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=4183
  read : io=4,096MiB, bw=205MiB/s, iops=13,107, runt= 20000msec
    clat (usec): min=12, max=3,072, avg=18.02, stdev=10.00
    bw (KiB/s) : min=    0, max=242272, per=97.32%, avg=204088.00, stdev=57030.76
  write: io=4,096MiB, bw=18,713KiB/s, iops=1,169, runt=224128msec
    clat (usec): min=15, max=582K, avg=643.66, stdev=7207.88
    bw (KiB/s) : min=    0, max=66400, per=102.76%, avg=19228.63, stdev=17528.44
  cpu          : usr=30.53%, sys=5.42%, ctx=16018, majf=0, minf=2102312
  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=45.68%, 50=48.14%, 100=2.80%, 250=0.35%, 500=1.09%
     lat (usec): 750=0.08%, 1000=0.15%
     lat (msec): 2=0.83%, 4=0.23%, 10=0.16%, 20=0.12%, 50=0.15%
     lat (msec): 100=0.14%, 250=0.07%, 500=0.01%, 750=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=4476
  read : io=4,038MiB, bw=35,287KiB/s, iops=2,205, runt=117186msec
    clat (usec): min=2, max=1,212, avg=25.01, stdev=12.58
    bw (KiB/s) : min=    0, max=229024, per=221.28%, avg=78081.31, stdev=69175.77
  write: io=1,024MiB, bw=9,405KiB/s, iops=587, runt=111483msec
    clat (usec): min=2, max=3,554K, avg=1239.30, stdev=53111.48
    bw (KiB/s) : min=    0, max=48320, per=233.59%, avg=21969.37, stdev=19818.54
  cpu          : usr=10.86%, sys=2.64%, ctx=1776, majf=0, minf=1125523
  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=258450/65536, short=0/0
     lat (usec): 4=0.01%, 10=2.71%, 20=27.57%, 50=61.94%, 100=7.69%
     lat (usec): 250=0.07%, 500=0.01%, 750=0.01%, 1000=0.01%
     lat (msec): 2=0.01%, 4=0.01%, 50=0.01%, 2000=0.01%, >=2000=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=205MiB/s, minb=205MiB/s, maxb=205MiB/s, mint=20000msec, maxt=20000msec
  WRITE: io=4,096MiB, aggrb=18,713KiB/s, minb=18,713KiB/s, maxb=18,713KiB/s, mint=224128msec, maxt=224128msec

Run status group 1 (all jobs):
   READ: io=4,038MiB, aggrb=35,287KiB/s, minb=35,287KiB/s, maxb=35,287KiB/s, mint=117186msec, maxt=117186msec
  WRITE: io=1,024MiB, aggrb=9,405KiB/s, minb=9,405KiB/s, maxb=9,405KiB/s, mint=111483msec, maxt=111483msec

Disk stats (read/write):
  sda: ios=18406/62327, merge=14390/1236037, ticks=244590/52672432, in_queue=52916972, util=92.43%
110.71user 72.04system 11:52.81elapsed 25%CPU (0avgtext+0avgdata 0maxresident)k
8390400inputs+18855480outputs (32major+3231610minor)pagefaults 0swaps