Hi, On Fri, 22 Feb 2019 at 16:19, Jing Booth <Jing.Booth@xxxxxxx> wrote: > > Hi all, > > In the test script shown below, it has [global] section and [nvme0n1] section. The test script is used to test a storage device. What queue depth does the storage device receive? Thanks > > fio --name=global --ba=16K --bs=16K --buffered=0 --ioengine=libaio --nice=-10 --rw=randrw --size=100% --status-interval=1 --ramp_time=2 --runtime=5 --time_based --rwmixread=25 --group_reporting --numjobs=4 --iodepth=16 --norandommap --random_generator=tausworthe64 --randrepeat=0 --percentile_list=99:99.9:99.99:99.999:99.9999:99.99999:99.999999:99.9999999 --name=nvme0n1 --filename=/dev/nvme0n1 --iodepth=64 Something like 4 if you count all jobs together (because numjobs is 4) but you can check for yourself by looking at the submit line in the IO depths output that fio produces. Did you see the warnings with the libaio engine in the manual/documentation (https://fio.readthedocs.io/en/latest/fio_doc.html#i-o-engine ) or the warning in the iodepth option section (https://fio.readthedocs.io/en/latest/fio_doc.html#cmdoption-arg-iodepth )? -- Sitsofe | http://sucs.org/~sits/
