stresser: (g=0): rw=write, bs=16K-16K/16K-16K, ioengine=mmap, iodepth=1
fio: mixed read/write workload with verify. May not work as expected, unless you pre-populated the file
stresser: (g=1): rw=randrw, bs=16K-16K/16K-16K, ioengine=mmap, iodepth=4
Starting 2 processes
stresser: Laying out IO file(s) (1 file(s) / 4096MiB)

stresser: (groupid=0, jobs=1): err= 0: pid=22705
  read : io=4,096MiB, bw=188MiB/s, iops=12,032, runt= 21786msec
    clat (usec): min=12, max=624, avg=18.84, stdev= 6.72
    bw (KiB/s) : min=    0, max=242848, per=97.50%, avg=187722.18, stdev=61629.18
  write: io=4,096MiB, bw=17,622KiB/s, iops=1,101, runt=238006msec
    clat (usec): min=16, max=377K, avg=693.53, stdev=7282.53
    bw (KiB/s) : min=    0, max=57152, per=102.05%, avg=17983.82, stdev=15269.54
  cpu          : usr=29.82%, sys=4.96%, ctx=17433, majf=0, minf=2102312
  IO depths    : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=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=0.0%, 64=0.0%, >=64=0.0%
     issued r/w: total=262144/262144, short=0/0
     lat (usec): 20=42.75%, 50=51.42%, 100=2.42%, 250=0.13%, 500=0.87%
     lat (usec): 750=0.15%, 1000=0.16%
     lat (msec): 2=0.75%, 4=0.63%, 10=0.21%, 20=0.11%, 50=0.15%
     lat (msec): 100=0.14%, 250=0.08%, 500=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=22884
  read : io=4,038MiB, bw=35,475KiB/s, iops=2,217, runt=116553msec
    clat (usec): min=2, max=768, avg=23.28, stdev=11.53
    bw (KiB/s) : min=    0, max=230272, per=229.96%, avg=81576.58, stdev=73852.00
  write: io=1,024MiB, bw=9,401KiB/s, iops=587, runt=111533msec
    clat (usec): min=3, max=3,785K, avg=1252.87, stdev=53416.82
    bw (KiB/s) : min=    0, max=48352, per=237.93%, avg=22367.48, stdev=20728.46
  cpu          : usr=9.87%, sys=2.39%, ctx=18669, majf=0, minf=1127048
  IO depths    : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=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=0.0%, 64=0.0%, >=64=0.0%
     issued r/w: total=258425/65536, short=0/0
     lat (usec): 4=0.01%, 10=4.42%, 20=30.73%, 50=59.85%, 100=4.93%
     lat (usec): 250=0.04%, 500=0.01%, 750=0.01%, 1000=0.01%
     lat (msec): 250=0.01%, 2000=0.01%, >=2000=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=188MiB/s, minb=188MiB/s, maxb=188MiB/s, mint=21786msec, maxt=21786msec
  WRITE: io=4,096MiB, aggrb=17,622KiB/s, minb=17,622KiB/s, maxb=17,622KiB/s, mint=238006msec, maxt=238006msec

Run status group 1 (all jobs):
   READ: io=4,038MiB, aggrb=35,475KiB/s, minb=35,475KiB/s, maxb=35,475KiB/s, mint=116553msec, maxt=116553msec
  WRITE: io=1,024MiB, aggrb=9,401KiB/s, minb=9,401KiB/s, maxb=9,401KiB/s, mint=111533msec, maxt=111533msec

Disk stats (read/write):
  sda: ios=18392/63438, merge=14404/1235846, ticks=264297/54838255, in_queue=55102513, util=92.91%
112.07user 72.21system 11:42.96elapsed 26%CPU (0avgtext+0avgdata 0maxresident)k
8390592inputs+18867704outputs (33major+3233264minor)pagefaults 0swaps