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=14778
  read : io=4,096MiB, bw=236MiB/s, iops=15,108, runt= 17351msec
    clat (usec): min=10, max=181, avg=13.93, stdev= 2.35
    bw (KiB/s) : min=    0, max=249056, per=97.19%, avg=234944.00, stdev=41269.15
  write: io=4,096MiB, bw=23,169KiB/s, iops=1,448, runt=181028msec
    clat (usec): min=15, max=944K, avg=593.96, stdev=7194.69
    bw (KiB/s) : min=    0, max=88064, per=101.87%, avg=23601.90, stdev=16505.94
  cpu          : usr=19.76%, sys=3.04%, ctx=18999, majf=1, minf=2108485
  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=65.92%, 50=30.69%, 100=0.11%, 250=0.28%, 500=0.13%
     lat (usec): 750=0.16%, 1000=0.18%
     lat (msec): 2=1.18%, 4=0.79%, 10=0.13%, 20=0.13%, 50=0.13%
     lat (msec): 100=0.12%, 250=0.05%, 500=0.01%, 750=0.01%, 1000=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=14975
  read : io=4,038MiB, bw=164MiB/s, iops=10,489, runt= 24634msec
    clat (usec): min=2, max=161, avg=13.40, stdev= 3.42
    bw (KiB/s) : min=    0, max=247200, per=97.81%, avg=164151.04, stdev=40001.45
  write: io=1,024MiB, bw=51,227KiB/s, iops=3,201, runt= 20469msec
    clat (usec): min=2, max=11,772, avg=18.39, stdev=46.04
    bw (KiB/s) : min=    0, max=53664, per=97.56%, avg=49979.05, stdev=8097.71
  cpu          : usr=7.26%, sys=0.85%, ctx=1560, majf=0, minf=1116120
  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=258402/65536, short=0/0
     lat (usec): 4=0.01%, 10=13.57%, 20=78.57%, 50=7.83%, 100=0.01%
     lat (usec): 250=0.01%
     lat (msec): 20=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=236MiB/s, minb=236MiB/s, maxb=236MiB/s, mint=17351msec, maxt=17351msec
  WRITE: io=4,096MiB, aggrb=23,169KiB/s, minb=23,169KiB/s, maxb=23,169KiB/s, mint=181028msec, maxt=181028msec

Run status group 1 (all jobs):
   READ: io=4,038MiB, aggrb=164MiB/s, minb=164MiB/s, maxb=164MiB/s, mint=24634msec, maxt=24634msec
  WRITE: io=1,024MiB, aggrb=51,228KiB/s, minb=51,228KiB/s, maxb=51,228KiB/s, mint=20469msec, maxt=20469msec

Disk stats (read/write):
  sda: ios=17073/62226, merge=368/1234167, ticks=293213/97453267, in_queue=97746421, util=92.53%
67.06user 32.67system 10:41.14elapsed 15%CPU (0avgtext+0avgdata 0maxresident)k
8390824inputs+18826160outputs (8major+3228306minor)pagefaults 0swaps