io_uring latencies are reporting much higher on QD1
Using FIO to run some tests on the latest ioengine.
io_uring QD1 workload's iops/BW are reporting consistently higher than IOENGINE QD1 pvsync2
However, the io_uring QD1 latencies from 1-100 percentile values are significantly off (It is reporting up in the 10's of 1000's of % higher) from what the other ioengines are reporting.
Below is an example of the ini file I am specifically running.
I am running my tests on the latest kernel (5.1.0-el7.elrepo.x86_64) and this build of FIO (3.13-41-g2857-dirty)
Is there a significant difference in the way latency/percentiles are reported relative to iops in the new ioengine?
Or is this a kernel specific issue?