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=17052
  read : io=4,096MiB, bw=230MiB/s, iops=14,700, runt= 17832msec
    clat (usec): min=11, max=157, avg=13.52, stdev= 2.94
    bw (KiB/s) : min=    0, max=248416, per=97.25%, avg=228752.89, stdev=52564.71
  write: io=4,096MiB, bw=18,796KiB/s, iops=1,174, runt=223138msec
    clat (usec): min=13, max=923K, avg=644.07, stdev=7503.28
    bw (KiB/s) : min=    0, max=66671, per=103.30%, avg=19416.11, stdev=18168.59
  cpu          : usr=30.55%, sys=3.74%, ctx=15457, majf=0, minf=2102313
  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=55.44%, 50=40.93%, 100=0.27%, 250=1.03%, 500=0.28%
     lat (usec): 750=0.08%, 1000=0.15%
     lat (msec): 2=0.90%, 4=0.27%, 10=0.16%, 20=0.12%, 50=0.17%
     lat (msec): 100=0.15%, 250=0.06%, 500=0.01%, 750=0.01%, 1000=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=17067
  read : io=4,038MiB, bw=44,426KiB/s, iops=2,776, runt= 93062msec
    clat (usec): min=2, max=786, avg=19.80, stdev= 8.23
    bw (KiB/s) : min=    0, max=239904, per=194.15%, avg=86252.77, stdev=75876.01
  write: io=1,024MiB, bw=11,888KiB/s, iops=743, runt= 88198msec
    clat (usec): min=2, max=2,812K, avg=922.90, stdev=39347.60
    bw (KiB/s) : min=    0, max=49760, per=198.75%, avg=23627.11, stdev=21403.09
  cpu          : usr=10.98%, sys=1.85%, ctx=4634, majf=0, minf=1126464
  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=258400/65536, short=0/0
     lat (usec): 4=0.01%, 10=1.24%, 20=41.05%, 50=57.50%, 100=0.13%
     lat (usec): 250=0.04%, 500=0.01%, 1000=0.01%
     lat (msec): 500=0.01%, 750=0.01%, 2000=0.01%, >=2000=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=230MiB/s, minb=230MiB/s, maxb=230MiB/s, mint=17832msec, maxt=17832msec
  WRITE: io=4,096MiB, aggrb=18,796KiB/s, minb=18,796KiB/s, maxb=18,796KiB/s, mint=223138msec, maxt=223138msec

Run status group 1 (all jobs):
   READ: io=4,038MiB, aggrb=44,426KiB/s, minb=44,426KiB/s, maxb=44,426KiB/s, mint=93062msec, maxt=93062msec
  WRITE: io=1,024MiB, aggrb=11,888KiB/s, minb=11,888KiB/s, maxb=11,888KiB/s, mint=88198msec, maxt=88198msec

Disk stats (read/write):
  sda: ios=18444/62159, merge=14351/1236407, ticks=247380/49142732, in_queue=49390080, util=94.08%
106.84user 51.17system 10:33.70elapsed 24%CPU (0avgtext+0avgdata 0maxresident)k
8389552inputs+18855608outputs (27major+3232413minor)pagefaults 0swaps