Hi Everyone, As mentioned in the readthedocs, thinktime, and thinktime_iotime can be used to simulate the IO phase followed by the idle phase of the workload. For example, --thinktime_iotime=1s --thinktime=9s repeat the 10-second cycle with IOs for 1 second and stall for 9 seconds. However, in my test for the first 10sec, fio keeps submitting without respecting thinktime and thinktime_iotime. After the first 10 seconds fio starts simulating mentioned IO phases according to parameters. Following is my fio script. [global] direct=1 runtime=20 time_based [job_1] rw=randread bs=4k rate_iops=1 numjobs=1 ioengine=libaio iodepth=1 offset=40G size=30G filename=/dev/nvme0n1p2 thinktime_iotime=1s thinktime=9s rate_ignore_thinktime=1 Results: Run status group 0 (all jobs): READ: bw=2457B/s (2457B/s), 2457B/s-2457B/s (2457B/s-2457B/s), io=48.0KiB (49.2kB), run=20001-20001msec >From the results, we can see that the total IO is 48KiB it should be ideally 8KiB. Is this a known issue? Thanks & Regards, Lokesh
