root@De-Vre-Prox13:~# fio --randrepeat=1 --ioengine=libaio --gtod_reduce=1 --name=test --filename=test --bs=4k --iodepth=64 --size=4G --readwrite=randrw --rwmixread=75readwrite=randrw --rwmix                               test: (g=0): rw=randrw, bs=(R) 4096B-4096B, (W) 4096B-4096B, (T) 4096B-4096B, ioengine=libaio, iodepth=64
fio-3.12
Starting 1 process
test: Laying out IO file (1 file / 4096MiB)
Jobs: 1 (f=1): [m(1)][100.0%][r=90.9MiB/s,w=29.9MiB/s][r=23.3k,w=7651 IOPS][eta 00m:00s]
test: (groupid=0, jobs=1): err= 0: pid=13608: Wed Oct  2 00:09:33 2019
  read: IOPS=19.6k, BW=76.6MiB/s (80.4MB/s)(3070MiB/40054msec)
   bw (  KiB/s): min=46360, max=166674, per=99.91%, avg=78412.75, stdev=23701.11, samples=80
   iops        : min=11590, max=41668, avg=19603.16, stdev=5925.26, samples=80
  write: IOPS=6557, BW=25.6MiB/s (26.9MB/s)(1026MiB/40054msec); 0 zone resets
   bw (  KiB/s): min=15664, max=55433, per=99.90%, avg=26204.94, stdev=7900.73, samples=80
   iops        : min= 3916, max=13858, avg=6551.20, stdev=1975.19, samples=80
  cpu          : usr=9.26%, sys=63.25%, ctx=105455, majf=6, minf=17
  IO depths    : 1=0.1%, 2=0.1%, 4=0.1%, 8=0.1%, 16=0.1%, 32=0.1%, >=64=100.0%
     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=0.0%, 64=0.1%, >=64=0.0%
     issued rwts: total=785920,262656,0,0 short=0,0,0,0 dropped=0,0,0,0
     latency   : target=0, window=0, percentile=100.00%, depth=64

Run status group 0 (all jobs):
   READ: bw=76.6MiB/s (80.4MB/s), 76.6MiB/s-76.6MiB/s (80.4MB/s-80.4MB/s), io=3070MiB (3219MB), run=40054-40054msec
  WRITE: bw=25.6MiB/s (26.9MB/s), 25.6MiB/s-25.6MiB/s (26.9MB/s-26.9MB/s), io=1026MiB (1076MB), run=40054-40054msec
root@De-Vre-Prox13:~# fio --randrepeat=1 --ioengine=libaio --gtod_reduce=1 --name=test --filename=test --bs=4k --iodepth=64 --size=4G --readwrite=randrw --rwmixread=75
test: (g=0): rw=randrw, bs=(R) 4096B-4096B, (W) 4096B-4096B, (T) 4096B-4096B, ioengine=libaio, iodepth=64
fio-3.12
Starting 1 process
Jobs: 1 (f=1): [m(1)][97.6%][r=74.2MiB/s,w=24.2MiB/s][r=18.0k,w=6200 IOPS][eta 00m:01s]
test: (groupid=0, jobs=1): err= 0: pid=19823: Wed Oct  2 00:10:17 2019
  read: IOPS=19.4k, BW=75.6MiB/s (79.3MB/s)(3070MiB/40601msec)
   bw (  KiB/s): min=42776, max=152192, per=99.86%, avg=77316.56, stdev=23263.26, samples=81
   iops        : min=10694, max=38046, avg=19329.12, stdev=5815.79, samples=81
  write: IOPS=6469, BW=25.3MiB/s (26.5MB/s)(1026MiB/40601msec); 0 zone resets
   bw (  KiB/s): min=14752, max=50912, per=99.86%, avg=25840.72, stdev=7709.96, samples=81
   iops        : min= 3688, max=12728, avg=6460.15, stdev=1927.49, samples=81
  cpu          : usr=8.47%, sys=66.67%, ctx=100614, majf=0, minf=145
  IO depths    : 1=0.1%, 2=0.1%, 4=0.1%, 8=0.1%, 16=0.1%, 32=0.1%, >=64=100.0%
     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=0.0%, 64=0.1%, >=64=0.0%
     issued rwts: total=785920,262656,0,0 short=0,0,0,0 dropped=0,0,0,0
     latency   : target=0, window=0, percentile=100.00%, depth=64

Run status group 0 (all jobs):
   READ: bw=75.6MiB/s (79.3MB/s), 75.6MiB/s-75.6MiB/s (79.3MB/s-79.3MB/s), io=3070MiB (3219MB), run=40601-40601msec
  WRITE: bw=25.3MiB/s (26.5MB/s), 25.3MiB/s-25.3MiB/s (26.5MB/s-26.5MB/s), io=1026MiB (1076MB), run=40601-40601msec
root@De-Vre-Prox13:~#