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=18698
  read : io=4,096MiB, bw=232MiB/s, iops=14,875, runt= 17623msec
    clat (usec): min=11, max=120, avg=15.07, stdev= 2.48
    bw (KiB/s) : min=    0, max=247648, per=97.25%, avg=231456.89, stdev=40307.58
  write: io=4,096MiB, bw=21,206KiB/s, iops=1,325, runt=197782msec
    clat (usec): min=15, max=903K, avg=556.56, stdev=9551.10
    bw (KiB/s) : min=    0, max=83168, per=105.52%, avg=22377.10, stdev=22173.94
  cpu          : usr=31.81%, sys=4.28%, ctx=69987, 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=51.06%, 50=45.35%, 100=0.33%, 250=1.30%, 500=0.46%
     lat (usec): 750=0.25%, 1000=0.32%
     lat (msec): 2=0.42%, 4=0.07%, 10=0.12%, 20=0.09%, 50=0.08%
     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=18954
  read : io=4,038MiB, bw=158MiB/s, iops=10,106, runt= 25573msec
    clat (usec): min=2, max=252, avg=14.98, stdev= 3.94
    bw (KiB/s) : min=    0, max=242912, per=97.84%, avg=158214.27, stdev=41621.40
  write: io=1,024MiB, bw=48,955KiB/s, iops=3,059, runt= 21419msec
    clat (usec): min=3, max=1,348, avg=19.70, stdev= 8.88
    bw (KiB/s) : min=    0, max=52576, per=97.56%, avg=47760.37, stdev=8454.81
  cpu          : usr=7.13%, sys=1.03%, ctx=26458, majf=0, minf=1114217
  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=258460/65536, short=0/0
     lat (usec): 4=0.01%, 10=7.01%, 20=78.14%, 50=14.81%, 100=0.02%
     lat (usec): 250=0.01%, 500=0.01%, 750=0.01%, 1000=0.01%
     lat (msec): 2=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=232MiB/s, minb=232MiB/s, maxb=232MiB/s, mint=17623msec, maxt=17623msec
  WRITE: io=4,096MiB, aggrb=21,206KiB/s, minb=21,206KiB/s, maxb=21,206KiB/s, mint=197782msec, maxt=197782msec

Run status group 1 (all jobs):
   READ: io=4,038MiB, aggrb=158MiB/s, minb=158MiB/s, maxb=158MiB/s, mint=25573msec, maxt=25573msec
  WRITE: io=1,024MiB, aggrb=48,955KiB/s, minb=48,955KiB/s, maxb=48,955KiB/s, mint=21419msec, maxt=21419msec

Disk stats (read/write):
  sda: ios=16720/69364, merge=721/1227201, ticks=226629/109074551, in_queue=109301067, util=92.59%
96.69user 48.86system 11:02.49elapsed 21%CPU (0avgtext+0avgdata 16861312maxresident)k
8390384inputs+18762504outputs (7major+3220332minor)pagefaults 0swaps