t/io_uring: support NUMA placement

A few other changes in here as well that I didn't bother splitting
out:

- Use M for millions of IOPS
- Cleanup the init prints a bit
- Don't track file depths, becomes prohibitive on large number of files
  or devices.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
1 file changed