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=27294
  read : io=4,096MiB, bw=239MiB/s, iops=15,286, runt= 17149msec
    clat (usec): min=10, max=199, avg=13.07, stdev= 2.13
    bw (KiB/s) : min=    0, max=249824, per=97.13%, avg=237575.31, stdev=41568.53
  write: io=4,096MiB, bw=22,485KiB/s, iops=1,405, runt=186534msec
    clat (usec): min=13, max=892K, avg=614.58, stdev=8679.60
    bw (KiB/s) : min=    0, max=88416, per=103.92%, avg=23365.71, stdev=18022.31
  cpu          : usr=19.07%, sys=2.66%, ctx=25343, 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=92.83%, 50=3.77%, 100=0.29%, 250=0.14%, 500=0.13%
     lat (usec): 750=0.19%, 1000=0.20%
     lat (msec): 2=1.04%, 4=0.71%, 10=0.16%, 20=0.20%, 50=0.17%
     lat (msec): 100=0.10%, 250=0.04%, 500=0.01%, 750=0.01%, 1000=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=27513
  read : io=4,037MiB, bw=161MiB/s, iops=10,300, runt= 25086msec
    clat (usec): min=2, max=120, avg=12.89, stdev= 3.11
    bw (KiB/s) : min=    0, max=246912, per=99.64%, avg=164212.86, stdev=43239.22
  write: io=1,024MiB, bw=49,948KiB/s, iops=3,121, runt= 20993msec
    clat (usec): min=3, max=738K, avg=27.96, stdev=2880.80
    bw (KiB/s) : min=    0, max=53632, per=99.46%, avg=49679.66, stdev=9498.60
  cpu          : usr=6.48%, sys=0.69%, ctx=1196, majf=0, minf=1114268
  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=258399/65536, short=0/0
     lat (usec): 4=0.01%, 10=13.60%, 20=84.24%, 50=2.15%, 100=0.01%
     lat (usec): 250=0.01%
     lat (msec): 750=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=239MiB/s, minb=239MiB/s, maxb=239MiB/s, mint=17149msec, maxt=17149msec
  WRITE: io=4,096MiB, aggrb=22,485KiB/s, minb=22,485KiB/s, maxb=22,485KiB/s, mint=186534msec, maxt=186534msec

Run status group 1 (all jobs):
   READ: io=4,037MiB, aggrb=161MiB/s, minb=161MiB/s, maxb=161MiB/s, mint=25086msec, maxt=25086msec
  WRITE: io=1,024MiB, aggrb=49,950KiB/s, minb=49,950KiB/s, maxb=49,950KiB/s, mint=20993msec, maxt=20993msec

Disk stats (read/write):
  sda: ios=16908/61918, merge=534/1234460, ticks=230867/123343893, in_queue=123574697, util=93.22%
66.42user 31.51system 11:12.45elapsed 14%CPU (0avgtext+0avgdata 16861648maxresident)k
8390992inputs+18761168outputs (9major+3220448minor)pagefaults 0swaps