On Wed, Nov 2, 2016 at 5:05 AM, Jens Axboe <axboe@xxxxxx> wrote:
This patch enables a hybrid polling mode. Instead of polling after IO
submission, we can induce an artificial delay, and then poll after that.
For example, if the IO is presumed to complete in 8 usecs from now, we
can sleep for 4 usecs, wake up, and then do our polling. This still puts
I guess in reality it isn't easy to figure a perfect poll time:
- for one driver, different CPU and different drive/disk may cause different
- for requests with different size, the completion time can be different too
Is there one way to figure out the poll time automatically?