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=19279
  read : io=4,096MiB, bw=231MiB/s, iops=14,777, runt= 17740msec
    clat (usec): min=11, max=165, avg=14.11, stdev= 2.71
    bw (KiB/s) : min=    0, max=246848, per=97.18%, avg=229766.22, stdev=46494.04
  write: io=4,096MiB, bw=20,847KiB/s, iops=1,302, runt=201190msec
    clat (usec): min=15, max=939K, avg=540.21, stdev=9055.88
    bw (KiB/s) : min=    0, max=81600, per=105.92%, avg=22081.70, stdev=17554.22
  cpu          : usr=33.00%, sys=5.06%, ctx=25345, majf=1, minf=2102309
  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=49.93%, 50=45.98%, 100=0.76%, 250=1.61%, 500=0.38%
     lat (usec): 750=0.11%, 1000=0.15%
     lat (msec): 2=0.21%, 4=0.14%, 10=0.27%, 20=0.18%, 50=0.15%
     lat (msec): 100=0.07%, 250=0.04%, 500=0.01%, 750=0.01%, 1000=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=19557
  read : io=4,037MiB, bw=162MiB/s, iops=10,357, runt= 24946msec
    clat (usec): min=2, max=145, avg=14.18, stdev= 3.48
    bw (KiB/s) : min=    0, max=243104, per=97.83%, avg=162116.48, stdev=40035.31
  write: io=1,024MiB, bw=50,317KiB/s, iops=3,144, runt= 20839msec
    clat (usec): min=3, max=147, avg=18.76, stdev= 3.76
    bw (KiB/s) : min=    0, max=54272, per=97.41%, avg=49013.93, stdev=7912.89
  cpu          : usr=6.56%, sys=0.89%, ctx=5462, majf=0, minf=1114475
  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=258371/65536, short=0/0
     lat (usec): 4=0.01%, 10=10.02%, 20=80.70%, 50=9.26%, 100=0.01%
     lat (usec): 250=0.01%


Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=231MiB/s, minb=231MiB/s, maxb=231MiB/s, mint=17740msec, maxt=17740msec
  WRITE: io=4,096MiB, aggrb=20,847KiB/s, minb=20,847KiB/s, maxb=20,847KiB/s, mint=201190msec, maxt=201190msec

Run status group 1 (all jobs):
   READ: io=4,037MiB, aggrb=162MiB/s, minb=162MiB/s, maxb=162MiB/s, mint=24946msec, maxt=24946msec
  WRITE: io=1,024MiB, aggrb=50,318KiB/s, minb=50,318KiB/s, maxb=50,318KiB/s, mint=20839msec, maxt=20839msec

Disk stats (read/write):
  sda: ios=17244/62190, merge=197/1234065, ticks=225048/124123326, in_queue=124348240, util=93.16%
103.90user 51.90system 11:34.00elapsed 22%CPU (0avgtext+0avgdata 16861712maxresident)k
8390640inputs+18760016outputs (8major+3220732minor)pagefaults 0swaps