On Tue, Feb 8, 2022 at 3:20 PM Nick Neumann <nick@xxxxxxxxxxxxxxxx> wrote: > Ah, thank you very much for finding and sharing those. That is very > helpful. If Jens or Jeff Furlong has any memories of some of the cases > with io_uring that are problematic, it would be great to know - I > could include mention of them while updating the howto/man/comment > Niklas mentioned. I think I'm hitting one of those problematic cases now trying to run one of the docs samples, but on windows. That is, this job file (targeted at a disk device): [fixed-rate-submit] size=128m rw=read ioengine=windowsaio iodepth=32 direct=1 # by setting the submit mode to offload, we can guarantee a fixed rate of # submission regardless of what the device completion rate is. io_submit_mode=offload rate_iops=1000 just spins forever, never performing any reads. Changing ioengine to sync (and deleting direct=1, necessary on windows) allows the job to run to completion.
