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=2082
  read : io=4,096MiB, bw=235MiB/s, iops=15,057, runt= 17410msec
    clat (usec): min=11, max=180, avg=14.27, stdev= 2.33
    bw (KiB/s) : min=    0, max=248544, per=97.19%, avg=234156.80, stdev=41114.79
  write: io=4,096MiB, bw=23,373KiB/s, iops=1,460, runt=179444msec
    clat (usec): min=15, max=1,249K, avg=586.92, stdev=7194.62
    bw (KiB/s) : min=    0, max=87520, per=101.92%, avg=23821.51, stdev=16382.66
  cpu          : usr=20.03%, sys=3.09%, ctx=17818, majf=1, minf=2108539
  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=63.83%, 50=32.79%, 100=0.09%, 250=0.30%, 500=0.14%
     lat (usec): 750=0.17%, 1000=0.20%
     lat (msec): 2=1.15%, 4=0.78%, 10=0.12%, 20=0.14%, 50=0.12%
     lat (msec): 100=0.12%, 250=0.05%, 500=0.01%, 750=0.01%, 2000=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=2291
  read : io=4,038MiB, bw=162MiB/s, iops=10,385, runt= 24886msec
    clat (usec): min=2, max=162, avg=13.23, stdev= 3.40
    bw (KiB/s) : min=    0, max=247424, per=97.82%, avg=162545.22, stdev=41060.10
  write: io=1,024MiB, bw=50,655KiB/s, iops=3,165, runt= 20700msec
    clat (usec): min=3, max=170K, avg=20.39, stdev=662.42
    bw (KiB/s) : min=    0, max=52928, per=97.74%, avg=49512.86, stdev=8213.50
  cpu          : usr=7.16%, sys=0.86%, ctx=1735, majf=0, minf=1115950
  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=258461/65536, short=0/0
     lat (usec): 4=0.01%, 10=13.58%, 20=80.97%, 50=5.41%, 100=0.02%
     lat (usec): 250=0.01%
     lat (msec): 250=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=235MiB/s, minb=235MiB/s, maxb=235MiB/s, mint=17410msec, maxt=17410msec
  WRITE: io=4,096MiB, aggrb=23,373KiB/s, minb=23,373KiB/s, maxb=23,373KiB/s, mint=179444msec, maxt=179444msec

Run status group 1 (all jobs):
   READ: io=4,038MiB, aggrb=162MiB/s, minb=162MiB/s, maxb=162MiB/s, mint=24886msec, maxt=24886msec
  WRITE: io=1,024MiB, aggrb=50,657KiB/s, minb=50,657KiB/s, maxb=50,657KiB/s, mint=20700msec, maxt=20700msec

Disk stats (read/write):
  sda: ios=17063/61971, merge=378/1234550, ticks=284625/97506499, in_queue=97791069, util=92.56%
67.41user 32.58system 10:44.46elapsed 15%CPU (0avgtext+0avgdata 0maxresident)k
8390808inputs+18829024outputs (8major+3228207minor)pagefaults 0swaps