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=7845
  read : io=4,096MiB, bw=231MiB/s, iops=14,768, runt= 17750msec
    clat (usec): min=11, max=124, avg=15.60, stdev= 2.11
    bw (KiB/s) : min=    0, max=248384, per=97.25%, avg=229804.44, stdev=39773.42
  write: io=4,096MiB, bw=19,678KiB/s, iops=1,229, runt=213142msec
    clat (usec): min=13, max=1,269K, avg=621.28, stdev=11539.61
    bw (KiB/s) : min=    0, max=84480, per=110.55%, avg=21754.24, stdev=23407.41
  cpu          : usr=29.79%, sys=3.71%, ctx=37816, 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=52.47%, 50=43.98%, 100=0.27%, 250=1.27%, 500=0.37%
     lat (usec): 750=0.25%, 1000=0.34%
     lat (msec): 2=0.51%, 4=0.09%, 10=0.13%, 20=0.11%, 50=0.07%
     lat (msec): 100=0.07%, 250=0.06%, 500=0.02%, 750=0.01%, 1000=0.01%
     lat (msec): 2000=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=7924
  read : io=4,037MiB, bw=159MiB/s, iops=10,170, runt= 25404msec
    clat (usec): min=2, max=228, avg=15.76, stdev= 3.56
    bw (KiB/s) : min=    0, max=248704, per=97.80%, avg=159157.96, stdev=39887.58
  write: io=1,024MiB, bw=49,393KiB/s, iops=3,087, runt= 21229msec
    clat (usec): min=2, max=106, avg=20.41, stdev= 3.57
    bw (KiB/s) : min=    0, max=51392, per=97.70%, avg=48258.98, stdev=7709.52
  cpu          : usr=6.86%, sys=1.00%, ctx=14724, majf=0, minf=1114595
  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=258374/65536, short=0/0
     lat (usec): 4=0.01%, 10=3.20%, 20=75.86%, 50=20.92%, 100=0.01%
     lat (usec): 250=0.01%


Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=231MiB/s, minb=231MiB/s, maxb=231MiB/s, mint=17750msec, maxt=17750msec
  WRITE: io=4,096MiB, aggrb=19,678KiB/s, minb=19,678KiB/s, maxb=19,678KiB/s, mint=213142msec, maxt=213142msec

Run status group 1 (all jobs):
   READ: io=4,037MiB, aggrb=159MiB/s, minb=159MiB/s, maxb=159MiB/s, mint=25404msec, maxt=25404msec
  WRITE: io=1,024MiB, aggrb=49,394KiB/s, minb=49,394KiB/s, maxb=49,394KiB/s, mint=21229msec, maxt=21229msec

Disk stats (read/write):
  sda: ios=16751/64026, merge=689/1232258, ticks=254179/114776513, in_queue=115030612, util=92.81%
94.86user 58.84system 12:17.70elapsed 20%CPU (0avgtext+0avgdata 16861280maxresident)k
8390832inputs+18760280outputs (8major+3220801minor)pagefaults 0swaps