On Fri, Aug 05, 2022 at 11:04:22AM -0600, Jens Axboe wrote:
On 8/5/22 9:42 AM, Kanchan Joshi wrote:
Hi,
Series enables async polling on io_uring command, and nvme passthrough
(for io-commands) is wired up to leverage that.
512b randread performance (KIOP) below:
QD_batch block passthru passthru-poll block-poll
1_1 80 81 158 157
8_2 406 470 680 700
16_4 620 656 931 920
128_32 879 1056 1120 1132
Curious on why passthru is slower than block-poll? Are we missing
something here?
passthru-poll vs block-poll you mean?
passthru does not have bio-cache, while block path is running with that.
Maybe completion-batching is also playing some role, not too sure about that
at the moment.
