f2fs_io: add test_create_perf command

A new command 'test_create_perf', has been introduced to measure
the performance of creating and deleting many files.

Signed-off-by: Daniel Lee <chullee@google.com>
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
1 file changed