XFS, 4 NVMe striped devices, stripe size 64k, hyperthreading disabled

I/O througput on XFS. We see that there is quite an overhead, it doesn't reach
the levels in fio-striped.txt.

QAT has lower througput than AES-NI, but it also has very low CPU consumption
when reading - this is the only dm-crypt test where QAT provides some benefit!

fio --ioengine=psync --iodepth=1 --rw=randread --direct=0 --end_fsync=1 --bs=64k --numjobs=56 --time_based --runtime=10 --group_reporting --name=job --filename=/mnt/test/file
fio --ioengine=psync --iodepth=1 --rw=randwrite --direct=0 --end_fsync=1 --bs=64k --numjobs=56 --time_based --runtime=10 --group_reporting --name=job --filename=/mnt/test/file

raw device:
READ: bw=3672MiB/s
busy: 45.963518%
idle: 53.343391%
irq:  0.436703%

WRITE: bw=2966MiB/s
busy: 57.770084%
idle: 28.695388%
irq:  0.983228%

dm-crypt, 4096, aes-ni
READ: bw=2956MiB/s
busy: 60.790450%
idle: 38.079135%
irq:  0.660701%

WRITE: bw=3156MiB/s
busy: 59.604016%
idle: 35.336383%
irq:  0.815776%

dm-crypt, 4096, qat
READ: bw=1678MiB/s
busy: 4.079595%
idle: 92.481173%
irq:  1.898289%

WRITE: bw=1805MiB/s
busy: 29.078186%
idle: 62.963860%
irq:  2.034750%