Hello, I am running the following fio profile on an RDMA storage stack with a raid5 in the back end, and I see a CPU lockup. (I can provide more details about the setup if needed). "" [global] description=Emulation of Storage Server Access Pattern bssplit=512/20:1k/16:2k/9:4k/12:8k/19:16k/10:32k/8:64k/4 fadvise_hint=0 rw=randrw direct=1 random_distribution=zipf:1.2 time_based=1 runtime=60 ramp_time=1 ioengine=libaio iodepth=128 iodepth_batch_submit=128 iodepth_batch_complete_min=1 iodepth_batch_complete_max=128 numjobs=1 group_reporting [job1] filename=/dev/rnbd0 "" First question I have is, is there wrong with the above profile? Next, if I simply change the iodepth_batch_complete_min=0 in the above profile, I see no hangup. My next step is to reach out to the kernel raid group, but before that I wanted to confirm that the fio profile leading to the hangup isn't incorrect/illegal or something. Regards -Haris
