On 11/30/21 7:40 AM, Bean Huo wrote:
It is the test case in your commit message. If iodepth=1, there is no performance improvement. Increase the io-depth to multiple, for example, let iodepth= CPU core counter. I see that the interrupt overhead is significantly increased when the request is completed, so IO_polling will win compared to the interrupt mode.
Hi Bean, It is not guaranteed that polling will result in a significant performance improvement. I assume that on my test setup the improvement is so significant because the interrupt coalescing delay. Maybe the interrupt coalescing delay is much smaller on your test setup. Bart.
