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=27677
  read : io=4,096MiB, bw=231MiB/s, iops=14,770, runt= 17748msec
    clat (usec): min=11, max=138, avg=15.59, stdev= 2.49
    bw (KiB/s) : min=    0, max=246272, per=97.26%, avg=229870.22, stdev=39981.11
  write: io=4,096MiB, bw=19,885KiB/s, iops=1,242, runt=210926msec
    clat (usec): min=14, max=1,110K, avg=615.61, stdev=11188.71
    bw (KiB/s) : min=    0, max=83552, per=108.18%, avg=21510.80, stdev=23957.17
  cpu          : usr=29.53%, sys=3.78%, ctx=28702, majf=1, minf=2102311
  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=51.20%, 50=45.14%, 100=0.38%, 250=1.21%, 500=0.43%
     lat (usec): 750=0.27%, 1000=0.36%
     lat (msec): 2=0.50%, 4=0.09%, 10=0.12%, 20=0.10%, 50=0.07%
     lat (msec): 100=0.07%, 250=0.06%, 500=0.02%, 750=0.01%, 1000=0.01%
     lat (msec): 2000=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=27765
  read : io=4,037MiB, bw=153MiB/s, iops=9,792, runt= 26386msec
    clat (usec): min=2, max=466, avg=15.19, stdev= 4.38
    bw (KiB/s) : min=    0, max=244992, per=99.27%, avg=155527.65, stdev=46144.92
  write: io=1,024MiB, bw=47,017KiB/s, iops=2,938, runt= 22302msec
    clat (usec): min=2, max=793K, avg=32.33, stdev=3097.92
    bw (KiB/s) : min=    0, max=50720, per=98.95%, avg=46521.41, stdev=10377.43
  cpu          : usr=6.83%, sys=0.98%, ctx=12484, majf=0, minf=1114396
  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=258373/65536, short=0/0
     lat (usec): 4=0.01%, 10=6.16%, 20=75.84%, 50=17.94%, 100=0.05%
     lat (usec): 250=0.02%, 500=0.01%
     lat (msec): 1000=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=231MiB/s, minb=231MiB/s, maxb=231MiB/s, mint=17748msec, maxt=17748msec
  WRITE: io=4,096MiB, aggrb=19,885KiB/s, minb=19,885KiB/s, maxb=19,885KiB/s, mint=210926msec, maxt=210926msec

Run status group 1 (all jobs):
   READ: io=4,037MiB, aggrb=153MiB/s, minb=153MiB/s, maxb=153MiB/s, mint=26386msec, maxt=26386msec
  WRITE: io=1,024MiB, aggrb=47,017KiB/s, minb=47,017KiB/s, maxb=47,017KiB/s, mint=22302msec, maxt=22302msec

Disk stats (read/write):
  sda: ios=16769/63476, merge=672/1232798, ticks=253981/116720357, in_queue=116974227, util=92.93%
94.31user 53.81system 12:15.27elapsed 20%CPU (0avgtext+0avgdata 16861280maxresident)k
8390760inputs+18760088outputs (9major+3220618minor)pagefaults 0swaps