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=31200
  read : io=4,096MiB, bw=215MiB/s, iops=13,779, runt= 19024msec
    clat (usec): min=12, max=286, avg=17.00, stdev= 3.97
    bw (KiB/s) : min=    0, max=243680, per=97.44%, avg=214842.26, stdev=51913.24
  write: io=4,096MiB, bw=18,834KiB/s, iops=1,177, runt=222687msec
    clat (usec): min=15, max=334K, avg=632.85, stdev=6877.46
    bw (KiB/s) : min=    0, max=65984, per=101.65%, avg=19144.92, stdev=16491.60
  cpu          : usr=31.22%, sys=5.41%, ctx=17396, majf=0, minf=2102321
  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=47.70%, 50=46.02%, 100=2.88%, 250=0.38%, 500=1.12%
     lat (usec): 750=0.09%, 1000=0.20%
     lat (msec): 2=0.74%, 4=0.21%, 10=0.17%, 20=0.13%, 50=0.14%
     lat (msec): 100=0.15%, 250=0.06%, 500=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=31431
  read : io=4,036MiB, bw=34,011KiB/s, iops=2,125, runt=121518msec
    clat (usec): min=2, max=1,662, avg=26.66, stdev=28.99
    bw (KiB/s) : min=    0, max=228544, per=225.78%, avg=76789.66, stdev=72692.73
  write: io=1,024MiB, bw=8,839KiB/s, iops=552, runt=118627msec
    clat (usec): min=3, max=3,059K, avg=1366.47, stdev=54624.11
    bw (KiB/s) : min=    0, max=49536, per=238.74%, avg=21102.05, stdev=21177.00
  cpu          : usr=9.68%, sys=2.82%, ctx=2318, majf=0, minf=1125319
  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=258311/65536, short=0/0
     lat (usec): 4=0.01%, 10=4.96%, 20=34.75%, 50=52.59%, 100=4.58%
     lat (usec): 250=3.08%, 500=0.02%, 750=0.01%, 1000=0.01%
     lat (msec): 2=0.01%, 250=0.01%, 2000=0.01%, >=2000=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=215MiB/s, minb=215MiB/s, maxb=215MiB/s, mint=19024msec, maxt=19024msec
  WRITE: io=4,096MiB, aggrb=18,835KiB/s, minb=18,835KiB/s, maxb=18,835KiB/s, mint=222687msec, maxt=222687msec

Run status group 1 (all jobs):
   READ: io=4,036MiB, aggrb=34,011KiB/s, minb=34,011KiB/s, maxb=34,011KiB/s, mint=121518msec, maxt=121518msec
  WRITE: io=1,024MiB, aggrb=8,839KiB/s, minb=8,839KiB/s, maxb=8,839KiB/s, mint=118627msec, maxt=118627msec

Disk stats (read/write):
  sda: ios=18411/62466, merge=14385/1235656, ticks=242038/54263775, in_queue=54505772, util=92.98%
108.89user 70.17system 11:18.43elapsed 26%CPU (0avgtext+0avgdata 0maxresident)k
8390528inputs+18842880outputs (33major+3231453minor)pagefaults 0swaps