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=12664
  read : io=4,096MiB, bw=240MiB/s, iops=15,335, runt= 17094msec
    clat (usec): min=11, max=141, avg=12.89, stdev= 2.12
    bw (KiB/s) : min=    0, max=248512, per=97.18%, avg=238460.34, stdev=41888.04
  write: io=4,096MiB, bw=19,343KiB/s, iops=1,208, runt=216828msec
    clat (usec): min=14, max=987K, avg=625.34, stdev=11116.72
    bw (KiB/s) : min=    0, max=85024, per=107.78%, avg=20847.89, stdev=21790.74
  cpu          : usr=30.17%, sys=3.76%, ctx=36278, 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=52.63%, 50=43.70%, 100=0.41%, 250=1.42%, 500=0.34%
     lat (usec): 750=0.20%, 1000=0.26%
     lat (msec): 2=0.47%, 4=0.11%, 10=0.14%, 20=0.11%, 50=0.07%
     lat (msec): 100=0.07%, 250=0.06%, 500=0.02%, 750=0.01%, 1000=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=12738
  read : io=4,037MiB, bw=157MiB/s, iops=10,060, runt= 25679msec
    clat (usec): min=2, max=534, avg=13.39, stdev= 4.15
    bw (KiB/s) : min=    0, max=244960, per=98.94%, avg=159266.06, stdev=44132.47
  write: io=1,024MiB, bw=48,973KiB/s, iops=3,060, runt= 21411msec
    clat (usec): min=2, max=740K, avg=28.87, stdev=2891.90
    bw (KiB/s) : min=    0, max=53280, per=98.98%, avg=48475.07, stdev=10069.78
  cpu          : usr=6.88%, sys=0.96%, ctx=7985, majf=0, minf=1114015
  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=258346/65536, short=0/0
     lat (usec): 4=0.01%, 10=12.04%, 20=82.68%, 50=5.23%, 100=0.03%
     lat (usec): 250=0.01%, 500=0.01%, 750=0.01%
     lat (msec): 750=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=240MiB/s, minb=240MiB/s, maxb=240MiB/s, mint=17094msec, maxt=17094msec
  WRITE: io=4,096MiB, aggrb=19,343KiB/s, minb=19,343KiB/s, maxb=19,343KiB/s, mint=216828msec, maxt=216828msec

Run status group 1 (all jobs):
   READ: io=4,037MiB, aggrb=157MiB/s, minb=157MiB/s, maxb=157MiB/s, mint=25679msec, maxt=25679msec
  WRITE: io=1,024MiB, aggrb=48,975KiB/s, minb=48,975KiB/s, maxb=48,975KiB/s, mint=21411msec, maxt=21411msec

Disk stats (read/write):
  sda: ios=16731/63882, merge=710/1232286, ticks=259217/114239033, in_queue=114498162, util=92.73%
96.50user 51.28system 12:07.29elapsed 20%CPU (0avgtext+0avgdata 16861280maxresident)k
8390784inputs+18759192outputs (9major+3220200minor)pagefaults 0swaps