow/btrfs1.ffsb.random_reads__threads_0128.10-08-21_15.19.17