On Tue, Nov 01, 2016 at 03:05:24PM -0600, Jens Axboe 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 > a sleep/wakeup cycle in the IO path, but instead of the wakeup happening > after the IO has completed, it'll happen before. With this hybrid > scheme, we can achieve big latency reductions while still using the same > (or less) amount of CPU. > > Signed-off-by: Jens Axboe <axboe@xxxxxx> This looks very nice. I'll need to run some tests before giving the formal ACK, though. -- To unsubscribe from this list: send the line "unsubscribe linux-block" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
