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=30175
  read : io=4,096MiB, bw=236MiB/s, iops=15,089, runt= 17373msec
    clat (usec): min=11, max=173, avg=14.13, stdev= 2.25
    bw (KiB/s) : min=    0, max=248864, per=97.18%, avg=234635.89, stdev=41185.78
  write: io=4,096MiB, bw=24,035KiB/s, iops=1,502, runt=174506msec
    clat (usec): min=15, max=388K, avg=569.37, stdev=6428.41
    bw (KiB/s) : min=    0, max=87713, per=101.14%, avg=24309.12, stdev=16697.74
  cpu          : usr=20.19%, sys=3.16%, ctx=18021, majf=1, minf=2108721
  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=65.25%, 50=31.37%, 100=0.09%, 250=0.28%, 500=0.13%
     lat (usec): 750=0.18%, 1000=0.19%
     lat (msec): 2=1.19%, 4=0.77%, 10=0.11%, 20=0.13%, 50=0.11%
     lat (msec): 100=0.12%, 250=0.05%, 500=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=30370
  read : io=4,038MiB, bw=163MiB/s, iops=10,454, runt= 24719msec
    clat (usec): min=2, max=304, avg=13.41, stdev= 3.51
    bw (KiB/s) : min=    0, max=248448, per=97.86%, avg=163687.04, stdev=40519.41
  write: io=1,024MiB, bw=50,889KiB/s, iops=3,180, runt= 20605msec
    clat (usec): min=3, max=31,512, avg=18.70, stdev=123.08
    bw (KiB/s) : min=    0, max=52960, per=97.66%, avg=49701.14, stdev=7936.52
  cpu          : usr=7.43%, sys=0.87%, ctx=1709, majf=0, minf=1116949
  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=258426/65536, short=0/0
     lat (usec): 4=0.01%, 10=13.58%, 20=79.13%, 50=7.25%, 100=0.01%
     lat (usec): 250=0.01%, 500=0.01%
     lat (msec): 50=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=236MiB/s, minb=236MiB/s, maxb=236MiB/s, mint=17373msec, maxt=17373msec
  WRITE: io=4,096MiB, aggrb=24,035KiB/s, minb=24,035KiB/s, maxb=24,035KiB/s, mint=174506msec, maxt=174506msec

Run status group 1 (all jobs):
   READ: io=4,038MiB, aggrb=163MiB/s, minb=163MiB/s, maxb=163MiB/s, mint=24719msec, maxt=24719msec
  WRITE: io=1,024MiB, aggrb=50,890KiB/s, minb=50,890KiB/s, maxb=50,890KiB/s, mint=20605msec, maxt=20605msec

Disk stats (read/write):
  sda: ios=17073/62680, merge=368/1234019, ticks=278090/95776686, in_queue=96054723, util=92.38%
67.14user 32.29system 10:25.34elapsed 15%CPU (0avgtext+0avgdata 0maxresident)k
8390640inputs+18835824outputs (7major+3229327minor)pagefaults 0swaps