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=17091
  read : io=4,096MiB, bw=237MiB/s, iops=15,147, runt= 17306msec
    clat (usec): min=11, max=942, avg=12.92, stdev= 3.04
    bw (KiB/s) : min=    0, max=250208, per=97.22%, avg=235634.29, stdev=47857.73
  write: io=4,096MiB, bw=18,554KiB/s, iops=1,159, runt=226058msec
    clat (usec): min=12, max=1,123K, avg=656.01, stdev=7896.78
    bw (KiB/s) : min=    0, max=66816, per=103.25%, avg=19156.85, stdev=18245.47
  cpu          : usr=29.56%, sys=3.42%, ctx=17101, 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=59.44%, 50=36.92%, 100=0.29%, 250=0.99%, 500=0.23%
     lat (usec): 750=0.09%, 1000=0.19%
     lat (msec): 2=0.93%, 4=0.25%, 10=0.20%, 20=0.11%, 50=0.16%
     lat (msec): 100=0.14%, 250=0.06%, 500=0.01%, 750=0.01%, 2000=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=17108
  read : io=4,037MiB, bw=43,190KiB/s, iops=2,699, runt= 95720msec
    clat (usec): min=2, max=3,053, avg=19.46, stdev=11.58
    bw (KiB/s) : min=    0, max=242016, per=205.98%, avg=88962.90, stdev=78004.87
  write: io=1,024MiB, bw=11,532KiB/s, iops=720, runt= 90925msec
    clat (usec): min=2, max=3,377K, avg=971.02, stdev=43504.92
    bw (KiB/s) : min=    0, max=50720, per=214.18%, avg=24698.93, stdev=22104.23
  cpu          : usr=10.73%, sys=1.72%, ctx=7469, majf=0, minf=1127415
  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=258388/65536, short=0/0
     lat (usec): 4=0.01%, 10=1.23%, 20=47.31%, 50=51.28%, 100=0.10%
     lat (usec): 250=0.05%, 500=0.01%, 750=0.01%, 1000=0.01%
     lat (msec): 2=0.01%, 4=0.01%, 100=0.01%, 750=0.01%, 2000=0.01%
     lat (msec): >=2000=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=237MiB/s, minb=237MiB/s, maxb=237MiB/s, mint=17306msec, maxt=17306msec
  WRITE: io=4,096MiB, aggrb=18,554KiB/s, minb=18,554KiB/s, maxb=18,554KiB/s, mint=226058msec, maxt=226058msec

Run status group 1 (all jobs):
   READ: io=4,037MiB, aggrb=43,190KiB/s, minb=43,190KiB/s, maxb=43,190KiB/s, mint=95720msec, maxt=95720msec
  WRITE: io=1,024MiB, aggrb=11,532KiB/s, minb=11,532KiB/s, maxb=11,532KiB/s, mint=90925msec, maxt=90925msec

Disk stats (read/write):
  sda: ios=18432/62327, merge=14363/1236065, ticks=252176/49252704, in_queue=49504836, util=94.44%
104.73user 46.11system 10:40.35elapsed 23%CPU (0avgtext+0avgdata 0maxresident)k
8389552inputs+18865808outputs (27major+3233380minor)pagefaults 0swaps