fio: allow milliseconds on all time specifiers

This patch allows all time specifiers to be specified down to
milliseconds.  Default will stay seconds for compatibility with old
configs.

It also adds documentation to the existing time units day, hour and
minute.

Signed-off-by: Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
5 files changed