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=404
  read : io=4,096MiB, bw=231MiB/s, iops=14,767, runt= 17751msec
    clat (usec): min=11, max=233, avg=15.46, stdev= 2.41
    bw (KiB/s) : min=    0, max=245984, per=97.26%, avg=229815.11, stdev=39944.73
  write: io=4,096MiB, bw=20,377KiB/s, iops=1,273, runt=205829msec
    clat (usec): min=15, max=811K, avg=555.20, stdev=7933.41
    bw (KiB/s) : min=    0, max=78656, per=103.64%, avg=21117.71, stdev=16261.92
  cpu          : usr=32.73%, sys=4.90%, ctx=20300, 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=49.42%, 50=46.32%, 100=0.92%, 250=1.62%, 500=0.30%
     lat (usec): 750=0.11%, 1000=0.14%
     lat (msec): 2=0.20%, 4=0.13%, 10=0.30%, 20=0.23%, 50=0.18%
     lat (msec): 100=0.08%, 250=0.04%, 500=0.01%, 750=0.01%, 1000=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=527
  read : io=4,037MiB, bw=157MiB/s, iops=10,071, runt= 25656msec
    clat (usec): min=2, max=145, avg=15.10, stdev= 3.70
    bw (KiB/s) : min=    0, max=245216, per=98.01%, avg=157943.39, stdev=43069.58
  write: io=1,024MiB, bw=48,891KiB/s, iops=3,055, runt= 21447msec
    clat (usec): min=2, max=383K, avg=25.50, stdev=1497.15
    bw (KiB/s) : min=    0, max=51744, per=97.99%, avg=47908.26, stdev=9009.30
  cpu          : usr=6.57%, sys=0.84%, ctx=997, majf=0, minf=1113739
  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=258398/65536, short=0/0
     lat (usec): 4=0.01%, 10=5.29%, 20=77.93%, 50=16.76%, 100=0.01%
     lat (usec): 250=0.01%
     lat (msec): 500=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=231MiB/s, minb=231MiB/s, maxb=231MiB/s, mint=17751msec, maxt=17751msec
  WRITE: io=4,096MiB, aggrb=20,377KiB/s, minb=20,377KiB/s, maxb=20,377KiB/s, mint=205829msec, maxt=205829msec

Run status group 1 (all jobs):
   READ: io=4,037MiB, aggrb=157MiB/s, minb=157MiB/s, maxb=157MiB/s, mint=25656msec, maxt=25656msec
  WRITE: io=1,024MiB, aggrb=48,893KiB/s, minb=48,893KiB/s, maxb=48,893KiB/s, mint=21447msec, maxt=21447msec

Disk stats (read/write):
  sda: ios=17217/61525, merge=224/1234865, ticks=233761/127366714, in_queue=127600358, util=93.28%
105.18user 53.20system 11:39.47elapsed 22%CPU (0avgtext+0avgdata 16861728maxresident)k
8390784inputs+18761112outputs (9major+3220031minor)pagefaults 0swaps