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=2360
  read : io=4,096MiB, bw=233MiB/s, iops=14,925, runt= 17563msec
    clat (usec): min=11, max=125, avg=14.78, stdev= 2.46
    bw (KiB/s) : min=    0, max=248736, per=97.24%, avg=232218.67, stdev=40470.11
  write: io=4,096MiB, bw=20,704KiB/s, iops=1,294, runt=202576msec
    clat (usec): min=14, max=1,023K, avg=574.09, stdev=9837.50
    bw (KiB/s) : min=    0, max=81056, per=105.81%, avg=21907.46, stdev=21667.26
  cpu          : usr=31.52%, sys=4.16%, ctx=47699, majf=1, minf=2102310
  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=50.80%, 50=45.38%, 100=0.56%, 250=1.25%, 500=0.57%
     lat (usec): 750=0.23%, 1000=0.30%
     lat (msec): 2=0.40%, 4=0.07%, 10=0.11%, 20=0.09%, 50=0.07%
     lat (msec): 100=0.07%, 250=0.07%, 500=0.01%, 750=0.01%, 1000=0.01%
     lat (msec): 2000=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=2622
  read : io=4,037MiB, bw=156MiB/s, iops=9,959, runt= 25944msec
    clat (usec): min=2, max=220, avg=14.93, stdev= 3.87
    bw (KiB/s) : min=    0, max=244192, per=98.80%, avg=157452.55, stdev=41520.29
  write: io=1,024MiB, bw=48,330KiB/s, iops=3,020, runt= 21696msec
    clat (usec): min=2, max=562K, avg=27.49, stdev=2194.73
    bw (KiB/s) : min=    0, max=52704, per=98.97%, avg=47835.51, stdev=8809.36
  cpu          : usr=6.78%, sys=0.90%, ctx=8270, majf=0, minf=1113985
  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=258393/65536, short=0/0
     lat (usec): 4=0.01%, 10=8.34%, 20=78.42%, 50=13.22%, 100=0.01%
     lat (usec): 250=0.01%
     lat (msec): 750=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=233MiB/s, minb=233MiB/s, maxb=233MiB/s, mint=17563msec, maxt=17563msec
  WRITE: io=4,096MiB, aggrb=20,704KiB/s, minb=20,704KiB/s, maxb=20,704KiB/s, mint=202576msec, maxt=202576msec

Run status group 1 (all jobs):
   READ: io=4,037MiB, aggrb=156MiB/s, minb=156MiB/s, maxb=156MiB/s, mint=25944msec, maxt=25944msec
  WRITE: io=1,024MiB, aggrb=48,331KiB/s, minb=48,331KiB/s, maxb=48,331KiB/s, mint=21696msec, maxt=21696msec

Disk stats (read/write):
  sda: ios=16730/63349, merge=711/1232997, ticks=236655/117845590, in_queue=118082128, util=92.85%
96.84user 48.96system 11:13.55elapsed 21%CPU (0avgtext+0avgdata 16861712maxresident)k
8390784inputs+18760744outputs (9major+3220174minor)pagefaults 0swaps