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=17063
  read : io=4,096MiB, bw=238MiB/s, iops=15,208, runt= 17237msec
    clat (usec): min=11, max=218, avg=12.97, stdev= 2.46
    bw (KiB/s) : min=    0, max=249920, per=97.21%, avg=236550.40, stdev=44825.60
  write: io=4,096MiB, bw=16,594KiB/s, iops=1,037, runt=252751msec
    clat (usec): min=12, max=370K, avg=741.59, stdev=7306.59
    bw (KiB/s) : min=    0, max=56736, per=101.86%, avg=16902.22, stdev=13216.57
  cpu          : usr=28.12%, sys=3.17%, ctx=17679, majf=0, minf=2102313
  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=55.37%, 50=41.03%, 100=0.20%, 250=0.65%, 500=0.25%
     lat (usec): 750=0.16%, 1000=0.16%
     lat (msec): 2=0.68%, 4=0.67%, 10=0.26%, 20=0.16%, 50=0.20%
     lat (msec): 100=0.17%, 250=0.06%, 500=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=17083
  read : io=4,036MiB, bw=36,447KiB/s, iops=2,277, runt=113404msec
    clat (usec): min=2, max=1,266, avg=19.80, stdev= 9.99
    bw (KiB/s) : min=    0, max=240448, per=222.46%, avg=81083.94, stdev=77821.78
  write: io=1,024MiB, bw=9,640KiB/s, iops=602, runt=108773msec
    clat (usec): min=3, max=2,896K, avg=1231.77, stdev=50280.08
    bw (KiB/s) : min=    0, max=50432, per=225.37%, avg=21725.85, stdev=21702.14
  cpu          : usr=10.00%, sys=1.64%, ctx=4007, majf=0, minf=1127447
  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=258334/65536, short=0/0
     lat (usec): 4=0.01%, 10=1.20%, 20=42.96%, 50=55.65%, 100=0.11%
     lat (usec): 250=0.05%, 500=0.02%, 750=0.01%, 1000=0.01%
     lat (msec): 2=0.01%, 250=0.01%, 500=0.01%, 750=0.01%, 1000=0.01%
     lat (msec): 2000=0.01%, >=2000=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=238MiB/s, minb=238MiB/s, maxb=238MiB/s, mint=17237msec, maxt=17237msec
  WRITE: io=4,096MiB, aggrb=16,594KiB/s, minb=16,594KiB/s, maxb=16,594KiB/s, mint=252751msec, maxt=252751msec

Run status group 1 (all jobs):
   READ: io=4,036MiB, aggrb=36,448KiB/s, minb=36,448KiB/s, maxb=36,448KiB/s, mint=113404msec, maxt=113404msec
  WRITE: io=1,024MiB, aggrb=9,640KiB/s, minb=9,640KiB/s, maxb=9,640KiB/s, mint=108773msec, maxt=108773msec

Disk stats (read/write):
  sda: ios=18412/62333, merge=14384/1235611, ticks=281344/52846200, in_queue=53127484, util=94.23%
109.46user 47.15system 12:00.96elapsed 21%CPU (0avgtext+0avgdata 0maxresident)k
8389576inputs+18871088outputs (27major+3233631minor)pagefaults 0swaps