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=30472
  read : io=4,096MiB, bw=237MiB/s, iops=15,154, runt= 17298msec
    clat (usec): min=10, max=230, avg=13.50, stdev= 2.57
    bw (KiB/s) : min=    0, max=248928, per=97.22%, avg=235726.63, stdev=41730.79
  write: io=4,096MiB, bw=20,443KiB/s, iops=1,277, runt=205165msec
    clat (usec): min=13, max=615K, avg=553.14, stdev=6500.54
    bw (KiB/s) : min=    0, max=82528, per=101.29%, avg=20707.12, stdev=13924.79
  cpu          : usr=31.26%, sys=4.42%, ctx=140631, majf=1, minf=2102342
  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=50.97%, 50=45.47%, 100=0.28%, 250=1.78%, 500=0.15%
     lat (usec): 750=0.10%, 1000=0.12%
     lat (msec): 2=0.19%, 4=0.12%, 10=0.28%, 20=0.20%, 50=0.17%
     lat (msec): 100=0.12%, 250=0.04%, 500=0.01%, 750=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=30584
  read : io=4,038MiB, bw=159MiB/s, iops=10,178, runt= 25389msec
    clat (usec): min=2, max=163, avg=14.97, stdev= 3.62
    bw (KiB/s) : min=    0, max=247200, per=97.86%, avg=159366.90, stdev=42556.13
  write: io=1,024MiB, bw=49,381KiB/s, iops=3,086, runt= 21234msec
    clat (usec): min=2, max=105, avg=19.29, stdev= 3.72
    bw (KiB/s) : min=    0, max=52736, per=97.67%, avg=48233.67, stdev=8602.17
  cpu          : usr=7.03%, sys=1.16%, ctx=30276, majf=0, minf=1114246
  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=258425/65536, short=0/0
     lat (usec): 4=0.01%, 10=4.94%, 20=80.36%, 50=14.69%, 100=0.01%
     lat (usec): 250=0.01%


Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=237MiB/s, minb=237MiB/s, maxb=237MiB/s, mint=17298msec, maxt=17298msec
  WRITE: io=4,096MiB, aggrb=20,443KiB/s, minb=20,443KiB/s, maxb=20,443KiB/s, mint=205165msec, maxt=205165msec

Run status group 1 (all jobs):
   READ: io=4,038MiB, aggrb=159MiB/s, minb=159MiB/s, maxb=159MiB/s, mint=25389msec, maxt=25389msec
  WRITE: io=1,024MiB, aggrb=49,383KiB/s, minb=49,383KiB/s, maxb=49,383KiB/s, mint=21234msec, maxt=21234msec

Disk stats (read/write):
  sda: ios=16663/62864, merge=777/1227594, ticks=247411/109781983, in_queue=110030511, util=93.27%
105.69user 45.52system 12:27.61elapsed 20%CPU (0avgtext+0avgdata 16861232maxresident)k
8390784inputs+18761448outputs (9major+3220553minor)pagefaults 0swaps