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=25391
  read : io=4,096MiB, bw=233MiB/s, iops=14,917, runt= 17573msec
    clat (usec): min=10, max=121, avg=14.92, stdev= 2.28
    bw (KiB/s) : min=    0, max=250016, per=97.24%, avg=232101.33, stdev=40205.36
  write: io=4,096MiB, bw=19,255KiB/s, iops=1,203, runt=217819msec
    clat (usec): min=14, max=774K, avg=633.58, stdev=11677.64
    bw (KiB/s) : min=    0, max=86866, per=109.25%, avg=21035.81, stdev=23266.72
  cpu          : usr=29.92%, sys=3.56%, ctx=41431, majf=1, minf=2102310
  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=53.22%, 50=43.25%, 100=0.29%, 250=1.46%, 500=0.31%
     lat (usec): 750=0.22%, 1000=0.28%
     lat (msec): 2=0.46%, 4=0.08%, 10=0.12%, 20=0.10%, 50=0.06%
     lat (msec): 100=0.06%, 250=0.06%, 500=0.02%, 750=0.01%, 1000=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=25471
  read : io=4,038MiB, bw=147MiB/s, iops=9,386, runt= 27532msec
    clat (usec): min=2, max=220, avg=15.08, stdev= 4.39
    bw (KiB/s) : min=    0, max=241792, per=99.33%, avg=149190.61, stdev=48727.32
  write: io=1,024MiB, bw=44,870KiB/s, iops=2,804, runt= 23369msec
    clat (usec): min=3, max=746K, avg=31.45, stdev=2913.08
    bw (KiB/s) : min=    0, max=52768, per=99.27%, avg=44545.24, stdev=11660.86
  cpu          : usr=6.92%, sys=0.95%, ctx=14802, majf=0, minf=1114167
  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=258435/65536, short=0/0
     lat (usec): 4=0.01%, 10=9.21%, 20=75.72%, 50=15.04%, 100=0.02%
     lat (usec): 250=0.01%
     lat (msec): 750=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=233MiB/s, minb=233MiB/s, maxb=233MiB/s, mint=17573msec, maxt=17573msec
  WRITE: io=4,096MiB, aggrb=19,255KiB/s, minb=19,255KiB/s, maxb=19,255KiB/s, mint=217819msec, maxt=217819msec

Run status group 1 (all jobs):
   READ: io=4,038MiB, aggrb=147MiB/s, minb=147MiB/s, maxb=147MiB/s, mint=27532msec, maxt=27532msec
  WRITE: io=1,024MiB, aggrb=44,871KiB/s, minb=44,871KiB/s, maxb=44,871KiB/s, mint=23369msec, maxt=23369msec

Disk stats (read/write):
  sda: ios=16791/64265, merge=651/1232313, ticks=261599/117879243, in_queue=118140736, util=92.91%
97.65user 57.90system 12:32.13elapsed 20%CPU (0avgtext+0avgdata 16861296maxresident)k
8390608inputs+18762328outputs (8major+3220456minor)pagefaults 0swaps