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=27254
  read : io=4,096MiB, bw=242MiB/s, iops=15,501, runt= 16911msec
    clat (usec): min=10, max=216, avg=12.21, stdev= 2.24
    bw (KiB/s) : min=    0, max=250624, per=97.16%, avg=240978.82, stdev=42757.16
  write: io=4,096MiB, bw=18,392KiB/s, iops=1,149, runt=228039msec
    clat (usec): min=15, max=525K, avg=772.38, stdev=7922.40
    bw (KiB/s) : min=    0, max=66560, per=102.97%, avg=18938.29, stdev=19083.40
  cpu          : usr=17.96%, sys=2.26%, ctx=18323, 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=83.73%, 50=12.89%, 100=0.05%, 250=0.12%, 500=0.04%
     lat (usec): 750=0.01%, 1000=0.02%
     lat (msec): 2=0.99%, 4=1.48%, 10=0.17%, 20=0.11%, 50=0.14%
     lat (msec): 100=0.16%, 250=0.09%, 500=0.01%, 750=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=27468
  read : io=4,038MiB, bw=155MiB/s, iops=9,900, runt= 26103msec
    clat (usec): min=2, max=593, avg=16.76, stdev= 4.70
    bw (KiB/s) : min=    0, max=235456, per=98.10%, avg=155394.23, stdev=40685.15
  write: io=1,024MiB, bw=48,044KiB/s, iops=3,002, runt= 21825msec
    clat (usec): min=3, max=382K, avg=28.00, stdev=1493.94
    bw (KiB/s) : min=    0, max=50624, per=98.29%, avg=47222.02, stdev=8363.33
  cpu          : usr=7.70%, sys=1.16%, ctx=1571, majf=0, minf=1114793
  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=258420/65536, short=0/0
     lat (usec): 4=0.01%, 10=11.77%, 20=48.50%, 50=39.70%, 100=0.01%
     lat (usec): 250=0.01%, 500=0.01%, 750=0.01%
     lat (msec): 500=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=242MiB/s, minb=242MiB/s, maxb=242MiB/s, mint=16911msec, maxt=16911msec
  WRITE: io=4,096MiB, aggrb=18,392KiB/s, minb=18,392KiB/s, maxb=18,392KiB/s, mint=228039msec, maxt=228039msec

Run status group 1 (all jobs):
   READ: io=4,038MiB, aggrb=155MiB/s, minb=155MiB/s, maxb=155MiB/s, mint=26103msec, maxt=26103msec
  WRITE: io=1,024MiB, aggrb=48,046KiB/s, minb=48,046KiB/s, maxb=48,046KiB/s, mint=21825msec, maxt=21825msec

Disk stats (read/write):
  sda: ios=17443/62147, merge=0/1234250, ticks=247119/85870984, in_queue=86118088, util=92.58%
67.28user 29.34system 10:38.24elapsed 15%CPU (0avgtext+0avgdata 0maxresident)k
8390512inputs+18768608outputs (31major+3220805minor)pagefaults 0swaps