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=19405
  read : io=4,096MiB, bw=240MiB/s, iops=15,333, runt= 17096msec
    clat (usec): min=11, max=168, avg=12.91, stdev= 1.97
    bw (KiB/s) : min=    0, max=247776, per=97.18%, avg=238418.29, stdev=41721.94
  write: io=4,096MiB, bw=21,152KiB/s, iops=1,322, runt=198286msec
    clat (usec): min=14, max=841K, avg=558.63, stdev=9621.48
    bw (KiB/s) : min=    0, max=81920, per=105.95%, avg=22409.65, stdev=21626.98
  cpu          : usr=31.59%, sys=3.96%, ctx=36381, majf=1, minf=2102309
  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=52.58%, 50=44.05%, 100=0.11%, 250=1.40%, 500=0.37%
     lat (usec): 750=0.23%, 1000=0.30%
     lat (msec): 2=0.42%, 4=0.09%, 10=0.12%, 20=0.09%, 50=0.07%
     lat (msec): 100=0.08%, 250=0.06%, 500=0.01%, 750=0.01%, 1000=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=19507
  read : io=4,039MiB, bw=156MiB/s, iops=9,983, runt= 25894msec
    clat (usec): min=2, max=914, avg=14.58, stdev= 4.00
    bw (KiB/s) : min=    0, max=244288, per=99.50%, avg=158929.14, stdev=42109.02
  write: io=1,024MiB, bw=48,210KiB/s, iops=3,013, runt= 21750msec
    clat (usec): min=4, max=749K, avg=30.33, stdev=2925.87
    bw (KiB/s) : min=    0, max=53792, per=99.25%, avg=47846.86, stdev=9350.73
  cpu          : usr=6.65%, sys=0.84%, ctx=1733, majf=0, minf=1115799
  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=258502/65536, short=0/0
     lat (usec): 4=0.01%, 10=7.23%, 20=82.67%, 50=10.06%, 100=0.02%
     lat (usec): 250=0.01%, 750=0.01%, 1000=0.01%
     lat (msec): 750=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=240MiB/s, minb=240MiB/s, maxb=240MiB/s, mint=17096msec, maxt=17096msec
  WRITE: io=4,096MiB, aggrb=21,152KiB/s, minb=21,152KiB/s, maxb=21,152KiB/s, mint=198286msec, maxt=198286msec

Run status group 1 (all jobs):
   READ: io=4,039MiB, aggrb=156MiB/s, minb=156MiB/s, maxb=156MiB/s, mint=25894msec, maxt=25894msec
  WRITE: io=1,024MiB, aggrb=48,210KiB/s, minb=48,210KiB/s, maxb=48,210KiB/s, mint=21750msec, maxt=21750msec

Disk stats (read/write):
  sda: ios=16726/62757, merge=715/1234061, ticks=226570/121022123, in_queue=121248583, util=93.04%
95.65user 48.13system 11:19.46elapsed 21%CPU (0avgtext+0avgdata 16861728maxresident)k
8390656inputs+18764624outputs (8major+3221993minor)pagefaults 0swaps