root@fio-test:~# fio --randrepeat=1 --ioengine=libaio --direct=1 --gtod_reduce=1 --name=test --filename=/dev/sdb --bs=4k --iodepth=32 --sync=1 --readwrite=randrw --rwmixread=75
test: (g=0): rw=randrw, bs=(R) 4096B-4096B, (W) 4096B-4096B, (T) 4096B-4096B, ioengine=libaio, iodepth=32
fio-3.16
Starting 1 process
Jobs: 1 (f=1): [m(1)][100.0%][r=9.90MiB/s,w=3439KiB/s][r=2534,w=859 IOPS][eta 00m:00s]
test: (groupid=0, jobs=1): err= 0: pid=2024: Fri Jun 11 07:18:34 2021
  read: IOPS=3037, BW=11.9MiB/s (12.4MB/s)(7678MiB/646965msec)
   bw (  KiB/s): min= 3088, max=32392, per=100.00%, avg=12153.81, stdev=4591.78, samples=1293
   iops        : min=  772, max= 8098, avg=3038.44, stdev=1147.94, samples=1293
  write: IOPS=1013, BW=4056KiB/s (4153kB/s)(2562MiB/646965msec); 0 zone resets
   bw (  KiB/s): min= 1016, max=10136, per=100.00%, avg=4056.48, stdev=1520.35, samples=1293
   iops        : min=  254, max= 2534, avg=1014.11, stdev=380.09, samples=1293
  cpu          : usr=1.94%, sys=5.95%, ctx=2051543, majf=0, minf=8
  IO depths    : 1=0.1%, 2=0.1%, 4=0.1%, 8=0.1%, 16=0.1%, 32=100.0%, >=64=0.0%
     submit    : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     complete  : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.1%, 64=0.0%, >=64=0.0%
     issued rwts: total=1965456,655984,0,0 short=0,0,0,0 dropped=0,0,0,0
     latency   : target=0, window=0, percentile=100.00%, depth=32

Run status group 0 (all jobs):
   READ: bw=11.9MiB/s (12.4MB/s), 11.9MiB/s-11.9MiB/s (12.4MB/s-12.4MB/s), io=7678MiB (8051MB), run=646965-646965msec
  WRITE: bw=4056KiB/s (4153kB/s), 4056KiB/s-4056KiB/s (4153kB/s-4153kB/s), io=2562MiB (2687MB), run=646965-646965msec

Disk stats (read/write):
  sdb: ios=1965273/655897, merge=0/0, ticks=1655299/18903482, in_queue=17712696, util=100.00%