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=12259
  read : io=4,096MiB, bw=207MiB/s, iops=13,230, runt= 19814msec
    clat (usec): min=12, max=329, avg=17.53, stdev= 4.23
    bw (KiB/s) : min=    0, max=244032, per=97.39%, avg=206174.40, stdev=57281.59
  write: io=4,096MiB, bw=18,607KiB/s, iops=1,162, runt=225414msec
    clat (usec): min=16, max=356K, avg=651.65, stdev=7008.79
    bw (KiB/s) : min=    0, max=66163, per=102.45%, avg=19062.73, stdev=17658.45
  cpu          : usr=30.31%, sys=5.05%, ctx=16335, majf=0, 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=45.92%, 50=47.90%, 100=2.79%, 250=0.37%, 500=0.96%
     lat (usec): 750=0.08%, 1000=0.19%
     lat (msec): 2=0.90%, 4=0.22%, 10=0.18%, 20=0.12%, 50=0.16%
     lat (msec): 100=0.15%, 250=0.06%, 500=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=12482
  read : io=4,038MiB, bw=36,210KiB/s, iops=2,263, runt=114182msec
    clat (usec): min=2, max=1,163, avg=23.46, stdev=11.71
    bw (KiB/s) : min=    0, max=227104, per=220.23%, avg=79744.74, stdev=70586.71
  write: io=1,024MiB, bw=9,705KiB/s, iops=606, runt=108035msec
    clat (usec): min=2, max=4,090K, avg=1201.70, stdev=50345.22
    bw (KiB/s) : min=    0, max=49376, per=227.05%, avg=22035.22, stdev=21094.93
  cpu          : usr=10.82%, sys=2.48%, ctx=1489, majf=0, minf=1125068
  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=258413/65536, short=0/0
     lat (usec): 4=0.01%, 10=4.58%, 20=35.00%, 50=55.94%, 100=4.40%
     lat (usec): 250=0.04%, 500=0.01%
     lat (msec): 2=0.01%, 2000=0.01%, >=2000=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=207MiB/s, minb=207MiB/s, maxb=207MiB/s, mint=19814msec, maxt=19814msec
  WRITE: io=4,096MiB, aggrb=18,607KiB/s, minb=18,607KiB/s, maxb=18,607KiB/s, mint=225414msec, maxt=225414msec

Run status group 1 (all jobs):
   READ: io=4,038MiB, aggrb=36,210KiB/s, minb=36,210KiB/s, maxb=36,210KiB/s, mint=114182msec, maxt=114182msec
  WRITE: io=1,024MiB, aggrb=9,705KiB/s, minb=9,705KiB/s, maxb=9,705KiB/s, mint=108035msec, maxt=108035msec

Disk stats (read/write):
  sda: ios=18420/62579, merge=14376/1235937, ticks=247347/51559137, in_queue=51806445, util=92.36%
109.80user 70.11system 11:49.30elapsed 25%CPU (0avgtext+0avgdata 0maxresident)k
8390616inputs+18848000outputs (33major+3231148minor)pagefaults 0swaps