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=17316
  read : io=4,096MiB, bw=235MiB/s, iops=15,039, runt= 17430msec
    clat (usec): min=11, max=398, avg=14.38, stdev= 2.16
    bw (KiB/s) : min=    0, max=248320, per=97.19%, avg=233885.26, stdev=41138.68
  write: io=4,096MiB, bw=19,001KiB/s, iops=1,187, runt=220740msec
    clat (usec): min=15, max=809K, avg=743.70, stdev=7734.23
    bw (KiB/s) : min=    0, max=66656, per=103.09%, avg=19588.96, stdev=17813.22
  cpu          : usr=18.26%, sys=2.55%, ctx=18712, 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=65.31%, 50=31.27%, 100=0.01%, 250=0.11%, 500=0.03%
     lat (usec): 750=0.09%, 1000=0.03%
     lat (msec): 2=1.01%, 4=1.37%, 10=0.26%, 20=0.13%, 50=0.15%
     lat (msec): 100=0.16%, 250=0.07%, 500=0.01%, 750=0.01%, 1000=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=17509
  read : io=4,040MiB, bw=37,874KiB/s, iops=2,367, runt=109216msec
    clat (usec): min=2, max=1,031, avg=16.77, stdev= 5.34
    bw (KiB/s) : min=    0, max=236608, per=238.69%, avg=90402.07, stdev=80164.73
  write: io=1,024MiB, bw=10,002KiB/s, iops=625, runt=104827msec
    clat (usec): min=2, max=3,592K, avg=1292.92, stdev=57274.26
    bw (KiB/s) : min=    0, max=51296, per=248.71%, avg=24876.24, stdev=22919.30
  cpu          : usr=7.38%, sys=1.37%, ctx=1830, majf=0, minf=1122012
  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=258528/65536, short=0/0
     lat (usec): 4=0.01%, 10=13.25%, 20=48.82%, 50=37.87%, 100=0.03%
     lat (usec): 250=0.01%, 500=0.01%, 750=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=235MiB/s, minb=235MiB/s, maxb=235MiB/s, mint=17430msec, maxt=17430msec
  WRITE: io=4,096MiB, aggrb=19,001KiB/s, minb=19,001KiB/s, maxb=19,001KiB/s, mint=220740msec, maxt=220740msec

Run status group 1 (all jobs):
   READ: io=4,040MiB, aggrb=37,874KiB/s, minb=37,874KiB/s, maxb=37,874KiB/s, mint=109216msec, maxt=109216msec
  WRITE: io=1,024MiB, aggrb=10,002KiB/s, minb=10,002KiB/s, maxb=10,002KiB/s, mint=104827msec, maxt=104827msec

Disk stats (read/write):
  sda: ios=18418/63081, merge=14378/1236448, ticks=253106/52546133, in_queue=52799226, util=93.90%
67.67user 34.48system 10:59.55elapsed 15%CPU (0avgtext+0avgdata 0maxresident)k
8390512inputs+18823872outputs (31major+3228076minor)pagefaults 0swaps