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=4784
  read : io=4,096MiB, bw=233MiB/s, iops=14,892, runt= 17603msec
    clat (usec): min=11, max=825, avg=15.04, stdev= 2.82
    bw (KiB/s) : min=    0, max=248672, per=97.24%, avg=231707.56, stdev=40347.83
  write: io=4,096MiB, bw=20,628KiB/s, iops=1,289, runt=203327msec
    clat (usec): min=14, max=736K, avg=575.22, stdev=9484.87
    bw (KiB/s) : min=    0, max=79424, per=105.89%, avg=21842.52, stdev=20931.54
  cpu          : usr=31.63%, sys=4.46%, ctx=61973, 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=50.76%, 50=45.54%, 100=0.44%, 250=0.83%, 500=0.97%
     lat (usec): 750=0.22%, 1000=0.29%
     lat (msec): 2=0.40%, 4=0.06%, 10=0.14%, 20=0.10%, 50=0.08%
     lat (msec): 100=0.09%, 250=0.07%, 500=0.01%, 750=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=5049
  read : io=4,038MiB, bw=159MiB/s, iops=10,190, runt= 25357msec
    clat (usec): min=2, max=815, avg=15.34, stdev= 4.58
    bw (KiB/s) : min=    0, max=245376, per=97.74%, avg=159378.82, stdev=39804.65
  write: io=1,024MiB, bw=49,610KiB/s, iops=3,100, runt= 21136msec
    clat (usec): min=2, max=287, avg=20.03, stdev= 4.69
    bw (KiB/s) : min=    0, max=52544, per=97.68%, avg=48458.42, stdev=7883.45
  cpu          : usr=6.75%, sys=0.96%, ctx=13060, majf=0, minf=1114055
  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=258413/65536, short=0/0
     lat (usec): 4=0.01%, 10=5.44%, 20=79.01%, 50=15.49%, 100=0.03%
     lat (usec): 250=0.01%, 500=0.01%, 750=0.01%, 1000=0.01%


Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=233MiB/s, minb=233MiB/s, maxb=233MiB/s, mint=17603msec, maxt=17603msec
  WRITE: io=4,096MiB, aggrb=20,628KiB/s, minb=20,628KiB/s, maxb=20,628KiB/s, mint=203327msec, maxt=203327msec

Run status group 1 (all jobs):
   READ: io=4,038MiB, aggrb=159MiB/s, minb=159MiB/s, maxb=159MiB/s, mint=25357msec, maxt=25357msec
  WRITE: io=1,024MiB, aggrb=49,611KiB/s, minb=49,611KiB/s, maxb=49,611KiB/s, mint=21136msec, maxt=21136msec

Disk stats (read/write):
  sda: ios=16685/69313, merge=756/1227143, ticks=235788/117046426, in_queue=117282135, util=92.86%
97.03user 49.62system 11:22.93elapsed 21%CPU (0avgtext+0avgdata 16861712maxresident)k
8390792inputs+18761624outputs (9major+3220244minor)pagefaults 0swaps