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=29882
  read : io=4,096MiB, bw=241MiB/s, iops=15,443, runt= 16974msec
    clat (usec): min=10, max=136, avg=12.49, stdev= 1.82
    bw (KiB/s) : min=    0, max=249568, per=97.21%, avg=240217.41, stdev=42660.44
  write: io=4,096MiB, bw=20,677KiB/s, iops=1,292, runt=202847msec
    clat (usec): min=13, max=465K, avg=542.26, stdev=5948.42
    bw (KiB/s) : min=    0, max=79328, per=100.98%, avg=20879.09, stdev=13861.16
  cpu          : usr=31.65%, sys=4.22%, ctx=123508, majf=1, minf=2102341
  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=51.32%, 50=45.11%, 100=0.29%, 250=1.82%, 500=0.12%
     lat (usec): 750=0.10%, 1000=0.14%
     lat (msec): 2=0.19%, 4=0.12%, 10=0.26%, 20=0.19%, 50=0.18%
     lat (msec): 100=0.12%, 250=0.04%, 500=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=30001
  read : io=4,038MiB, bw=158MiB/s, iops=10,116, runt= 25545msec
    clat (usec): min=2, max=231, avg=15.41, stdev= 3.63
    bw (KiB/s) : min=    0, max=247520, per=98.04%, avg=158675.69, stdev=43209.49
  write: io=1,024MiB, bw=48,755KiB/s, iops=3,047, runt= 21507msec
    clat (usec): min=3, max=94,050, avg=21.74, stdev=367.32
    bw (KiB/s) : min=    0, max=51616, per=97.63%, avg=47601.07, stdev=7966.06
  cpu          : usr=7.19%, sys=1.17%, ctx=23636, majf=0, minf=1114817
  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=258414/65536, short=0/0
     lat (usec): 4=0.01%, 10=1.77%, 20=77.20%, 50=21.01%, 100=0.01%
     lat (usec): 250=0.01%
     lat (msec): 100=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=241MiB/s, minb=241MiB/s, maxb=241MiB/s, mint=16974msec, maxt=16974msec
  WRITE: io=4,096MiB, aggrb=20,677KiB/s, minb=20,677KiB/s, maxb=20,677KiB/s, mint=202847msec, maxt=202847msec

Run status group 1 (all jobs):
   READ: io=4,038MiB, aggrb=158MiB/s, minb=158MiB/s, maxb=158MiB/s, mint=25545msec, maxt=25545msec
  WRITE: io=1,024MiB, aggrb=48,755KiB/s, minb=48,755KiB/s, maxb=48,755KiB/s, mint=21507msec, maxt=21507msec

Disk stats (read/write):
  sda: ios=16657/62962, merge=782/1227224, ticks=243966/108555587, in_queue=108800449, util=93.25%
105.74user 43.96system 12:18.87elapsed 20%CPU (0avgtext+0avgdata 16861104maxresident)k
8390744inputs+18761240outputs (9major+3221076minor)pagefaults 0swaps