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=30286
  read : io=4,096MiB, bw=241MiB/s, iops=15,435, runt= 16983msec
    clat (usec): min=10, max=115, avg=12.52, stdev= 1.69
    bw (KiB/s) : min=    0, max=250304, per=97.04%, avg=239675.29, stdev=42535.57
  write: io=4,096MiB, bw=22,367KiB/s, iops=1,397, runt=187518msec
    clat (usec): min=13, max=939K, avg=619.35, stdev=8993.16
    bw (KiB/s) : min=    0, max=88704, per=104.50%, avg=23372.97, stdev=18246.05
  cpu          : usr=19.09%, sys=2.52%, ctx=31389, 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=90.60%, 50=6.02%, 100=0.25%, 250=0.17%, 500=0.13%
     lat (usec): 750=0.19%, 1000=0.22%
     lat (msec): 2=1.03%, 4=0.74%, 10=0.15%, 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=30466
  read : io=4,039MiB, bw=161MiB/s, iops=10,318, runt= 25051msec
    clat (usec): min=2, max=109, avg=12.72, stdev= 3.07
    bw (KiB/s) : min=    0, max=249920, per=98.83%, avg=163168.80, stdev=45396.39
  write: io=1,024MiB, bw=50,094KiB/s, iops=3,130, runt= 20932msec
    clat (usec): min=2, max=692K, avg=27.17, stdev=2704.32
    bw (KiB/s) : min=    0, max=54208, per=98.86%, avg=49525.57, stdev=10553.06
  cpu          : usr=6.35%, sys=0.64%, ctx=2287, majf=0, minf=1114584
  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=258483/65536, short=0/0
     lat (usec): 4=0.01%, 10=13.69%, 20=84.06%, 50=2.24%, 100=0.01%
     lat (usec): 250=0.01%
     lat (msec): 750=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=241MiB/s, minb=241MiB/s, maxb=241MiB/s, mint=16983msec, maxt=16983msec
  WRITE: io=4,096MiB, aggrb=22,367KiB/s, minb=22,367KiB/s, maxb=22,367KiB/s, mint=187518msec, maxt=187518msec

Run status group 1 (all jobs):
   READ: io=4,039MiB, aggrb=161MiB/s, minb=161MiB/s, maxb=161MiB/s, mint=25051msec, maxt=25051msec
  WRITE: io=1,024MiB, aggrb=50,095KiB/s, minb=50,095KiB/s, maxb=50,095KiB/s, mint=20932msec, maxt=20932msec

Disk stats (read/write):
  sda: ios=16924/62269, merge=517/1234374, ticks=232942/124385225, in_queue=124618099, util=93.35%
66.44user 32.17system 11:22.19elapsed 14%CPU (0avgtext+0avgdata 16861648maxresident)k
8390800inputs+18763216outputs (8major+3220793minor)pagefaults 0swaps